Update Mustache to 46286a1

35 files changed, 4802 insertions, 2201 deletions

diff --git a/Mustache/Autoloader.php b/Mustache/Autoloader.php
index 707a0ffa..e8ea3f4a 100644
--- a/Mustache/Autoloader.php
+++ b/Mustache/Autoloader.php
@@ -1,69 +1,88 @@
-<?php

-

-/*

- * This file is part of Mustache.php.

- *

- * (c) 2012 Justin Hileman

- *

- * For the full copyright and license information, please view the LICENSE

- * file that was distributed with this source code.

- */

-

-/**

- * Mustache class autoloader.

- */

-class Mustache_Autoloader

-{

-

-    private $baseDir;

-

-    /**

-     * Autoloader constructor.

-     *

-     * @param string $baseDir Mustache library base directory (default: dirname(__FILE__).'/..')

-     */

-    public function __construct($baseDir = null)

-    {

-        if ($baseDir === null) {

-            $this->baseDir = dirname(__FILE__).'/..';

-        } else {

-            $this->baseDir = rtrim($baseDir, '/');

-        }

-    }

-

-    /**

-     * Register a new instance as an SPL autoloader.

-     *

-     * @param string $baseDir Mustache library base directory (default: dirname(__FILE__).'/..')

-     *

-     * @return Mustache_Autoloader Registered Autoloader instance

-     */

-    public static function register($baseDir = null)

-    {

-        $loader = new self($baseDir);

-        spl_autoload_register(array($loader, 'autoload'));

-

-        return $loader;

-    }

-

-    /**

-     * Autoload Mustache classes.

-     *

-     * @param string $class

-     */

-    public function autoload($class)

-    {

-        if ($class[0] === '\\') {

-            $class = substr($class, 1);

-        }

-

-        if (strpos($class, 'Mustache') !== 0) {

-            return;

-        }

-

-        $file = sprintf('%s/%s.php', $this->baseDir, str_replace('_', '/', $class));

-        if (is_file($file)) {

-            require $file;

-        }

-    }

-}

+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Mustache class autoloader.
+ */
+class Mustache_Autoloader
+{
+    private $baseDir;
+
+    /**
+     * An array where the key is the baseDir and the key is an instance of this
+     * class.
+     *
+     * @var array
+     */
+    private static $instances;
+
+    /**
+     * Autoloader constructor.
+     *
+     * @param string $baseDir Mustache library base directory (default: dirname(__FILE__).'/..')
+     */
+    public function __construct($baseDir = null)
+    {
+        if ($baseDir === null) {
+            $baseDir = dirname(__FILE__) . '/..';
+        }
+
+        // realpath doesn't always work, for example, with stream URIs
+        $realDir = realpath($baseDir);
+        if (is_dir($realDir)) {
+            $this->baseDir = $realDir;
+        } else {
+            $this->baseDir = $baseDir;
+        }
+    }
+
+    /**
+     * Register a new instance as an SPL autoloader.
+     *
+     * @param string $baseDir Mustache library base directory (default: dirname(__FILE__).'/..')
+     *
+     * @return Mustache_Autoloader Registered Autoloader instance
+     */
+    public static function register($baseDir = null)
+    {
+        $key = $baseDir ? $baseDir : 0;
+
+        if (!isset(self::$instances[$key])) {
+            self::$instances[$key] = new self($baseDir);
+        }
+
+        $loader = self::$instances[$key];
+        spl_autoload_register(array($loader, 'autoload'));
+
+        return $loader;
+    }
+
+    /**
+     * Autoload Mustache classes.
+     *
+     * @param string $class
+     */
+    public function autoload($class)
+    {
+        if ($class[0] === '\\') {
+            $class = substr($class, 1);
+        }
+
+        if (strpos($class, 'Mustache') !== 0) {
+            return;
+        }
+
+        $file = sprintf('%s/%s.php', $this->baseDir, str_replace('_', '/', $class));
+        if (is_file($file)) {
+            require $file;
+        }
+    }
+}
diff --git a/Mustache/Cache.php b/Mustache/Cache.php
new file mode 100644
index 00000000..3292efac
--- /dev/null
+++ b/Mustache/Cache.php
@@ -0,0 +1,43 @@
+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Mustache Cache interface.
+ *
+ * Interface for caching and loading Mustache_Template classes
+ * generated by the Mustache_Compiler.
+ */
+interface Mustache_Cache
+{
+    /**
+     * Load a compiled Mustache_Template class from cache.
+     *
+     * @param string $key
+     *
+     * @return bool indicates successfully class load
+     */
+    public function load($key);
+
+    /**
+     * Cache and load a compiled Mustache_Template class.
+     *
+     * @param string $key
+     * @param string $value
+     */
+    public function cache($key, $value);
+
+    /**
+     * Set a logger instance.
+     *
+     * @param Mustache_Logger|Psr\Log\LoggerInterface $logger
+     */
+    public function setLogger($logger = null);
+}
diff --git a/Mustache/Cache/AbstractCache.php b/Mustache/Cache/AbstractCache.php
new file mode 100644
index 00000000..281038fa
--- /dev/null
+++ b/Mustache/Cache/AbstractCache.php
@@ -0,0 +1,60 @@
+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Abstract Mustache Cache class.
+ *
+ * Provides logging support to child implementations.
+ *
+ * @abstract
+ */
+abstract class Mustache_Cache_AbstractCache implements Mustache_Cache
+{
+    private $logger = null;
+
+    /**
+     * Get the current logger instance.
+     *
+     * @return Mustache_Logger|Psr\Log\LoggerInterface
+     */
+    public function getLogger()
+    {
+        return $this->logger;
+    }
+
+    /**
+     * Set a logger instance.
+     *
+     * @param Mustache_Logger|Psr\Log\LoggerInterface $logger
+     */
+    public function setLogger($logger = null)
+    {
+        if ($logger !== null && !($logger instanceof Mustache_Logger || is_a($logger, 'Psr\\Log\\LoggerInterface'))) {
+            throw new Mustache_Exception_InvalidArgumentException('Expected an instance of Mustache_Logger or Psr\\Log\\LoggerInterface.');
+        }
+
+        $this->logger = $logger;
+    }
+
+    /**
+     * Add a log record if logging is enabled.
+     *
+     * @param string $level   The logging level
+     * @param string $message The log message
+     * @param array  $context The log context
+     */
+    protected function log($level, $message, array $context = array())
+    {
+        if (isset($this->logger)) {
+            $this->logger->log($level, $message, $context);
+        }
+    }
+}
diff --git a/Mustache/Cache/FilesystemCache.php b/Mustache/Cache/FilesystemCache.php
new file mode 100644
index 00000000..3e742b70
--- /dev/null
+++ b/Mustache/Cache/FilesystemCache.php
@@ -0,0 +1,161 @@
+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Mustache Cache filesystem implementation.
+ *
+ * A FilesystemCache instance caches Mustache Template classes from the filesystem by name:
+ *
+ *     $cache = new Mustache_Cache_FilesystemCache(dirname(__FILE__).'/cache');
+ *     $cache->cache($className, $compiledSource);
+ *
+ * The FilesystemCache benefits from any opcode caching that may be setup in your environment. So do that, k?
+ */
+class Mustache_Cache_FilesystemCache extends Mustache_Cache_AbstractCache
+{
+    private $baseDir;
+    private $fileMode;
+
+    /**
+     * Filesystem cache constructor.
+     *
+     * @param string $baseDir  Directory for compiled templates
+     * @param int    $fileMode Override default permissions for cache files. Defaults to using the system-defined umask
+     */
+    public function __construct($baseDir, $fileMode = null)
+    {
+        $this->baseDir = $baseDir;
+        $this->fileMode = $fileMode;
+    }
+
+    /**
+     * Load the class from cache using `require_once`.
+     *
+     * @param string $key
+     *
+     * @return bool
+     */
+    public function load($key)
+    {
+        $fileName = $this->getCacheFilename($key);
+        if (!is_file($fileName)) {
+            return false;
+        }
+
+        require_once $fileName;
+
+        return true;
+    }
+
+    /**
+     * Cache and load the compiled class.
+     *
+     * @param string $key
+     * @param string $value
+     */
+    public function cache($key, $value)
+    {
+        $fileName = $this->getCacheFilename($key);
+
+        $this->log(
+            Mustache_Logger::DEBUG,
+            'Writing to template cache: "{fileName}"',
+            array('fileName' => $fileName)
+        );
+
+        $this->writeFile($fileName, $value);
+        $this->load($key);
+    }
+
+    /**
+     * Build the cache filename.
+     * Subclasses should override for custom cache directory structures.
+     *
+     * @param string $name
+     *
+     * @return string
+     */
+    protected function getCacheFilename($name)
+    {
+        return sprintf('%s/%s.php', $this->baseDir, $name);
+    }
+
+    /**
+     * Create cache directory.
+     *
+     * @throws Mustache_Exception_RuntimeException If unable to create directory
+     *
+     * @param string $fileName
+     *
+     * @return string
+     */
+    private function buildDirectoryForFilename($fileName)
+    {
+        $dirName = dirname($fileName);
+        if (!is_dir($dirName)) {
+            $this->log(
+                Mustache_Logger::INFO,
+                'Creating Mustache template cache directory: "{dirName}"',
+                array('dirName' => $dirName)
+            );
+
+            @mkdir($dirName, 0777, true);
+            // @codeCoverageIgnoreStart
+            if (!is_dir($dirName)) {
+                throw new Mustache_Exception_RuntimeException(sprintf('Failed to create cache directory "%s".', $dirName));
+            }
+            // @codeCoverageIgnoreEnd
+        }
+
+        return $dirName;
+    }
+
+    /**
+     * Write cache file.
+     *
+     * @throws Mustache_Exception_RuntimeException If unable to write file
+     *
+     * @param string $fileName
+     * @param string $value
+     */
+    private function writeFile($fileName, $value)
+    {
+        $dirName = $this->buildDirectoryForFilename($fileName);
+
+        $this->log(
+            Mustache_Logger::DEBUG,
+            'Caching compiled template to "{fileName}"',
+            array('fileName' => $fileName)
+        );
+
+        $tempFile = tempnam($dirName, basename($fileName));
+        if (false !== @file_put_contents($tempFile, $value)) {
+            if (@rename($tempFile, $fileName)) {
+                $mode = isset($this->fileMode) ? $this->fileMode : (0666 & ~umask());
+                @chmod($fileName, $mode);
+
+                return;
+            }
+
+            // @codeCoverageIgnoreStart
+            $this->log(
+                Mustache_Logger::ERROR,
+                'Unable to rename Mustache temp cache file: "{tempName}" -> "{fileName}"',
+                array('tempName' => $tempFile, 'fileName' => $fileName)
+            );
+            // @codeCoverageIgnoreEnd
+        }
+
+        // @codeCoverageIgnoreStart
+        throw new Mustache_Exception_RuntimeException(sprintf('Failed to write cache file "%s".', $fileName));
+        // @codeCoverageIgnoreEnd
+    }
+}
diff --git a/Mustache/Cache/NoopCache.php b/Mustache/Cache/NoopCache.php
new file mode 100644
index 00000000..ed9eec9d
--- /dev/null
+++ b/Mustache/Cache/NoopCache.php
@@ -0,0 +1,47 @@
+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Mustache Cache in-memory implementation.
+ *
+ * The in-memory cache is used for uncached lambda section templates. It's also useful during development, but is not
+ * recommended for production use.
+ */
+class Mustache_Cache_NoopCache extends Mustache_Cache_AbstractCache
+{
+    /**
+     * Loads nothing. Move along.
+     *
+     * @param string $key
+     *
+     * @return bool
+     */
+    public function load($key)
+    {
+        return false;
+    }
+
+    /**
+     * Loads the compiled Mustache Template class without caching.
+     *
+     * @param string $key
+     * @param string $value
+     */
+    public function cache($key, $value)
+    {
+        $this->log(
+            Mustache_Logger::WARNING,
+            'Template cache disabled, evaluating "{className}" class at runtime',
+            array('className' => $key)
+        );
+        eval('?>' . $value);
+    }
+}
diff --git a/Mustache/Compiler.php b/Mustache/Compiler.php
index dd5307d4..2b0d1f93 100644
--- a/Mustache/Compiler.php
+++ b/Mustache/Compiler.php
@@ -1,386 +1,718 @@
-<?php

-

-/*

- * This file is part of Mustache.php.

- *

- * (c) 2012 Justin Hileman

- *

- * For the full copyright and license information, please view the LICENSE

- * file that was distributed with this source code.

- */

-

-/**

- * Mustache Compiler class.

- *

- * This class is responsible for turning a Mustache token parse tree into normal PHP source code.

- */

-class Mustache_Compiler

-{

-

-    private $sections;

-    private $source;

-    private $indentNextLine;

-    private $customEscape;

-    private $charset;

-

-    /**

-     * Compile a Mustache token parse tree into PHP source code.

-     *

-     * @param string $source       Mustache Template source code

-     * @param string $tree         Parse tree of Mustache tokens

-     * @param string $name         Mustache Template class name

-     * @param bool   $customEscape (default: false)

-     * @param string $charset      (default: 'UTF-8')

-     *

-     * @return string Generated PHP source code

-     */

-    public function compile($source, array $tree, $name, $customEscape = false, $charset = 'UTF-8')

-    {

-        $this->sections       = array();

-        $this->source         = $source;

-        $this->indentNextLine = true;

-        $this->customEscape   = $customEscape;

-        $this->charset        = $charset;

-

-        return $this->writeCode($tree, $name);

-    }

-

-    /**

-     * Helper function for walking the Mustache token parse tree.

-     *

-     * @throws InvalidArgumentException upon encountering unknown token types.

-     *

-     * @param array $tree  Parse tree of Mustache tokens

-     * @param int   $level (default: 0)

-     *

-     * @return string Generated PHP source code

-     */

-    private function walk(array $tree, $level = 0)

-    {

-        $code = '';

-        $level++;

-        foreach ($tree as $node) {

-            switch ($node[Mustache_Tokenizer::TYPE]) {

-                case Mustache_Tokenizer::T_SECTION:

-                    $code .= $this->section(

-                        $node[Mustache_Tokenizer::NODES],

-                        $node[Mustache_Tokenizer::NAME],

-                        $node[Mustache_Tokenizer::INDEX],

-                        $node[Mustache_Tokenizer::END],

-                        $node[Mustache_Tokenizer::OTAG],

-                        $node[Mustache_Tokenizer::CTAG],

-                        $level

-                    );

-                    break;

-

-                case Mustache_Tokenizer::T_INVERTED:

-                    $code .= $this->invertedSection(

-                        $node[Mustache_Tokenizer::NODES],

-                        $node[Mustache_Tokenizer::NAME],

-                        $level

-                    );

-                    break;

-

-                case Mustache_Tokenizer::T_PARTIAL:

-                case Mustache_Tokenizer::T_PARTIAL_2:

-                    $code .= $this->partial(

-                        $node[Mustache_Tokenizer::NAME],

-                        isset($node[Mustache_Tokenizer::INDENT]) ? $node[Mustache_Tokenizer::INDENT] : '',

-                        $level

-                    );

-                    break;

-

-                case Mustache_Tokenizer::T_UNESCAPED:

-                case Mustache_Tokenizer::T_UNESCAPED_2:

-                    $code .= $this->variable($node[Mustache_Tokenizer::NAME], false, $level);

-                    break;

-

-                case Mustache_Tokenizer::T_COMMENT:

-                    break;

-

-                case Mustache_Tokenizer::T_ESCAPED:

-                    $code .= $this->variable($node[Mustache_Tokenizer::NAME], true, $level);

-                    break;

-

-                case Mustache_Tokenizer::T_TEXT:

-                    $code .= $this->text($node[Mustache_Tokenizer::VALUE], $level);

-                    break;

-

-                default:

-                    throw new InvalidArgumentException('Unknown node type: '.json_encode($node));

-            }

-        }

-

-        return $code;

-    }

-

-    const KLASS = '<?php

-

-        class %s extends Mustache_Template

-        {

-            public function renderInternal(Mustache_Context $context, $indent = \'\', $escape = false)

-            {

-                $buffer = \'\';

-        %s

-

-                if ($escape) {

-                    return %s;

-                } else {

-                    return $buffer;

-                }

-            }

-        %s

-        }';

-

-    /**

-     * Generate Mustache Template class PHP source.

-     *

-     * @param array  $tree Parse tree of Mustache tokens

-     * @param string $name Mustache Template class name

-     *

-     * @return string Generated PHP source code

-     */

-    private function writeCode($tree, $name)

-    {

-        $code     = $this->walk($tree);

-        $sections = implode("\n", $this->sections);

-

-        return sprintf($this->prepare(self::KLASS, 0, false), $name, $code, $this->getEscape('$buffer'), $sections);

-    }

-

-    const SECTION_CALL = '

-        // %s section

-        $buffer .= $this->section%s($context, $indent, $context->%s(%s));

-    ';

-

-    const SECTION = '

-        private function section%s(Mustache_Context $context, $indent, $value) {

-            $buffer = \'\';

-            if (!is_string($value) && is_callable($value)) {

-                $source = %s;

-                $buffer .= $this->mustache

-                    ->loadLambda((string) call_user_func($value, $source)%s)

-                    ->renderInternal($context, $indent);

-            } elseif (!empty($value)) {

-                $values = $this->isIterable($value) ? $value : array($value);

-                foreach ($values as $value) {

-                    $context->push($value);%s

-                    $context->pop();

-                }

-            }

-

-            return $buffer;

-        }';

-

-    /**

-     * Generate Mustache Template section PHP source.

-     *

-     * @param array  $nodes Array of child tokens

-     * @param string $id    Section name

-     * @param int    $start Section start offset

-     * @param int    $end   Section end offset

-     * @param string $otag  Current Mustache opening tag

-     * @param string $ctag  Current Mustache closing tag

-     * @param int    $level

-     *

-     * @return string Generated section PHP source code

-     */

-    private function section($nodes, $id, $start, $end, $otag, $ctag, $level)

-    {

-        $method = $this->getFindMethod($id);

-        $id     = var_export($id, true);

-        $source = var_export(substr($this->source, $start, $end - $start), true);

-

-        if ($otag !== '{{' || $ctag !== '}}') {

-            $delims = ', '.var_export(sprintf('{{= %s %s =}}', $otag, $ctag), true);

-        } else {

-            $delims = '';

-        }

-

-        $key    = ucfirst(md5($delims."\n".$source));

-

-        if (!isset($this->sections[$key])) {

-            $this->sections[$key] = sprintf($this->prepare(self::SECTION), $key, $source, $delims, $this->walk($nodes, 2));

-        }

-

-        return sprintf($this->prepare(self::SECTION_CALL, $level), $id, $key, $method, $id);

-    }

-

-    const INVERTED_SECTION = '

-        // %s inverted section

-        $value = $context->%s(%s);

-        if (empty($value)) {

-            %s

-        }';

-

-    /**

-     * Generate Mustache Template inverted section PHP source.

-     *

-     * @param array  $nodes Array of child tokens

-     * @param string $id    Section name

-     * @param int    $level

-     *

-     * @return string Generated inverted section PHP source code

-     */

-    private function invertedSection($nodes, $id, $level)

-    {

-        $method = $this->getFindMethod($id);

-        $id     = var_export($id, true);

-

-        return sprintf($this->prepare(self::INVERTED_SECTION, $level), $id, $method, $id, $this->walk($nodes, $level));

-    }

-

-    const PARTIAL = '

-        if ($partial = $this->mustache->loadPartial(%s)) {

-            $buffer .= $partial->renderInternal($context, %s);

-        }

-    ';

-

-    /**

-     * Generate Mustache Template partial call PHP source.

-     *

-     * @param string $id     Partial name

-     * @param string $indent Whitespace indent to apply to partial

-     * @param int    $level

-     *

-     * @return string Generated partial call PHP source code

-     */

-    private function partial($id, $indent, $level)

-    {

-        return sprintf(

-            $this->prepare(self::PARTIAL, $level),

-            var_export($id, true),

-            var_export($indent, true)

-        );

-    }

-

-    const VARIABLE = '

-        $value = $context->%s(%s);

-        if (!is_string($value) && is_callable($value)) {

-            $value = $this->mustache

-                ->loadLambda((string) call_user_func($value))

-                ->renderInternal($context, $indent);

-        }

-        $buffer .= %s%s;

-    ';

-

-    /**

-     * Generate Mustache Template variable interpolation PHP source.

-     *

-     * @param string  $id     Variable name

-     * @param boolean $escape Escape the variable value for output?

-     * @param int     $level

-     *

-     * @return string Generated variable interpolation PHP source

-     */

-    private function variable($id, $escape, $level)

-    {

-        $method = $this->getFindMethod($id);

-        $id     = ($method !== 'last') ? var_export($id, true) : '';

-        $value  = $escape ? $this->getEscape() : '$value';

-

-        return sprintf($this->prepare(self::VARIABLE, $level), $method, $id, $this->flushIndent(), $value);

-    }

-

-    const LINE = '$buffer .= "\n";';

-    const TEXT = '$buffer .= %s%s;';

-

-    /**

-     * Generate Mustache Template output Buffer call PHP source.

-     *

-     * @param string $text

-     * @param int    $level

-     *

-     * @return string Generated output Buffer call PHP source

-     */

-    private function text($text, $level)

-    {

-        if ($text === "\n") {

-            $this->indentNextLine = true;

-

-            return $this->prepare(self::LINE, $level);

-        } else {

-            return sprintf($this->prepare(self::TEXT, $level), $this->flushIndent(), var_export($text, true));

-        }

-    }

-

-    /**

-     * Prepare PHP source code snippet for output.

-     *

-     * @param string  $text

-     * @param int     $bonus          Additional indent level (default: 0)

-     * @param boolean $prependNewline Prepend a newline to the snippet? (default: true)

-     *

-     * @return string PHP source code snippet

-     */

-    private function prepare($text, $bonus = 0, $prependNewline = true)

-    {

-        $text = ($prependNewline ? "\n" : '').trim($text);

-        if ($prependNewline) {

-            $bonus++;

-        }

-

-        return preg_replace("/\n( {8})?/", "\n".str_repeat(" ", $bonus * 4), $text);

-    }

-

-    const DEFAULT_ESCAPE = 'htmlspecialchars(%s, ENT_COMPAT, %s)';

-    const CUSTOM_ESCAPE  = 'call_user_func($this->mustache->getEscape(), %s)';

-

-    /**

-     * Get the current escaper.

-     *

-     * @param string $value (default: '$value')

-     *

-     * @return string Either a custom callback, or an inline call to `htmlspecialchars`

-     */

-    private function getEscape($value = '$value')

-    {

-        if ($this->customEscape) {

-            return sprintf(self::CUSTOM_ESCAPE, $value);

-        } else {

-            return sprintf(self::DEFAULT_ESCAPE, $value, var_export($this->charset, true));

-        }

-    }

-

-    /**

-     * Select the appropriate Context `find` method for a given $id.

-     *

-     * The return value will be one of `find`, `findDot` or `last`.

-     *

-     * @see Mustache_Context::find

-     * @see Mustache_Context::findDot

-     * @see Mustache_Context::last

-     *

-     * @param string $id Variable name

-     *

-     * @return string `find` method name

-     */

-    private function getFindMethod($id)

-    {

-        if ($id === '.') {

-            return 'last';

-        } elseif (strpos($id, '.') === false) {

-            return 'find';

-        } else {

-            return 'findDot';

-        }

-    }

-

-    const LINE_INDENT = '$indent . ';

-

-    /**

-     * Get the current $indent prefix to write to the buffer.

-     *

-     * @return string "$indent . " or ""

-     */

-    private function flushIndent()

-    {

-        if ($this->indentNextLine) {

-            $this->indentNextLine = false;

-

-            return self::LINE_INDENT;

-        } else {

-            return '';

-        }

-    }

-}

+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Mustache Compiler class.
+ *
+ * This class is responsible for turning a Mustache token parse tree into normal PHP source code.
+ */
+class Mustache_Compiler
+{
+    private $pragmas;
+    private $defaultPragmas = array();
+    private $sections;
+    private $blocks;
+    private $source;
+    private $indentNextLine;
+    private $customEscape;
+    private $entityFlags;
+    private $charset;
+    private $strictCallables;
+
+    /**
+     * Compile a Mustache token parse tree into PHP source code.
+     *
+     * @param string $source          Mustache Template source code
+     * @param string $tree            Parse tree of Mustache tokens
+     * @param string $name            Mustache Template class name
+     * @param bool   $customEscape    (default: false)
+     * @param string $charset         (default: 'UTF-8')
+     * @param bool   $strictCallables (default: false)
+     * @param int    $entityFlags     (default: ENT_COMPAT)
+     *
+     * @return string Generated PHP source code
+     */
+    public function compile($source, array $tree, $name, $customEscape = false, $charset = 'UTF-8', $strictCallables = false, $entityFlags = ENT_COMPAT)
+    {
+        $this->pragmas         = $this->defaultPragmas;
+        $this->sections        = array();
+        $this->blocks          = array();
+        $this->source          = $source;
+        $this->indentNextLine  = true;
+        $this->customEscape    = $customEscape;
+        $this->entityFlags     = $entityFlags;
+        $this->charset         = $charset;
+        $this->strictCallables = $strictCallables;
+
+        return $this->writeCode($tree, $name);
+    }
+
+    /**
+     * Enable pragmas across all templates, regardless of the presence of pragma
+     * tags in the individual templates.
+     *
+     * @internal Users should set global pragmas in Mustache_Engine, not here :)
+     *
+     * @param string[] $pragmas
+     */
+    public function setPragmas(array $pragmas)
+    {
+        $this->pragmas = array();
+        foreach ($pragmas as $pragma) {
+            $this->pragmas[$pragma] = true;
+        }
+        $this->defaultPragmas = $this->pragmas;
+    }
+
+    /**
+     * Helper function for walking the Mustache token parse tree.
+     *
+     * @throws Mustache_Exception_SyntaxException upon encountering unknown token types
+     *
+     * @param array $tree  Parse tree of Mustache tokens
+     * @param int   $level (default: 0)
+     *
+     * @return string Generated PHP source code
+     */
+    private function walk(array $tree, $level = 0)
+    {
+        $code = '';
+        $level++;
+        foreach ($tree as $node) {
+            switch ($node[Mustache_Tokenizer::TYPE]) {
+                case Mustache_Tokenizer::T_PRAGMA:
+                    $this->pragmas[$node[Mustache_Tokenizer::NAME]] = true;
+                    break;
+
+                case Mustache_Tokenizer::T_SECTION:
+                    $code .= $this->section(
+                        $node[Mustache_Tokenizer::NODES],
+                        $node[Mustache_Tokenizer::NAME],
+                        isset($node[Mustache_Tokenizer::FILTERS]) ? $node[Mustache_Tokenizer::FILTERS] : array(),
+                        $node[Mustache_Tokenizer::INDEX],
+                        $node[Mustache_Tokenizer::END],
+                        $node[Mustache_Tokenizer::OTAG],
+                        $node[Mustache_Tokenizer::CTAG],
+                        $level
+                    );
+                    break;
+
+                case Mustache_Tokenizer::T_INVERTED:
+                    $code .= $this->invertedSection(
+                        $node[Mustache_Tokenizer::NODES],
+                        $node[Mustache_Tokenizer::NAME],
+                        isset($node[Mustache_Tokenizer::FILTERS]) ? $node[Mustache_Tokenizer::FILTERS] : array(),
+                        $level
+                    );
+                    break;
+
+                case Mustache_Tokenizer::T_PARTIAL:
+                    $code .= $this->partial(
+                        $node[Mustache_Tokenizer::NAME],
+                        isset($node[Mustache_Tokenizer::DYNAMIC]) ? $node[Mustache_Tokenizer::DYNAMIC] : false,
+                        isset($node[Mustache_Tokenizer::INDENT]) ? $node[Mustache_Tokenizer::INDENT] : '',
+                        $level
+                    );
+                    break;
+
+                case Mustache_Tokenizer::T_PARENT:
+                    $code .= $this->parent(
+                        $node[Mustache_Tokenizer::NAME],
+                        isset($node[Mustache_Tokenizer::DYNAMIC]) ? $node[Mustache_Tokenizer::DYNAMIC] : false,
+                        isset($node[Mustache_Tokenizer::INDENT]) ? $node[Mustache_Tokenizer::INDENT] : '',
+                        $node[Mustache_Tokenizer::NODES],
+                        $level
+                    );
+                    break;
+
+                case Mustache_Tokenizer::T_BLOCK_ARG:
+                    $code .= $this->blockArg(
+                        $node[Mustache_Tokenizer::NODES],
+                        $node[Mustache_Tokenizer::NAME],
+                        $node[Mustache_Tokenizer::INDEX],
+                        $node[Mustache_Tokenizer::END],
+                        $node[Mustache_Tokenizer::OTAG],
+                        $node[Mustache_Tokenizer::CTAG],
+                        $level
+                    );
+                    break;
+
+                case Mustache_Tokenizer::T_BLOCK_VAR:
+                    $code .= $this->blockVar(
+                        $node[Mustache_Tokenizer::NODES],
+                        $node[Mustache_Tokenizer::NAME],
+                        $node[Mustache_Tokenizer::INDEX],
+                        $node[Mustache_Tokenizer::END],
+                        $node[Mustache_Tokenizer::OTAG],
+                        $node[Mustache_Tokenizer::CTAG],
+                        $level
+                    );
+                    break;
+
+                case Mustache_Tokenizer::T_COMMENT:
+                    break;
+
+                case Mustache_Tokenizer::T_ESCAPED:
+                case Mustache_Tokenizer::T_UNESCAPED:
+                case Mustache_Tokenizer::T_UNESCAPED_2:
+                    $code .= $this->variable(
+                        $node[Mustache_Tokenizer::NAME],
+                        isset($node[Mustache_Tokenizer::FILTERS]) ? $node[Mustache_Tokenizer::FILTERS] : array(),
+                        $node[Mustache_Tokenizer::TYPE] === Mustache_Tokenizer::T_ESCAPED,
+                        $level
+                    );
+                    break;
+
+                case Mustache_Tokenizer::T_TEXT:
+                    $code .= $this->text($node[Mustache_Tokenizer::VALUE], $level);
+                    break;
+
+                default:
+                    throw new Mustache_Exception_SyntaxException(sprintf('Unknown token type: %s', $node[Mustache_Tokenizer::TYPE]), $node);
+            }
+        }
+
+        return $code;
+    }
+
+    const KLASS = '<?php
+
+        class %s extends Mustache_Template
+        {
+            private $lambdaHelper;%s
+
+            public function renderInternal(Mustache_Context $context, $indent = \'\')
+            {
+                $this->lambdaHelper = new Mustache_LambdaHelper($this->mustache, $context);
+                $buffer = \'\';
+        %s
+
+                return $buffer;
+            }
+        %s
+        %s
+        }';
+
+    const KLASS_NO_LAMBDAS = '<?php
+
+        class %s extends Mustache_Template
+        {%s
+            public function renderInternal(Mustache_Context $context, $indent = \'\')
+            {
+                $buffer = \'\';
+        %s
+
+                return $buffer;
+            }
+        }';
+
+    const STRICT_CALLABLE = 'protected $strictCallables = true;';
+
+    /**
+     * Generate Mustache Template class PHP source.
+     *
+     * @param array  $tree Parse tree of Mustache tokens
+     * @param string $name Mustache Template class name
+     *
+     * @return string Generated PHP source code
+     */
+    private function writeCode($tree, $name)
+    {
+        $code     = $this->walk($tree);
+        $sections = implode("\n", $this->sections);
+        $blocks   = implode("\n", $this->blocks);
+        $klass    = empty($this->sections) && empty($this->blocks) ? self::KLASS_NO_LAMBDAS : self::KLASS;
+
+        $callable = $this->strictCallables ? $this->prepare(self::STRICT_CALLABLE) : '';
+
+        return sprintf($this->prepare($klass, 0, false, true), $name, $callable, $code, $sections, $blocks);
+    }
+
+    const BLOCK_VAR = '
+        $blockFunction = $context->findInBlock(%s);
+        if (is_callable($blockFunction)) {
+            $buffer .= call_user_func($blockFunction, $context);
+        %s}
+    ';
+
+    const BLOCK_VAR_ELSE = '} else {%s';
+
+    /**
+     * Generate Mustache Template inheritance block variable PHP source.
+     *
+     * @param array  $nodes Array of child tokens
+     * @param string $id    Section name
+     * @param int    $start Section start offset
+     * @param int    $end   Section end offset
+     * @param string $otag  Current Mustache opening tag
+     * @param string $ctag  Current Mustache closing tag
+     * @param int    $level
+     *
+     * @return string Generated PHP source code
+     */
+    private function blockVar($nodes, $id, $start, $end, $otag, $ctag, $level)
+    {
+        $id = var_export($id, true);
+
+        $else = $this->walk($nodes, $level);
+        if ($else !== '') {
+            $else = sprintf($this->prepare(self::BLOCK_VAR_ELSE, $level + 1, false, true), $else);
+        }
+
+        return sprintf($this->prepare(self::BLOCK_VAR, $level), $id, $else);
+    }
+
+    const BLOCK_ARG = '%s => array($this, \'block%s\'),';
+
+    /**
+     * Generate Mustache Template inheritance block argument PHP source.
+     *
+     * @param array  $nodes Array of child tokens
+     * @param string $id    Section name
+     * @param int    $start Section start offset
+     * @param int    $end   Section end offset
+     * @param string $otag  Current Mustache opening tag
+     * @param string $ctag  Current Mustache closing tag
+     * @param int    $level
+     *
+     * @return string Generated PHP source code
+     */
+    private function blockArg($nodes, $id, $start, $end, $otag, $ctag, $level)
+    {
+        $key = $this->block($nodes);
+        $id = var_export($id, true);
+
+        return sprintf($this->prepare(self::BLOCK_ARG, $level), $id, $key);
+    }
+
+    const BLOCK_FUNCTION = '
+        public function block%s($context)
+        {
+            $indent = $buffer = \'\';%s
+
+            return $buffer;
+        }
+    ';
+
+    /**
+     * Generate Mustache Template inheritance block function PHP source.
+     *
+     * @param array $nodes Array of child tokens
+     *
+     * @return string key of new block function
+     */
+    private function block($nodes)
+    {
+        $code = $this->walk($nodes, 0);
+        $key = ucfirst(md5($code));
+
+        if (!isset($this->blocks[$key])) {
+            $this->blocks[$key] = sprintf($this->prepare(self::BLOCK_FUNCTION, 0), $key, $code);
+        }
+
+        return $key;
+    }
+
+    const SECTION_CALL = '
+        $value = $context->%s(%s);%s
+        $buffer .= $this->section%s($context, $indent, $value);
+    ';
+
+    const SECTION = '
+        private function section%s(Mustache_Context $context, $indent, $value)
+        {
+            $buffer = \'\';
+
+            if (%s) {
+                $source = %s;
+                $result = (string) call_user_func($value, $source, %s);
+                if (strpos($result, \'{{\') === false) {
+                    $buffer .= $result;
+                } else {
+                    $buffer .= $this->mustache
+                        ->loadLambda($result%s)
+                        ->renderInternal($context);
+                }
+            } elseif (!empty($value)) {
+                $values = $this->isIterable($value) ? $value : array($value);
+                foreach ($values as $value) {
+                    $context->push($value);
+                    %s
+                    $context->pop();
+                }
+            }
+
+            return $buffer;
+        }
+    ';
+
+    /**
+     * Generate Mustache Template section PHP source.
+     *
+     * @param array    $nodes   Array of child tokens
+     * @param string   $id      Section name
+     * @param string[] $filters Array of filters
+     * @param int      $start   Section start offset
+     * @param int      $end     Section end offset
+     * @param string   $otag    Current Mustache opening tag
+     * @param string   $ctag    Current Mustache closing tag
+     * @param int      $level
+     *
+     * @return string Generated section PHP source code
+     */
+    private function section($nodes, $id, $filters, $start, $end, $otag, $ctag, $level)
+    {
+        $source   = var_export(substr($this->source, $start, $end - $start), true);
+        $callable = $this->getCallable();
+
+        if ($otag !== '{{' || $ctag !== '}}') {
+            $delimTag = var_export(sprintf('{{= %s %s =}}', $otag, $ctag), true);
+            $helper = sprintf('$this->lambdaHelper->withDelimiters(%s)', $delimTag);
+            $delims = ', ' . $delimTag;
+        } else {
+            $helper = '$this->lambdaHelper';
+            $delims = '';
+        }
+
+        $key = ucfirst(md5($delims . "\n" . $source));
+
+        if (!isset($this->sections[$key])) {
+            $this->sections[$key] = sprintf($this->prepare(self::SECTION), $key, $callable, $source, $helper, $delims, $this->walk($nodes, 2));
+        }
+
+        $method  = $this->getFindMethod($id);
+        $id      = var_export($id, true);
+        $filters = $this->getFilters($filters, $level);
+
+        return sprintf($this->prepare(self::SECTION_CALL, $level), $method, $id, $filters, $key);
+    }
+
+    const INVERTED_SECTION = '
+        $value = $context->%s(%s);%s
+        if (empty($value)) {
+            %s
+        }
+    ';
+
+    /**
+     * Generate Mustache Template inverted section PHP source.
+     *
+     * @param array    $nodes   Array of child tokens
+     * @param string   $id      Section name
+     * @param string[] $filters Array of filters
+     * @param int      $level
+     *
+     * @return string Generated inverted section PHP source code
+     */
+    private function invertedSection($nodes, $id, $filters, $level)
+    {
+        $method  = $this->getFindMethod($id);
+        $id      = var_export($id, true);
+        $filters = $this->getFilters($filters, $level);
+
+        return sprintf($this->prepare(self::INVERTED_SECTION, $level), $method, $id, $filters, $this->walk($nodes, $level));
+    }
+
+    const DYNAMIC_NAME = '$this->resolveValue($context->%s(%s), $context)';
+
+    /**
+     * Generate Mustache Template dynamic name resolution PHP source.
+     *
+     * @param string $id      Tag name
+     * @param bool   $dynamic True if the name is dynamic
+     *
+     * @return string Dynamic name resolution PHP source code
+     */
+    private function resolveDynamicName($id, $dynamic)
+    {
+        if (!$dynamic) {
+            return var_export($id, true);
+        }
+
+        $method = $this->getFindMethod($id);
+        $id     = ($method !== 'last') ? var_export($id, true) : '';
+
+        // TODO: filters?
+
+        return sprintf(self::DYNAMIC_NAME, $method, $id);
+    }
+
+    const PARTIAL_INDENT = ', $indent . %s';
+    const PARTIAL = '
+        if ($partial = $this->mustache->loadPartial(%s)) {
+            $buffer .= $partial->renderInternal($context%s);
+        }
+    ';
+
+    /**
+     * Generate Mustache Template partial call PHP source.
+     *
+     * @param string $id      Partial name
+     * @param bool   $dynamic Partial name is dynamic
+     * @param string $indent  Whitespace indent to apply to partial
+     * @param int    $level
+     *
+     * @return string Generated partial call PHP source code
+     */
+    private function partial($id, $dynamic, $indent, $level)
+    {
+        if ($indent !== '') {
+            $indentParam = sprintf(self::PARTIAL_INDENT, var_export($indent, true));
+        } else {
+            $indentParam = '';
+        }
+
+        return sprintf(
+            $this->prepare(self::PARTIAL, $level),
+            $this->resolveDynamicName($id, $dynamic),
+            $indentParam
+        );
+    }
+
+    const PARENT = '
+        if ($parent = $this->mustache->loadPartial(%s)) {
+            $context->pushBlockContext(array(%s
+            ));
+            $buffer .= $parent->renderInternal($context, $indent);
+            $context->popBlockContext();
+        }
+    ';
+
+    const PARENT_NO_CONTEXT = '
+        if ($parent = $this->mustache->loadPartial(%s)) {
+            $buffer .= $parent->renderInternal($context, $indent);
+        }
+    ';
+
+    /**
+     * Generate Mustache Template inheritance parent call PHP source.
+     *
+     * @param string $id       Parent tag name
+     * @param bool   $dynamic  Tag name is dynamic
+     * @param string $indent   Whitespace indent to apply to parent
+     * @param array  $children Child nodes
+     * @param int    $level
+     *
+     * @return string Generated PHP source code
+     */
+    private function parent($id, $dynamic, $indent, array $children, $level)
+    {
+        $realChildren = array_filter($children, array(__CLASS__, 'onlyBlockArgs'));
+        $partialName = $this->resolveDynamicName($id, $dynamic);
+
+        if (empty($realChildren)) {
+            return sprintf($this->prepare(self::PARENT_NO_CONTEXT, $level), $partialName);
+        }
+
+        return sprintf(
+            $this->prepare(self::PARENT, $level),
+            $partialName,
+            $this->walk($realChildren, $level + 1)
+        );
+    }
+
+    /**
+     * Helper method for filtering out non-block-arg tokens.
+     *
+     * @param array $node
+     *
+     * @return bool True if $node is a block arg token
+     */
+    private static function onlyBlockArgs(array $node)
+    {
+        return $node[Mustache_Tokenizer::TYPE] === Mustache_Tokenizer::T_BLOCK_ARG;
+    }
+
+    const VARIABLE = '
+        $value = $this->resolveValue($context->%s(%s), $context);%s
+        $buffer .= %s($value === null ? \'\' : %s);
+    ';
+
+    /**
+     * Generate Mustache Template variable interpolation PHP source.
+     *
+     * @param string   $id      Variable name
+     * @param string[] $filters Array of filters
+     * @param bool     $escape  Escape the variable value for output?
+     * @param int      $level
+     *
+     * @return string Generated variable interpolation PHP source
+     */
+    private function variable($id, $filters, $escape, $level)
+    {
+        $method  = $this->getFindMethod($id);
+        $id      = ($method !== 'last') ? var_export($id, true) : '';
+        $filters = $this->getFilters($filters, $level);
+        $value   = $escape ? $this->getEscape() : '$value';
+
+        return sprintf($this->prepare(self::VARIABLE, $level), $method, $id, $filters, $this->flushIndent(), $value);
+    }
+
+    const FILTER = '
+        $filter = $context->%s(%s);
+        if (!(%s)) {
+            throw new Mustache_Exception_UnknownFilterException(%s);
+        }
+        $value = call_user_func($filter, $value);%s
+    ';
+
+    /**
+     * Generate Mustache Template variable filtering PHP source.
+     *
+     * @param string[] $filters Array of filters
+     * @param int      $level
+     *
+     * @return string Generated filter PHP source
+     */
+    private function getFilters(array $filters, $level)
+    {
+        if (empty($filters)) {
+            return '';
+        }
+
+        $name     = array_shift($filters);
+        $method   = $this->getFindMethod($name);
+        $filter   = ($method !== 'last') ? var_export($name, true) : '';
+        $callable = $this->getCallable('$filter');
+        $msg      = var_export($name, true);
+
+        return sprintf($this->prepare(self::FILTER, $level), $method, $filter, $callable, $msg, $this->getFilters($filters, $level));
+    }
+
+    const LINE = '$buffer .= "\n";';
+    const TEXT = '$buffer .= %s%s;';
+
+    /**
+     * Generate Mustache Template output Buffer call PHP source.
+     *
+     * @param string $text
+     * @param int    $level
+     *
+     * @return string Generated output Buffer call PHP source
+     */
+    private function text($text, $level)
+    {
+        $indentNextLine = (substr($text, -1) === "\n");
+        $code = sprintf($this->prepare(self::TEXT, $level), $this->flushIndent(), var_export($text, true));
+        $this->indentNextLine = $indentNextLine;
+
+        return $code;
+    }
+
+    /**
+     * Prepare PHP source code snippet for output.
+     *
+     * @param string $text
+     * @param int    $bonus          Additional indent level (default: 0)
+     * @param bool   $prependNewline Prepend a newline to the snippet? (default: true)
+     * @param bool   $appendNewline  Append a newline to the snippet? (default: false)
+     *
+     * @return string PHP source code snippet
+     */
+    private function prepare($text, $bonus = 0, $prependNewline = true, $appendNewline = false)
+    {
+        $text = ($prependNewline ? "\n" : '') . trim($text);
+        if ($prependNewline) {
+            $bonus++;
+        }
+        if ($appendNewline) {
+            $text .= "\n";
+        }
+
+        return preg_replace("/\n( {8})?/", "\n" . str_repeat(' ', $bonus * 4), $text);
+    }
+
+    const DEFAULT_ESCAPE = 'htmlspecialchars(%s, %s, %s)';
+    const CUSTOM_ESCAPE  = 'call_user_func($this->mustache->getEscape(), %s)';
+
+    /**
+     * Get the current escaper.
+     *
+     * @param string $value (default: '$value')
+     *
+     * @return string Either a custom callback, or an inline call to `htmlspecialchars`
+     */
+    private function getEscape($value = '$value')
+    {
+        if ($this->customEscape) {
+            return sprintf(self::CUSTOM_ESCAPE, $value);
+        }
+
+        return sprintf(self::DEFAULT_ESCAPE, $value, var_export($this->entityFlags, true), var_export($this->charset, true));
+    }
+
+    /**
+     * Select the appropriate Context `find` method for a given $id.
+     *
+     * The return value will be one of `find`, `findDot`, `findAnchoredDot` or `last`.
+     *
+     * @see Mustache_Context::find
+     * @see Mustache_Context::findDot
+     * @see Mustache_Context::last
+     *
+     * @param string $id Variable name
+     *
+     * @return string `find` method name
+     */
+    private function getFindMethod($id)
+    {
+        if ($id === '.') {
+            return 'last';
+        }
+
+        if (isset($this->pragmas[Mustache_Engine::PRAGMA_ANCHORED_DOT]) && $this->pragmas[Mustache_Engine::PRAGMA_ANCHORED_DOT]) {
+            if (substr($id, 0, 1) === '.') {
+                return 'findAnchoredDot';
+            }
+        }
+
+        if (strpos($id, '.') === false) {
+            return 'find';
+        }
+
+        return 'findDot';
+    }
+
+    const IS_CALLABLE        = '!is_string(%s) && is_callable(%s)';
+    const STRICT_IS_CALLABLE = 'is_object(%s) && is_callable(%s)';
+
+    /**
+     * Helper function to compile strict vs lax "is callable" logic.
+     *
+     * @param string $variable (default: '$value')
+     *
+     * @return string "is callable" logic
+     */
+    private function getCallable($variable = '$value')
+    {
+        $tpl = $this->strictCallables ? self::STRICT_IS_CALLABLE : self::IS_CALLABLE;
+
+        return sprintf($tpl, $variable, $variable);
+    }
+
+    const LINE_INDENT = '$indent . ';
+
+    /**
+     * Get the current $indent prefix to write to the buffer.
+     *
+     * @return string "$indent . " or ""
+     */
+    private function flushIndent()
+    {
+        if (!$this->indentNextLine) {
+            return '';
+        }
+
+        $this->indentNextLine = false;
+
+        return self::LINE_INDENT;
+    }
+}
diff --git a/Mustache/Context.php b/Mustache/Context.php
index 7bc75719..69c02e01 100644
--- a/Mustache/Context.php
+++ b/Mustache/Context.php
@@ -1,149 +1,242 @@
-<?php

-

-/*

- * This file is part of Mustache.php.

- *

- * (c) 2012 Justin Hileman

- *

- * For the full copyright and license information, please view the LICENSE

- * file that was distributed with this source code.

- */

-

-/**

- * Mustache Template rendering Context.

- */

-class Mustache_Context

-{

-    private $stack = array();

-

-    /**

-     * Mustache rendering Context constructor.

-     *

-     * @param mixed $context Default rendering context (default: null)

-     */

-    public function __construct($context = null)

-    {

-        if ($context !== null) {

-            $this->stack = array($context);

-        }

-    }

-

-    /**

-     * Push a new Context frame onto the stack.

-     *

-     * @param mixed $value Object or array to use for context

-     */

-    public function push($value)

-    {

-        array_push($this->stack, $value);

-    }

-

-    /**

-     * Pop the last Context frame from the stack.

-     *

-     * @return mixed Last Context frame (object or array)

-     */

-    public function pop()

-    {

-        return array_pop($this->stack);

-    }

-

-    /**

-     * Get the last Context frame.

-     *

-     * @return mixed Last Context frame (object or array)

-     */

-    public function last()

-    {

-        return end($this->stack);

-    }

-

-    /**

-     * Find a variable in the Context stack.

-     *

-     * Starting with the last Context frame (the context of the innermost section), and working back to the top-level

-     * rendering context, look for a variable with the given name:

-     *

-     *  * If the Context frame is an associative array which contains the key $id, returns the value of that element.

-     *  * If the Context frame is an object, this will check first for a public method, then a public property named

-     *    $id. Failing both of these, it will try `__isset` and `__get` magic methods.

-     *  * If a value named $id is not found in any Context frame, returns an empty string.

-     *

-     * @param string $id Variable name

-     *

-     * @return mixed Variable value, or '' if not found

-     */

-    public function find($id)

-    {

-        return $this->findVariableInStack($id, $this->stack);

-    }

-

-    /**

-     * Find a 'dot notation' variable in the Context stack.

-     *

-     * Note that dot notation traversal bubbles through scope differently than the regular find method. After finding

-     * the initial chunk of the dotted name, each subsequent chunk is searched for only within the value of the previous

-     * result. For example, given the following context stack:

-     *

-     *     $data = array(

-     *         'name' => 'Fred',

-     *         'child' => array(

-     *             'name' => 'Bob'

-     *         ),

-     *     );

-     *

-     * ... and the Mustache following template:

-     *

-     *     {{ child.name }}

-     *

-     * ... the `name` value is only searched for within the `child` value of the global Context, not within parent

-     * Context frames.

-     *

-     * @param string $id Dotted variable selector

-     *

-     * @return mixed Variable value, or '' if not found

-     */

-    public function findDot($id)

-    {

-        $chunks = explode('.', $id);

-        $first  = array_shift($chunks);

-        $value  = $this->findVariableInStack($first, $this->stack);

-

-        foreach ($chunks as $chunk) {

-            if ($value === '') {

-                return $value;

-            }

-

-            $value = $this->findVariableInStack($chunk, array($value));

-        }

-

-        return $value;

-    }

-

-    /**

-     * Helper function to find a variable in the Context stack.

-     *

-     * @see Mustache_Context::find

-     *

-     * @param string $id    Variable name

-     * @param array  $stack Context stack

-     *

-     * @return mixed Variable value, or '' if not found

-     */

-    private function findVariableInStack($id, array $stack)

-    {

-        for ($i = count($stack) - 1; $i >= 0; $i--) {

-            if (is_object($stack[$i])) {

-                if (method_exists($stack[$i], $id)) {

-                    return $stack[$i]->$id();

-                } elseif (isset($stack[$i]->$id)) {

-                    return $stack[$i]->$id;

-                }

-            } elseif (is_array($stack[$i]) && array_key_exists($id, $stack[$i])) {

-                return $stack[$i][$id];

-            }

-        }

-

-        return '';

-    }

-}

+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Mustache Template rendering Context.
+ */
+class Mustache_Context
+{
+    private $stack      = array();
+    private $blockStack = array();
+
+    /**
+     * Mustache rendering Context constructor.
+     *
+     * @param mixed $context Default rendering context (default: null)
+     */
+    public function __construct($context = null)
+    {
+        if ($context !== null) {
+            $this->stack = array($context);
+        }
+    }
+
+    /**
+     * Push a new Context frame onto the stack.
+     *
+     * @param mixed $value Object or array to use for context
+     */
+    public function push($value)
+    {
+        array_push($this->stack, $value);
+    }
+
+    /**
+     * Push a new Context frame onto the block context stack.
+     *
+     * @param mixed $value Object or array to use for block context
+     */
+    public function pushBlockContext($value)
+    {
+        array_push($this->blockStack, $value);
+    }
+
+    /**
+     * Pop the last Context frame from the stack.
+     *
+     * @return mixed Last Context frame (object or array)
+     */
+    public function pop()
+    {
+        return array_pop($this->stack);
+    }
+
+    /**
+     * Pop the last block Context frame from the stack.
+     *
+     * @return mixed Last block Context frame (object or array)
+     */
+    public function popBlockContext()
+    {
+        return array_pop($this->blockStack);
+    }
+
+    /**
+     * Get the last Context frame.
+     *
+     * @return mixed Last Context frame (object or array)
+     */
+    public function last()
+    {
+        return end($this->stack);
+    }
+
+    /**
+     * Find a variable in the Context stack.
+     *
+     * Starting with the last Context frame (the context of the innermost section), and working back to the top-level
+     * rendering context, look for a variable with the given name:
+     *
+     *  * If the Context frame is an associative array which contains the key $id, returns the value of that element.
+     *  * If the Context frame is an object, this will check first for a public method, then a public property named
+     *    $id. Failing both of these, it will try `__isset` and `__get` magic methods.
+     *  * If a value named $id is not found in any Context frame, returns an empty string.
+     *
+     * @param string $id Variable name
+     *
+     * @return mixed Variable value, or '' if not found
+     */
+    public function find($id)
+    {
+        return $this->findVariableInStack($id, $this->stack);
+    }
+
+    /**
+     * Find a 'dot notation' variable in the Context stack.
+     *
+     * Note that dot notation traversal bubbles through scope differently than the regular find method. After finding
+     * the initial chunk of the dotted name, each subsequent chunk is searched for only within the value of the previous
+     * result. For example, given the following context stack:
+     *
+     *     $data = array(
+     *         'name' => 'Fred',
+     *         'child' => array(
+     *             'name' => 'Bob'
+     *         ),
+     *     );
+     *
+     * ... and the Mustache following template:
+     *
+     *     {{ child.name }}
+     *
+     * ... the `name` value is only searched for within the `child` value of the global Context, not within parent
+     * Context frames.
+     *
+     * @param string $id Dotted variable selector
+     *
+     * @return mixed Variable value, or '' if not found
+     */
+    public function findDot($id)
+    {
+        $chunks = explode('.', $id);
+        $first  = array_shift($chunks);
+        $value  = $this->findVariableInStack($first, $this->stack);
+
+        foreach ($chunks as $chunk) {
+            if ($value === '') {
+                return $value;
+            }
+
+            $value = $this->findVariableInStack($chunk, array($value));
+        }
+
+        return $value;
+    }
+
+    /**
+     * Find an 'anchored dot notation' variable in the Context stack.
+     *
+     * This is the same as findDot(), except it looks in the top of the context
+     * stack for the first value, rather than searching the whole context stack
+     * and starting from there.
+     *
+     * @see Mustache_Context::findDot
+     *
+     * @throws Mustache_Exception_InvalidArgumentException if given an invalid anchored dot $id
+     *
+     * @param string $id Dotted variable selector
+     *
+     * @return mixed Variable value, or '' if not found
+     */
+    public function findAnchoredDot($id)
+    {
+        $chunks = explode('.', $id);
+        $first  = array_shift($chunks);
+        if ($first !== '') {
+            throw new Mustache_Exception_InvalidArgumentException(sprintf('Unexpected id for findAnchoredDot: %s', $id));
+        }
+
+        $value  = $this->last();
+
+        foreach ($chunks as $chunk) {
+            if ($value === '') {
+                return $value;
+            }
+
+            $value = $this->findVariableInStack($chunk, array($value));
+        }
+
+        return $value;
+    }
+
+    /**
+     * Find an argument in the block context stack.
+     *
+     * @param string $id
+     *
+     * @return mixed Variable value, or '' if not found
+     */
+    public function findInBlock($id)
+    {
+        foreach ($this->blockStack as $context) {
+            if (array_key_exists($id, $context)) {
+                return $context[$id];
+            }
+        }
+
+        return '';
+    }
+
+    /**
+     * Helper function to find a variable in the Context stack.
+     *
+     * @see Mustache_Context::find
+     *
+     * @param string $id    Variable name
+     * @param array  $stack Context stack
+     *
+     * @return mixed Variable value, or '' if not found
+     */
+    private function findVariableInStack($id, array $stack)
+    {
+        for ($i = count($stack) - 1; $i >= 0; $i--) {
+            $frame = &$stack[$i];
+
+            switch (gettype($frame)) {
+                case 'object':
+                    if (!($frame instanceof Closure)) {
+                        // Note that is_callable() *will not work here*
+                        // See https://github.com/bobthecow/mustache.php/wiki/Magic-Methods
+                        if (method_exists($frame, $id)) {
+                            return $frame->$id();
+                        }
+
+                        if (isset($frame->$id)) {
+                            return $frame->$id;
+                        }
+
+                        if ($frame instanceof ArrayAccess && isset($frame[$id])) {
+                            return $frame[$id];
+                        }
+                    }
+                    break;
+
+                case 'array':
+                    if (array_key_exists($id, $frame)) {
+                        return $frame[$id];
+                    }
+                    break;
+            }
+        }
+
+        return '';
+    }
+}
diff --git a/Mustache/Engine.php b/Mustache/Engine.php
index e1f6b8cf..7a31ac03 100644
--- a/Mustache/Engine.php
+++ b/Mustache/Engine.php
@@ -1,591 +1,831 @@
-<?php

-

-/*

- * This file is part of Mustache.php.

- *

- * (c) 2012 Justin Hileman

- *

- * For the full copyright and license information, please view the LICENSE

- * file that was distributed with this source code.

- */

-

-/**

- * A Mustache implementation in PHP.

- *

- * {@link http://defunkt.github.com/mustache}

- *

- * Mustache is a framework-agnostic logic-less templating language. It enforces separation of view

- * logic from template files. In fact, it is not even possible to embed logic in the template.

- *

- * This is very, very rad.

- *

- * @author Justin Hileman {@link http://justinhileman.com}

- */

-class Mustache_Engine

-{

-    const VERSION      = '2.0.2';

-    const SPEC_VERSION = '1.1.2';

-

-    // Template cache

-    private $templates = array();

-

-    // Environment

-    private $templateClassPrefix = '__Mustache_';

-    private $cache = null;

-    private $loader;

-    private $partialsLoader;

-    private $helpers;

-    private $escape;

-    private $charset = 'UTF-8';

-

-    /**

-     * Mustache class constructor.

-     *

-     * Passing an $options array allows overriding certain Mustache options during instantiation:

-     *

-     *     $options = array(

-     *         // The class prefix for compiled templates. Defaults to '__Mustache_'

-     *         'template_class_prefix' => '__MyTemplates_',

-     *

-     *         // A cache directory for compiled templates. Mustache will not cache templates unless this is set

-     *         'cache' => dirname(__FILE__).'/tmp/cache/mustache',

-     *

-     *         // A Mustache template loader instance. Uses a StringLoader if not specified

-     *         'loader' => new Mustache_Loader_FilesystemLoader(dirname(__FILE__).'/views'),

-     *

-     *         // A Mustache loader instance for partials.

-     *         'partials_loader' => new Mustache_Loader_FilesystemLoader(dirname(__FILE__).'/views/partials'),

-     *

-     *         // An array of Mustache partials. Useful for quick-and-dirty string template loading, but not as

-     *         // efficient or lazy as a Filesystem (or database) loader.

-     *         'partials' => array('foo' => file_get_contents(dirname(__FILE__).'/views/partials/foo.mustache')),

-     *

-     *         // An array of 'helpers'. Helpers can be global variables or objects, closures (e.g. for higher order

-     *         // sections), or any other valid Mustache context value. They will be prepended to the context stack,

-     *         // so they will be available in any template loaded by this Mustache instance.

-     *         'helpers' => array('i18n' => function($text) {

-     *              // do something translatey here...

-     *          }),

-     *

-     *         // An 'escape' callback, responsible for escaping double-mustache variables.

-     *         'escape' => function($value) {

-     *             return htmlspecialchars($buffer, ENT_COMPAT, 'UTF-8');

-     *         },

-     *

-     *         // character set for `htmlspecialchars`. Defaults to 'UTF-8'

-     *         'charset' => 'ISO-8859-1',

-     *     );

-     *

-     * @param array $options (default: array())

-     */

-    public function __construct(array $options = array())

-    {

-        if (isset($options['template_class_prefix'])) {

-            $this->templateClassPrefix = $options['template_class_prefix'];

-        }

-

-        if (isset($options['cache'])) {

-            $this->cache = $options['cache'];

-        }

-

-        if (isset($options['loader'])) {

-            $this->setLoader($options['loader']);

-        }

-

-        if (isset($options['partials_loader'])) {

-            $this->setPartialsLoader($options['partials_loader']);

-        }

-

-        if (isset($options['partials'])) {

-            $this->setPartials($options['partials']);

-        }

-

-        if (isset($options['helpers'])) {

-            $this->setHelpers($options['helpers']);

-        }

-

-        if (isset($options['escape'])) {

-            if (!is_callable($options['escape'])) {

-                throw new InvalidArgumentException('Mustache Constructor "escape" option must be callable');

-            }

-

-            $this->escape = $options['escape'];

-        }

-

-        if (isset($options['charset'])) {

-            $this->charset = $options['charset'];

-        }

-    }

-

-    /**

-     * Shortcut 'render' invocation.

-     *

-     * Equivalent to calling `$mustache->loadTemplate($template)->render($data);`

-     *

-     * @see Mustache_Engine::loadTemplate

-     * @see Mustache_Template::render

-     *

-     * @param string $template

-     * @param mixed  $data

-     *

-     * @return string Rendered template

-     */

-    public function render($template, $data)

-    {

-        return $this->loadTemplate($template)->render($data);

-    }

-

-    /**

-     * Get the current Mustache escape callback.

-     *

-     * @return mixed Callable or null

-     */

-    public function getEscape()

-    {

-        return $this->escape;

-    }

-

-    /**

-     * Get the current Mustache character set.

-     *

-     * @return string

-     */

-    public function getCharset()

-    {

-        return $this->charset;

-    }

-

-    /**

-     * Set the Mustache template Loader instance.

-     *

-     * @param Mustache_Loader $loader

-     */

-    public function setLoader(Mustache_Loader $loader)

-    {

-        $this->loader = $loader;

-    }

-

-    /**

-     * Get the current Mustache template Loader instance.

-     *

-     * If no Loader instance has been explicitly specified, this method will instantiate and return

-     * a StringLoader instance.

-     *

-     * @return Mustache_Loader

-     */

-    public function getLoader()

-    {

-        if (!isset($this->loader)) {

-            $this->loader = new Mustache_Loader_StringLoader;

-        }

-

-        return $this->loader;

-    }

-

-    /**

-     * Set the Mustache partials Loader instance.

-     *

-     * @param Mustache_Loader $partialsLoader

-     */

-    public function setPartialsLoader(Mustache_Loader $partialsLoader)

-    {

-        $this->partialsLoader = $partialsLoader;

-    }

-

-    /**

-     * Get the current Mustache partials Loader instance.

-     *

-     * If no Loader instance has been explicitly specified, this method will instantiate and return

-     * an ArrayLoader instance.

-     *

-     * @return Mustache_Loader

-     */

-    public function getPartialsLoader()

-    {

-        if (!isset($this->partialsLoader)) {

-            $this->partialsLoader = new Mustache_Loader_ArrayLoader;

-        }

-

-        return $this->partialsLoader;

-    }

-

-    /**

-     * Set partials for the current partials Loader instance.

-     *

-     * @throws RuntimeException If the current Loader instance is immutable

-     *

-     * @param array $partials (default: array())

-     */

-    public function setPartials(array $partials = array())

-    {

-        $loader = $this->getPartialsLoader();

-        if (!$loader instanceof Mustache_Loader_MutableLoader) {

-            throw new RuntimeException('Unable to set partials on an immutable Mustache Loader instance');

-        }

-

-        $loader->setTemplates($partials);

-    }

-

-    /**

-     * Set an array of Mustache helpers.

-     *

-     * An array of 'helpers'. Helpers can be global variables or objects, closures (e.g. for higher order sections), or

-     * any other valid Mustache context value. They will be prepended to the context stack, so they will be available in

-     * any template loaded by this Mustache instance.

-     *

-     * @throws InvalidArgumentException if $helpers is not an array or Traversable

-     *

-     * @param array|Traversable $helpers

-     */

-    public function setHelpers($helpers)

-    {

-        if (!is_array($helpers) && !$helpers instanceof Traversable) {

-            throw new InvalidArgumentException('setHelpers expects an array of helpers');

-        }

-

-        $this->getHelpers()->clear();

-

-        foreach ($helpers as $name => $helper) {

-            $this->addHelper($name, $helper);

-        }

-    }

-

-    /**

-     * Get the current set of Mustache helpers.

-     *

-     * @see Mustache_Engine::setHelpers

-     *

-     * @return Mustache_HelperCollection

-     */

-    public function getHelpers()

-    {

-        if (!isset($this->helpers)) {

-            $this->helpers = new Mustache_HelperCollection;

-        }

-

-        return $this->helpers;

-    }

-

-    /**

-     * Add a new Mustache helper.

-     *

-     * @see Mustache_Engine::setHelpers

-     *

-     * @param string $name

-     * @param mixed  $helper

-     */

-    public function addHelper($name, $helper)

-    {

-        $this->getHelpers()->add($name, $helper);

-    }

-

-    /**

-     * Get a Mustache helper by name.

-     *

-     * @see Mustache_Engine::setHelpers

-     *

-     * @param string $name

-     *

-     * @return mixed Helper

-     */

-    public function getHelper($name)

-    {

-        return $this->getHelpers()->get($name);

-    }

-

-    /**

-     * Check whether this Mustache instance has a helper.

-     *

-     * @see Mustache_Engine::setHelpers

-     *

-     * @param string $name

-     *

-     * @return boolean True if the helper is present

-     */

-    public function hasHelper($name)

-    {

-        return $this->getHelpers()->has($name);

-    }

-

-    /**

-     * Remove a helper by name.

-     *

-     * @see Mustache_Engine::setHelpers

-     *

-     * @param string $name

-     */

-    public function removeHelper($name)

-    {

-        $this->getHelpers()->remove($name);

-    }

-

-    /**

-     * Set the Mustache Tokenizer instance.

-     *

-     * @param Mustache_Tokenizer $tokenizer

-     */

-    public function setTokenizer(Mustache_Tokenizer $tokenizer)

-    {

-        $this->tokenizer = $tokenizer;

-    }

-

-    /**

-     * Get the current Mustache Tokenizer instance.

-     *

-     * If no Tokenizer instance has been explicitly specified, this method will instantiate and return a new one.

-     *

-     * @return Mustache_Tokenizer

-     */

-    public function getTokenizer()

-    {

-        if (!isset($this->tokenizer)) {

-            $this->tokenizer = new Mustache_Tokenizer;

-        }

-

-        return $this->tokenizer;

-    }

-

-    /**

-     * Set the Mustache Parser instance.

-     *

-     * @param Mustache_Parser $parser

-     */

-    public function setParser(Mustache_Parser $parser)

-    {

-        $this->parser = $parser;

-    }

-

-    /**

-     * Get the current Mustache Parser instance.

-     *

-     * If no Parser instance has been explicitly specified, this method will instantiate and return a new one.

-     *

-     * @return Mustache_Parser

-     */

-    public function getParser()

-    {

-        if (!isset($this->parser)) {

-            $this->parser = new Mustache_Parser;

-        }

-

-        return $this->parser;

-    }

-

-    /**

-     * Set the Mustache Compiler instance.

-     *

-     * @param Mustache_Compiler $compiler

-     */

-    public function setCompiler(Mustache_Compiler $compiler)

-    {

-        $this->compiler = $compiler;

-    }

-

-    /**

-     * Get the current Mustache Compiler instance.

-     *

-     * If no Compiler instance has been explicitly specified, this method will instantiate and return a new one.

-     *

-     * @return Mustache_Compiler

-     */

-    public function getCompiler()

-    {

-        if (!isset($this->compiler)) {

-            $this->compiler = new Mustache_Compiler;

-        }

-

-        return $this->compiler;

-    }

-

-    /**

-     * Helper method to generate a Mustache template class.

-     *

-     * @param string $source

-     *

-     * @return string Mustache Template class name

-     */

-    public function getTemplateClassName($source)

-    {

-        return $this->templateClassPrefix . md5(sprintf(

-            'version:%s,escape:%s,charset:%s,source:%s',

-            self::VERSION,

-            isset($this->escape) ? 'custom' : 'default',

-            $this->charset,

-            $source

-        ));

-    }

-

-    /**

-     * Load a Mustache Template by name.

-     *

-     * @param string $name

-     *

-     * @return Mustache_Template

-     */

-    public function loadTemplate($name)

-    {

-        return $this->loadSource($this->getLoader()->load($name));

-    }

-

-    /**

-     * Load a Mustache partial Template by name.

-     *

-     * This is a helper method used internally by Template instances for loading partial templates. You can most likely

-     * ignore it completely.

-     *

-     * @param string $name

-     *

-     * @return Mustache_Template

-     */

-    public function loadPartial($name)

-    {

-        try {

-            return $this->loadSource($this->getPartialsLoader()->load($name));

-        } catch (InvalidArgumentException $e) {

-            // If the named partial cannot be found, return null.

-        }

-        return null;

-    }

-

-    /**

-     * Load a Mustache lambda Template by source.

-     *

-     * This is a helper method used by Template instances to generate subtemplates for Lambda sections. You can most

-     * likely ignore it completely.

-     *

-     * @param string $source

-     * @param string $delims (default: null)

-     *

-     * @return Mustache_Template

-     */

-    public function loadLambda($source, $delims = null)

-    {

-        if ($delims !== null) {

-            $source = $delims . "\n" . $source;

-        }

-

-        return $this->loadSource($source);

-    }

-

-    /**

-     * Instantiate and return a Mustache Template instance by source.

-     *

-     * @see Mustache_Engine::loadTemplate

-     * @see Mustache_Engine::loadPartial

-     * @see Mustache_Engine::loadLambda

-     *

-     * @param string $source

-     *

-     * @return Mustache_Template

-     */

-    private function loadSource($source)

-    {

-        $className = $this->getTemplateClassName($source);

-

-        if (!isset($this->templates[$className])) {

-            if (!class_exists($className, false)) {

-                if ($fileName = $this->getCacheFilename($source)) {

-                    if (!is_file($fileName)) {

-                        $this->writeCacheFile($fileName, $this->compile($source));

-                    }

-

-                    require_once $fileName;

-                } else {

-                    eval('?>'.$this->compile($source));

-                }

-            }

-

-            $this->templates[$className] = new $className($this);

-        }

-

-        return $this->templates[$className];

-    }

-

-    /**

-     * Helper method to tokenize a Mustache template.

-     *

-     * @see Mustache_Tokenizer::scan

-     *

-     * @param string $source

-     *

-     * @return array Tokens

-     */

-    private function tokenize($source)

-    {

-        return $this->getTokenizer()->scan($source);

-    }

-

-    /**

-     * Helper method to parse a Mustache template.

-     *

-     * @see Mustache_Parser::parse

-     *

-     * @param string $source

-     *

-     * @return array Token tree

-     */

-    private function parse($source)

-    {

-        return $this->getParser()->parse($this->tokenize($source));

-    }

-

-    /**

-     * Helper method to compile a Mustache template.

-     *

-     * @see Mustache_Compiler::compile

-     *

-     * @param string $source

-     *

-     * @return string generated Mustache template class code

-     */

-    private function compile($source)

-    {

-        $tree = $this->parse($source);

-        $name = $this->getTemplateClassName($source);

-

-        return $this->getCompiler()->compile($source, $tree, $name, isset($this->escape), $this->charset);

-    }

-

-    /**

-     * Helper method to generate a Mustache Template class cache filename.

-     *

-     * @param string $source

-     *

-     * @return string Mustache Template class cache filename

-     */

-    private function getCacheFilename($source)

-    {

-        if ($this->cache) {

-            return sprintf('%s/%s.php', $this->cache, $this->getTemplateClassName($source));

-        }

-        return false;

-    }

-

-    /**

-     * Helper method to dump a generated Mustache Template subclass to the file cache.

-     *

-     * @throws RuntimeException if unable to write to $fileName.

-     *

-     * @param string $fileName

-     * @param string $source

-     *

-     * @codeCoverageIgnore

-     */

-    private function writeCacheFile($fileName, $source)

-    {

-        if (!is_dir(dirname($fileName))) {

-            mkdir(dirname($fileName), 0777, true);

-        }

-

-        $tempFile = tempnam(dirname($fileName), basename($fileName));

-        if (false !== @file_put_contents($tempFile, $source)) {

-            if (@rename($tempFile, $fileName)) {

-                chmod($fileName, 0644);

-

-                return;

-            }

-        }

-

-        throw new RuntimeException(sprintf('Failed to write cache file "%s".', $fileName));

-    }

-}

+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * A Mustache implementation in PHP.
+ *
+ * {@link http://defunkt.github.com/mustache}
+ *
+ * Mustache is a framework-agnostic logic-less templating language. It enforces separation of view
+ * logic from template files. In fact, it is not even possible to embed logic in the template.
+ *
+ * This is very, very rad.
+ *
+ * @author Justin Hileman {@link http://justinhileman.com}
+ */
+class Mustache_Engine
+{
+    const VERSION      = '2.14.2';
+    const SPEC_VERSION = '1.3.0';
+
+    const PRAGMA_FILTERS       = 'FILTERS';
+    const PRAGMA_BLOCKS        = 'BLOCKS';
+    const PRAGMA_ANCHORED_DOT  = 'ANCHORED-DOT';
+    const PRAGMA_DYNAMIC_NAMES = 'DYNAMIC-NAMES';
+
+    // Known pragmas
+    private static $knownPragmas = array(
+        self::PRAGMA_FILTERS       => true,
+        self::PRAGMA_BLOCKS        => true,
+        self::PRAGMA_ANCHORED_DOT  => true,
+        self::PRAGMA_DYNAMIC_NAMES => true,
+    );
+
+    // Template cache
+    private $templates = array();
+
+    // Environment
+    private $templateClassPrefix = '__Mustache_';
+    private $cache;
+    private $lambdaCache;
+    private $cacheLambdaTemplates = false;
+    private $loader;
+    private $partialsLoader;
+    private $helpers;
+    private $escape;
+    private $entityFlags = ENT_COMPAT;
+    private $charset = 'UTF-8';
+    private $logger;
+    private $strictCallables = false;
+    private $pragmas = array();
+    private $delimiters;
+
+    // Services
+    private $tokenizer;
+    private $parser;
+    private $compiler;
+
+    /**
+     * Mustache class constructor.
+     *
+     * Passing an $options array allows overriding certain Mustache options during instantiation:
+     *
+     *     $options = array(
+     *         // The class prefix for compiled templates. Defaults to '__Mustache_'.
+     *         'template_class_prefix' => '__MyTemplates_',
+     *
+     *         // A Mustache cache instance or a cache directory string for compiled templates.
+     *         // Mustache will not cache templates unless this is set.
+     *         'cache' => dirname(__FILE__).'/tmp/cache/mustache',
+     *
+     *         // Override default permissions for cache files. Defaults to using the system-defined umask. It is
+     *         // *strongly* recommended that you configure your umask properly rather than overriding permissions here.
+     *         'cache_file_mode' => 0666,
+     *
+     *         // Optionally, enable caching for lambda section templates. This is generally not recommended, as lambda
+     *         // sections are often too dynamic to benefit from caching.
+     *         'cache_lambda_templates' => true,
+     *
+     *         // Customize the tag delimiters used by this engine instance. Note that overriding here changes the
+     *         // delimiters used to parse all templates and partials loaded by this instance. To override just for a
+     *         // single template, use an inline "change delimiters" tag at the start of the template file:
+     *         //
+     *         //     {{=<% %>=}}
+     *         //
+     *         'delimiters' => '<% %>',
+     *
+     *         // A Mustache template loader instance. Uses a StringLoader if not specified.
+     *         'loader' => new Mustache_Loader_FilesystemLoader(dirname(__FILE__).'/views'),
+     *
+     *         // A Mustache loader instance for partials.
+     *         'partials_loader' => new Mustache_Loader_FilesystemLoader(dirname(__FILE__).'/views/partials'),
+     *
+     *         // An array of Mustache partials. Useful for quick-and-dirty string template loading, but not as
+     *         // efficient or lazy as a Filesystem (or database) loader.
+     *         'partials' => array('foo' => file_get_contents(dirname(__FILE__).'/views/partials/foo.mustache')),
+     *
+     *         // An array of 'helpers'. Helpers can be global variables or objects, closures (e.g. for higher order
+     *         // sections), or any other valid Mustache context value. They will be prepended to the context stack,
+     *         // so they will be available in any template loaded by this Mustache instance.
+     *         'helpers' => array('i18n' => function ($text) {
+     *             // do something translatey here...
+     *         }),
+     *
+     *         // An 'escape' callback, responsible for escaping double-mustache variables.
+     *         'escape' => function ($value) {
+     *             return htmlspecialchars($buffer, ENT_COMPAT, 'UTF-8');
+     *         },
+     *
+     *         // Type argument for `htmlspecialchars`.  Defaults to ENT_COMPAT.  You may prefer ENT_QUOTES.
+     *         'entity_flags' => ENT_QUOTES,
+     *
+     *         // Character set for `htmlspecialchars`. Defaults to 'UTF-8'. Use 'UTF-8'.
+     *         'charset' => 'ISO-8859-1',
+     *
+     *         // A Mustache Logger instance. No logging will occur unless this is set. Using a PSR-3 compatible
+     *         // logging library -- such as Monolog -- is highly recommended. A simple stream logger implementation is
+     *         // available as well:
+     *         'logger' => new Mustache_Logger_StreamLogger('php://stderr'),
+     *
+     *         // Only treat Closure instances and invokable classes as callable. If true, values like
+     *         // `array('ClassName', 'methodName')` and `array($classInstance, 'methodName')`, which are traditionally
+     *         // "callable" in PHP, are not called to resolve variables for interpolation or section contexts. This
+     *         // helps protect against arbitrary code execution when user input is passed directly into the template.
+     *         // This currently defaults to false, but will default to true in v3.0.
+     *         'strict_callables' => true,
+     *
+     *         // Enable pragmas across all templates, regardless of the presence of pragma tags in the individual
+     *         // templates.
+     *         'pragmas' => [Mustache_Engine::PRAGMA_FILTERS],
+     *     );
+     *
+     * @throws Mustache_Exception_InvalidArgumentException If `escape` option is not callable
+     *
+     * @param array $options (default: array())
+     */
+    public function __construct(array $options = array())
+    {
+        if (isset($options['template_class_prefix'])) {
+            if ((string) $options['template_class_prefix'] === '') {
+                throw new Mustache_Exception_InvalidArgumentException('Mustache Constructor "template_class_prefix" must not be empty');
+            }
+
+            $this->templateClassPrefix = $options['template_class_prefix'];
+        }
+
+        if (isset($options['cache'])) {
+            $cache = $options['cache'];
+
+            if (is_string($cache)) {
+                $mode  = isset($options['cache_file_mode']) ? $options['cache_file_mode'] : null;
+                $cache = new Mustache_Cache_FilesystemCache($cache, $mode);
+            }
+
+            $this->setCache($cache);
+        }
+
+        if (isset($options['cache_lambda_templates'])) {
+            $this->cacheLambdaTemplates = (bool) $options['cache_lambda_templates'];
+        }
+
+        if (isset($options['loader'])) {
+            $this->setLoader($options['loader']);
+        }
+
+        if (isset($options['partials_loader'])) {
+            $this->setPartialsLoader($options['partials_loader']);
+        }
+
+        if (isset($options['partials'])) {
+            $this->setPartials($options['partials']);
+        }
+
+        if (isset($options['helpers'])) {
+            $this->setHelpers($options['helpers']);
+        }
+
+        if (isset($options['escape'])) {
+            if (!is_callable($options['escape'])) {
+                throw new Mustache_Exception_InvalidArgumentException('Mustache Constructor "escape" option must be callable');
+            }
+
+            $this->escape = $options['escape'];
+        }
+
+        if (isset($options['entity_flags'])) {
+            $this->entityFlags = $options['entity_flags'];
+        }
+
+        if (isset($options['charset'])) {
+            $this->charset = $options['charset'];
+        }
+
+        if (isset($options['logger'])) {
+            $this->setLogger($options['logger']);
+        }
+
+        if (isset($options['strict_callables'])) {
+            $this->strictCallables = $options['strict_callables'];
+        }
+
+        if (isset($options['delimiters'])) {
+            $this->delimiters = $options['delimiters'];
+        }
+
+        if (isset($options['pragmas'])) {
+            foreach ($options['pragmas'] as $pragma) {
+                if (!isset(self::$knownPragmas[$pragma])) {
+                    throw new Mustache_Exception_InvalidArgumentException(sprintf('Unknown pragma: "%s".', $pragma));
+                }
+                $this->pragmas[$pragma] = true;
+            }
+        }
+    }
+
+    /**
+     * Shortcut 'render' invocation.
+     *
+     * Equivalent to calling `$mustache->loadTemplate($template)->render($context);`
+     *
+     * @see Mustache_Engine::loadTemplate
+     * @see Mustache_Template::render
+     *
+     * @param string $template
+     * @param mixed  $context  (default: array())
+     *
+     * @return string Rendered template
+     */
+    public function render($template, $context = array())
+    {
+        return $this->loadTemplate($template)->render($context);
+    }
+
+    /**
+     * Get the current Mustache escape callback.
+     *
+     * @return callable|null
+     */
+    public function getEscape()
+    {
+        return $this->escape;
+    }
+
+    /**
+     * Get the current Mustache entitity type to escape.
+     *
+     * @return int
+     */
+    public function getEntityFlags()
+    {
+        return $this->entityFlags;
+    }
+
+    /**
+     * Get the current Mustache character set.
+     *
+     * @return string
+     */
+    public function getCharset()
+    {
+        return $this->charset;
+    }
+
+    /**
+     * Get the current globally enabled pragmas.
+     *
+     * @return array
+     */
+    public function getPragmas()
+    {
+        return array_keys($this->pragmas);
+    }
+
+    /**
+     * Set the Mustache template Loader instance.
+     *
+     * @param Mustache_Loader $loader
+     */
+    public function setLoader(Mustache_Loader $loader)
+    {
+        $this->loader = $loader;
+    }
+
+    /**
+     * Get the current Mustache template Loader instance.
+     *
+     * If no Loader instance has been explicitly specified, this method will instantiate and return
+     * a StringLoader instance.
+     *
+     * @return Mustache_Loader
+     */
+    public function getLoader()
+    {
+        if (!isset($this->loader)) {
+            $this->loader = new Mustache_Loader_StringLoader();
+        }
+
+        return $this->loader;
+    }
+
+    /**
+     * Set the Mustache partials Loader instance.
+     *
+     * @param Mustache_Loader $partialsLoader
+     */
+    public function setPartialsLoader(Mustache_Loader $partialsLoader)
+    {
+        $this->partialsLoader = $partialsLoader;
+    }
+
+    /**
+     * Get the current Mustache partials Loader instance.
+     *
+     * If no Loader instance has been explicitly specified, this method will instantiate and return
+     * an ArrayLoader instance.
+     *
+     * @return Mustache_Loader
+     */
+    public function getPartialsLoader()
+    {
+        if (!isset($this->partialsLoader)) {
+            $this->partialsLoader = new Mustache_Loader_ArrayLoader();
+        }
+
+        return $this->partialsLoader;
+    }
+
+    /**
+     * Set partials for the current partials Loader instance.
+     *
+     * @throws Mustache_Exception_RuntimeException If the current Loader instance is immutable
+     *
+     * @param array $partials (default: array())
+     */
+    public function setPartials(array $partials = array())
+    {
+        if (!isset($this->partialsLoader)) {
+            $this->partialsLoader = new Mustache_Loader_ArrayLoader();
+        }
+
+        if (!$this->partialsLoader instanceof Mustache_Loader_MutableLoader) {
+            throw new Mustache_Exception_RuntimeException('Unable to set partials on an immutable Mustache Loader instance');
+        }
+
+        $this->partialsLoader->setTemplates($partials);
+    }
+
+    /**
+     * Set an array of Mustache helpers.
+     *
+     * An array of 'helpers'. Helpers can be global variables or objects, closures (e.g. for higher order sections), or
+     * any other valid Mustache context value. They will be prepended to the context stack, so they will be available in
+     * any template loaded by this Mustache instance.
+     *
+     * @throws Mustache_Exception_InvalidArgumentException if $helpers is not an array or Traversable
+     *
+     * @param array|Traversable $helpers
+     */
+    public function setHelpers($helpers)
+    {
+        if (!is_array($helpers) && !$helpers instanceof Traversable) {
+            throw new Mustache_Exception_InvalidArgumentException('setHelpers expects an array of helpers');
+        }
+
+        $this->getHelpers()->clear();
+
+        foreach ($helpers as $name => $helper) {
+            $this->addHelper($name, $helper);
+        }
+    }
+
+    /**
+     * Get the current set of Mustache helpers.
+     *
+     * @see Mustache_Engine::setHelpers
+     *
+     * @return Mustache_HelperCollection
+     */
+    public function getHelpers()
+    {
+        if (!isset($this->helpers)) {
+            $this->helpers = new Mustache_HelperCollection();
+        }
+
+        return $this->helpers;
+    }
+
+    /**
+     * Add a new Mustache helper.
+     *
+     * @see Mustache_Engine::setHelpers
+     *
+     * @param string $name
+     * @param mixed  $helper
+     */
+    public function addHelper($name, $helper)
+    {
+        $this->getHelpers()->add($name, $helper);
+    }
+
+    /**
+     * Get a Mustache helper by name.
+     *
+     * @see Mustache_Engine::setHelpers
+     *
+     * @param string $name
+     *
+     * @return mixed Helper
+     */
+    public function getHelper($name)
+    {
+        return $this->getHelpers()->get($name);
+    }
+
+    /**
+     * Check whether this Mustache instance has a helper.
+     *
+     * @see Mustache_Engine::setHelpers
+     *
+     * @param string $name
+     *
+     * @return bool True if the helper is present
+     */
+    public function hasHelper($name)
+    {
+        return $this->getHelpers()->has($name);
+    }
+
+    /**
+     * Remove a helper by name.
+     *
+     * @see Mustache_Engine::setHelpers
+     *
+     * @param string $name
+     */
+    public function removeHelper($name)
+    {
+        $this->getHelpers()->remove($name);
+    }
+
+    /**
+     * Set the Mustache Logger instance.
+     *
+     * @throws Mustache_Exception_InvalidArgumentException If logger is not an instance of Mustache_Logger or Psr\Log\LoggerInterface
+     *
+     * @param Mustache_Logger|Psr\Log\LoggerInterface $logger
+     */
+    public function setLogger($logger = null)
+    {
+        if ($logger !== null && !($logger instanceof Mustache_Logger || is_a($logger, 'Psr\\Log\\LoggerInterface'))) {
+            throw new Mustache_Exception_InvalidArgumentException('Expected an instance of Mustache_Logger or Psr\\Log\\LoggerInterface.');
+        }
+
+        if ($this->getCache()->getLogger() === null) {
+            $this->getCache()->setLogger($logger);
+        }
+
+        $this->logger = $logger;
+    }
+
+    /**
+     * Get the current Mustache Logger instance.
+     *
+     * @return Mustache_Logger|Psr\Log\LoggerInterface
+     */
+    public function getLogger()
+    {
+        return $this->logger;
+    }
+
+    /**
+     * Set the Mustache Tokenizer instance.
+     *
+     * @param Mustache_Tokenizer $tokenizer
+     */
+    public function setTokenizer(Mustache_Tokenizer $tokenizer)
+    {
+        $this->tokenizer = $tokenizer;
+    }
+
+    /**
+     * Get the current Mustache Tokenizer instance.
+     *
+     * If no Tokenizer instance has been explicitly specified, this method will instantiate and return a new one.
+     *
+     * @return Mustache_Tokenizer
+     */
+    public function getTokenizer()
+    {
+        if (!isset($this->tokenizer)) {
+            $this->tokenizer = new Mustache_Tokenizer();
+        }
+
+        return $this->tokenizer;
+    }
+
+    /**
+     * Set the Mustache Parser instance.
+     *
+     * @param Mustache_Parser $parser
+     */
+    public function setParser(Mustache_Parser $parser)
+    {
+        $this->parser = $parser;
+    }
+
+    /**
+     * Get the current Mustache Parser instance.
+     *
+     * If no Parser instance has been explicitly specified, this method will instantiate and return a new one.
+     *
+     * @return Mustache_Parser
+     */
+    public function getParser()
+    {
+        if (!isset($this->parser)) {
+            $this->parser = new Mustache_Parser();
+        }
+
+        return $this->parser;
+    }
+
+    /**
+     * Set the Mustache Compiler instance.
+     *
+     * @param Mustache_Compiler $compiler
+     */
+    public function setCompiler(Mustache_Compiler $compiler)
+    {
+        $this->compiler = $compiler;
+    }
+
+    /**
+     * Get the current Mustache Compiler instance.
+     *
+     * If no Compiler instance has been explicitly specified, this method will instantiate and return a new one.
+     *
+     * @return Mustache_Compiler
+     */
+    public function getCompiler()
+    {
+        if (!isset($this->compiler)) {
+            $this->compiler = new Mustache_Compiler();
+        }
+
+        return $this->compiler;
+    }
+
+    /**
+     * Set the Mustache Cache instance.
+     *
+     * @param Mustache_Cache $cache
+     */
+    public function setCache(Mustache_Cache $cache)
+    {
+        if (isset($this->logger) && $cache->getLogger() === null) {
+            $cache->setLogger($this->getLogger());
+        }
+
+        $this->cache = $cache;
+    }
+
+    /**
+     * Get the current Mustache Cache instance.
+     *
+     * If no Cache instance has been explicitly specified, this method will instantiate and return a new one.
+     *
+     * @return Mustache_Cache
+     */
+    public function getCache()
+    {
+        if (!isset($this->cache)) {
+            $this->setCache(new Mustache_Cache_NoopCache());
+        }
+
+        return $this->cache;
+    }
+
+    /**
+     * Get the current Lambda Cache instance.
+     *
+     * If 'cache_lambda_templates' is enabled, this is the default cache instance. Otherwise, it is a NoopCache.
+     *
+     * @see Mustache_Engine::getCache
+     *
+     * @return Mustache_Cache
+     */
+    protected function getLambdaCache()
+    {
+        if ($this->cacheLambdaTemplates) {
+            return $this->getCache();
+        }
+
+        if (!isset($this->lambdaCache)) {
+            $this->lambdaCache = new Mustache_Cache_NoopCache();
+        }
+
+        return $this->lambdaCache;
+    }
+
+    /**
+     * Helper method to generate a Mustache template class.
+     *
+     * This method must be updated any time options are added which make it so
+     * the same template could be parsed and compiled multiple different ways.
+     *
+     * @param string|Mustache_Source $source
+     *
+     * @return string Mustache Template class name
+     */
+    public function getTemplateClassName($source)
+    {
+        // For the most part, adding a new option here should do the trick.
+        //
+        // Pick a value here which is unique for each possible way the template
+        // could be compiled... but not necessarily unique per option value. See
+        // escape below, which only needs to differentiate between 'custom' and
+        // 'default' escapes.
+        //
+        // Keep this list in alphabetical order :)
+        $chunks = array(
+            'charset'         => $this->charset,
+            'delimiters'      => $this->delimiters ? $this->delimiters : '{{ }}',
+            'entityFlags'     => $this->entityFlags,
+            'escape'          => isset($this->escape) ? 'custom' : 'default',
+            'key'             => ($source instanceof Mustache_Source) ? $source->getKey() : 'source',
+            'pragmas'         => $this->getPragmas(),
+            'strictCallables' => $this->strictCallables,
+            'version'         => self::VERSION,
+        );
+
+        $key = json_encode($chunks);
+
+        // Template Source instances have already provided their own source key. For strings, just include the whole
+        // source string in the md5 hash.
+        if (!$source instanceof Mustache_Source) {
+            $key .= "\n" . $source;
+        }
+
+        return $this->templateClassPrefix . md5($key);
+    }
+
+    /**
+     * Load a Mustache Template by name.
+     *
+     * @param string $name
+     *
+     * @return Mustache_Template
+     */
+    public function loadTemplate($name)
+    {
+        return $this->loadSource($this->getLoader()->load($name));
+    }
+
+    /**
+     * Load a Mustache partial Template by name.
+     *
+     * This is a helper method used internally by Template instances for loading partial templates. You can most likely
+     * ignore it completely.
+     *
+     * @param string $name
+     *
+     * @return Mustache_Template
+     */
+    public function loadPartial($name)
+    {
+        try {
+            if (isset($this->partialsLoader)) {
+                $loader = $this->partialsLoader;
+            } elseif (isset($this->loader) && !$this->loader instanceof Mustache_Loader_StringLoader) {
+                $loader = $this->loader;
+            } else {
+                throw new Mustache_Exception_UnknownTemplateException($name);
+            }
+
+            return $this->loadSource($loader->load($name));
+        } catch (Mustache_Exception_UnknownTemplateException $e) {
+            // If the named partial cannot be found, log then return null.
+            $this->log(
+                Mustache_Logger::WARNING,
+                'Partial not found: "{name}"',
+                array('name' => $e->getTemplateName())
+            );
+        }
+    }
+
+    /**
+     * Load a Mustache lambda Template by source.
+     *
+     * This is a helper method used by Template instances to generate subtemplates for Lambda sections. You can most
+     * likely ignore it completely.
+     *
+     * @param string $source
+     * @param string $delims (default: null)
+     *
+     * @return Mustache_Template
+     */
+    public function loadLambda($source, $delims = null)
+    {
+        if ($delims !== null) {
+            $source = $delims . "\n" . $source;
+        }
+
+        return $this->loadSource($source, $this->getLambdaCache());
+    }
+
+    /**
+     * Instantiate and return a Mustache Template instance by source.
+     *
+     * Optionally provide a Mustache_Cache instance. This is used internally by Mustache_Engine::loadLambda to respect
+     * the 'cache_lambda_templates' configuration option.
+     *
+     * @see Mustache_Engine::loadTemplate
+     * @see Mustache_Engine::loadPartial
+     * @see Mustache_Engine::loadLambda
+     *
+     * @param string|Mustache_Source $source
+     * @param Mustache_Cache         $cache  (default: null)
+     *
+     * @return Mustache_Template
+     */
+    private function loadSource($source, Mustache_Cache $cache = null)
+    {
+        $className = $this->getTemplateClassName($source);
+
+        if (!isset($this->templates[$className])) {
+            if ($cache === null) {
+                $cache = $this->getCache();
+            }
+
+            if (!class_exists($className, false)) {
+                if (!$cache->load($className)) {
+                    $compiled = $this->compile($source);
+                    $cache->cache($className, $compiled);
+                }
+            }
+
+            $this->log(
+                Mustache_Logger::DEBUG,
+                'Instantiating template: "{className}"',
+                array('className' => $className)
+            );
+
+            $this->templates[$className] = new $className($this);
+        }
+
+        return $this->templates[$className];
+    }
+
+    /**
+     * Helper method to tokenize a Mustache template.
+     *
+     * @see Mustache_Tokenizer::scan
+     *
+     * @param string $source
+     *
+     * @return array Tokens
+     */
+    private function tokenize($source)
+    {
+        return $this->getTokenizer()->scan($source, $this->delimiters);
+    }
+
+    /**
+     * Helper method to parse a Mustache template.
+     *
+     * @see Mustache_Parser::parse
+     *
+     * @param string $source
+     *
+     * @return array Token tree
+     */
+    private function parse($source)
+    {
+        $parser = $this->getParser();
+        $parser->setPragmas($this->getPragmas());
+
+        return $parser->parse($this->tokenize($source));
+    }
+
+    /**
+     * Helper method to compile a Mustache template.
+     *
+     * @see Mustache_Compiler::compile
+     *
+     * @param string|Mustache_Source $source
+     *
+     * @return string generated Mustache template class code
+     */
+    private function compile($source)
+    {
+        $name = $this->getTemplateClassName($source);
+
+        $this->log(
+            Mustache_Logger::INFO,
+            'Compiling template to "{className}" class',
+            array('className' => $name)
+        );
+
+        if ($source instanceof Mustache_Source) {
+            $source = $source->getSource();
+        }
+        $tree = $this->parse($source);
+
+        $compiler = $this->getCompiler();
+        $compiler->setPragmas($this->getPragmas());
+
+        return $compiler->compile($source, $tree, $name, isset($this->escape), $this->charset, $this->strictCallables, $this->entityFlags);
+    }
+
+    /**
+     * Add a log record if logging is enabled.
+     *
+     * @param int    $level   The logging level
+     * @param string $message The log message
+     * @param array  $context The log context
+     */
+    private function log($level, $message, array $context = array())
+    {
+        if (isset($this->logger)) {
+            $this->logger->log($level, $message, $context);
+        }
+    }
+}
diff --git a/Mustache/Exception.php b/Mustache/Exception.php
new file mode 100644
index 00000000..d4001a9b
--- /dev/null
+++ b/Mustache/Exception.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * A Mustache Exception interface.
+ */
+interface Mustache_Exception
+{
+    // This space intentionally left blank.
+}
diff --git a/Mustache/Exception/InvalidArgumentException.php b/Mustache/Exception/InvalidArgumentException.php
new file mode 100644
index 00000000..becf2ed1
--- /dev/null
+++ b/Mustache/Exception/InvalidArgumentException.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Invalid argument exception.
+ */
+class Mustache_Exception_InvalidArgumentException extends InvalidArgumentException implements Mustache_Exception
+{
+    // This space intentionally left blank.
+}
diff --git a/Mustache/Exception/LogicException.php b/Mustache/Exception/LogicException.php
new file mode 100644
index 00000000..b2424d67
--- /dev/null
+++ b/Mustache/Exception/LogicException.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Logic exception.
+ */
+class Mustache_Exception_LogicException extends LogicException implements Mustache_Exception
+{
+    // This space intentionally left blank.
+}
diff --git a/Mustache/Exception/RuntimeException.php b/Mustache/Exception/RuntimeException.php
new file mode 100644
index 00000000..b6369f4b
--- /dev/null
+++ b/Mustache/Exception/RuntimeException.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Runtime exception.
+ */
+class Mustache_Exception_RuntimeException extends RuntimeException implements Mustache_Exception
+{
+    // This space intentionally left blank.
+}
diff --git a/Mustache/Exception/SyntaxException.php b/Mustache/Exception/SyntaxException.php
new file mode 100644
index 00000000..b1879a3d
--- /dev/null
+++ b/Mustache/Exception/SyntaxException.php
@@ -0,0 +1,41 @@
+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Mustache syntax exception.
+ */
+class Mustache_Exception_SyntaxException extends LogicException implements Mustache_Exception
+{
+    protected $token;
+
+    /**
+     * @param string    $msg
+     * @param array     $token
+     * @param Exception $previous
+     */
+    public function __construct($msg, array $token, Exception $previous = null)
+    {
+        $this->token = $token;
+        if (version_compare(PHP_VERSION, '5.3.0', '>=')) {
+            parent::__construct($msg, 0, $previous);
+        } else {
+            parent::__construct($msg); // @codeCoverageIgnore
+        }
+    }
+
+    /**
+     * @return array
+     */
+    public function getToken()
+    {
+        return $this->token;
+    }
+}
diff --git a/Mustache/Exception/UnknownFilterException.php b/Mustache/Exception/UnknownFilterException.php
new file mode 100644
index 00000000..0651c173
--- /dev/null
+++ b/Mustache/Exception/UnknownFilterException.php
@@ -0,0 +1,38 @@
+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Unknown filter exception.
+ */
+class Mustache_Exception_UnknownFilterException extends UnexpectedValueException implements Mustache_Exception
+{
+    protected $filterName;
+
+    /**
+     * @param string    $filterName
+     * @param Exception $previous
+     */
+    public function __construct($filterName, Exception $previous = null)
+    {
+        $this->filterName = $filterName;
+        $message = sprintf('Unknown filter: %s', $filterName);
+        if (version_compare(PHP_VERSION, '5.3.0', '>=')) {
+            parent::__construct($message, 0, $previous);
+        } else {
+            parent::__construct($message); // @codeCoverageIgnore
+        }
+    }
+
+    public function getFilterName()
+    {
+        return $this->filterName;
+    }
+}
diff --git a/Mustache/Exception/UnknownHelperException.php b/Mustache/Exception/UnknownHelperException.php
new file mode 100644
index 00000000..193be782
--- /dev/null
+++ b/Mustache/Exception/UnknownHelperException.php
@@ -0,0 +1,38 @@
+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Unknown helper exception.
+ */
+class Mustache_Exception_UnknownHelperException extends InvalidArgumentException implements Mustache_Exception
+{
+    protected $helperName;
+
+    /**
+     * @param string    $helperName
+     * @param Exception $previous
+     */
+    public function __construct($helperName, Exception $previous = null)
+    {
+        $this->helperName = $helperName;
+        $message = sprintf('Unknown helper: %s', $helperName);
+        if (version_compare(PHP_VERSION, '5.3.0', '>=')) {
+            parent::__construct($message, 0, $previous);
+        } else {
+            parent::__construct($message); // @codeCoverageIgnore
+        }
+    }
+
+    public function getHelperName()
+    {
+        return $this->helperName;
+    }
+}
diff --git a/Mustache/Exception/UnknownTemplateException.php b/Mustache/Exception/UnknownTemplateException.php
new file mode 100644
index 00000000..32a778a5
--- /dev/null
+++ b/Mustache/Exception/UnknownTemplateException.php
@@ -0,0 +1,38 @@
+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Unknown template exception.
+ */
+class Mustache_Exception_UnknownTemplateException extends InvalidArgumentException implements Mustache_Exception
+{
+    protected $templateName;
+
+    /**
+     * @param string    $templateName
+     * @param Exception $previous
+     */
+    public function __construct($templateName, Exception $previous = null)
+    {
+        $this->templateName = $templateName;
+        $message = sprintf('Unknown template: %s', $templateName);
+        if (version_compare(PHP_VERSION, '5.3.0', '>=')) {
+            parent::__construct($message, 0, $previous);
+        } else {
+            parent::__construct($message); // @codeCoverageIgnore
+        }
+    }
+
+    public function getTemplateName()
+    {
+        return $this->templateName;
+    }
+}
diff --git a/Mustache/HelperCollection.php b/Mustache/HelperCollection.php
index 92bcde4a..5d8f73c1 100644
--- a/Mustache/HelperCollection.php
+++ b/Mustache/HelperCollection.php
@@ -1,168 +1,172 @@
-<?php

-

-/*

- * This file is part of Mustache.php.

- *

- * (c) 2012 Justin Hileman

- *

- * For the full copyright and license information, please view the LICENSE

- * file that was distributed with this source code.

- */

-

-/**

- * A collection of helpers for a Mustache instance.

- */

-class Mustache_HelperCollection

-{

-    private $helpers = array();

-

-    /**

-     * Helper Collection constructor.

-     *

-     * Optionally accepts an array (or Traversable) of `$name => $helper` pairs.

-     *

-     * @throws InvalidArgumentException if the $helpers argument isn't an array or Traversable

-     *

-     * @param array|Traversable $helpers (default: null)

-     */

-    public function __construct($helpers = null)

-    {

-        if ($helpers !== null) {

-            if (!is_array($helpers) && !$helpers instanceof Traversable) {

-                throw new InvalidArgumentException('HelperCollection constructor expects an array of helpers');

-            }

-

-            foreach ($helpers as $name => $helper) {

-                $this->add($name, $helper);

-            }

-        }

-    }

-

-    /**

-     * Magic mutator.

-     *

-     * @see Mustache_HelperCollection::add

-     *

-     * @param string $name

-     * @param mixed  $helper

-     */

-    public function __set($name, $helper)

-    {

-        $this->add($name, $helper);

-    }

-

-    /**

-     * Add a helper to this collection.

-     *

-     * @param string $name

-     * @param mixed  $helper

-     */

-    public function add($name, $helper)

-    {

-        $this->helpers[$name] = $helper;

-    }

-

-    /**

-     * Magic accessor.

-     *

-     * @see Mustache_HelperCollection::get

-     *

-     * @param string $name

-     *

-     * @return mixed Helper

-     */

-    public function __get($name)

-    {

-        return $this->get($name);

-    }

-

-    /**

-     * Get a helper by name.

-     *

-     * @param string $name

-     *

-     * @return mixed Helper

-     */

-    public function get($name)

-    {

-        if (!$this->has($name)) {

-            throw new InvalidArgumentException('Unknown helper: '.$name);

-        }

-

-        return $this->helpers[$name];

-    }

-

-    /**

-     * Magic isset().

-     *

-     * @see Mustache_HelperCollection::has

-     *

-     * @param string $name

-     *

-     * @return boolean True if helper is present

-     */

-    public function __isset($name)

-    {

-        return $this->has($name);

-    }

-

-    /**

-     * Check whether a given helper is present in the collection.

-     *

-     * @param string $name

-     *

-     * @return boolean True if helper is present

-     */

-    public function has($name)

-    {

-        return array_key_exists($name, $this->helpers);

-    }

-

-    /**

-     * Magic unset().

-     *

-     * @see Mustache_HelperCollection::remove

-     *

-     * @param string $name

-     */

-    public function __unset($name)

-    {

-        $this->remove($name);

-    }

-

-    /**

-     * Check whether a given helper is present in the collection.

-     *

-     * @throws InvalidArgumentException if the requested helper is not present.

-     *

-     * @param string $name

-     */

-    public function remove($name)

-    {

-        if (!$this->has($name)) {

-            throw new InvalidArgumentException('Unknown helper: '.$name);

-        }

-

-        unset($this->helpers[$name]);

-    }

-

-    /**

-     * Clear the helper collection.

-     *

-     * Removes all helpers from this collection

-     */

-    public function clear()

-    {

-        $this->helpers = array();

-    }

-

-    /**

-     * Check whether the helper collection is empty.

-     *

-     * @return boolean True if the collection is empty

-     */

-    public function isEmpty()

-    {

-        return empty($this->helpers);

-    }

-}

+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * A collection of helpers for a Mustache instance.
+ */
+class Mustache_HelperCollection
+{
+    private $helpers = array();
+
+    /**
+     * Helper Collection constructor.
+     *
+     * Optionally accepts an array (or Traversable) of `$name => $helper` pairs.
+     *
+     * @throws Mustache_Exception_InvalidArgumentException if the $helpers argument isn't an array or Traversable
+     *
+     * @param array|Traversable $helpers (default: null)
+     */
+    public function __construct($helpers = null)
+    {
+        if ($helpers === null) {
+            return;
+        }
+
+        if (!is_array($helpers) && !$helpers instanceof Traversable) {
+            throw new Mustache_Exception_InvalidArgumentException('HelperCollection constructor expects an array of helpers');
+        }
+
+        foreach ($helpers as $name => $helper) {
+            $this->add($name, $helper);
+        }
+    }
+
+    /**
+     * Magic mutator.
+     *
+     * @see Mustache_HelperCollection::add
+     *
+     * @param string $name
+     * @param mixed  $helper
+     */
+    public function __set($name, $helper)
+    {
+        $this->add($name, $helper);
+    }
+
+    /**
+     * Add a helper to this collection.
+     *
+     * @param string $name
+     * @param mixed  $helper
+     */
+    public function add($name, $helper)
+    {
+        $this->helpers[$name] = $helper;
+    }
+
+    /**
+     * Magic accessor.
+     *
+     * @see Mustache_HelperCollection::get
+     *
+     * @param string $name
+     *
+     * @return mixed Helper
+     */
+    public function __get($name)
+    {
+        return $this->get($name);
+    }
+
+    /**
+     * Get a helper by name.
+     *
+     * @throws Mustache_Exception_UnknownHelperException If helper does not exist
+     *
+     * @param string $name
+     *
+     * @return mixed Helper
+     */
+    public function get($name)
+    {
+        if (!$this->has($name)) {
+            throw new Mustache_Exception_UnknownHelperException($name);
+        }
+
+        return $this->helpers[$name];
+    }
+
+    /**
+     * Magic isset().
+     *
+     * @see Mustache_HelperCollection::has
+     *
+     * @param string $name
+     *
+     * @return bool True if helper is present
+     */
+    public function __isset($name)
+    {
+        return $this->has($name);
+    }
+
+    /**
+     * Check whether a given helper is present in the collection.
+     *
+     * @param string $name
+     *
+     * @return bool True if helper is present
+     */
+    public function has($name)
+    {
+        return array_key_exists($name, $this->helpers);
+    }
+
+    /**
+     * Magic unset().
+     *
+     * @see Mustache_HelperCollection::remove
+     *
+     * @param string $name
+     */
+    public function __unset($name)
+    {
+        $this->remove($name);
+    }
+
+    /**
+     * Check whether a given helper is present in the collection.
+     *
+     * @throws Mustache_Exception_UnknownHelperException if the requested helper is not present
+     *
+     * @param string $name
+     */
+    public function remove($name)
+    {
+        if (!$this->has($name)) {
+            throw new Mustache_Exception_UnknownHelperException($name);
+        }
+
+        unset($this->helpers[$name]);
+    }
+
+    /**
+     * Clear the helper collection.
+     *
+     * Removes all helpers from this collection
+     */
+    public function clear()
+    {
+        $this->helpers = array();
+    }
+
+    /**
+     * Check whether the helper collection is empty.
+     *
+     * @return bool True if the collection is empty
+     */
+    public function isEmpty()
+    {
+        return empty($this->helpers);
+    }
+}
diff --git a/Mustache/LICENSE b/Mustache/LICENSE
index 63c95ace..e0aecc94 100644
--- a/Mustache/LICENSE
+++ b/Mustache/LICENSE
@@ -1,22 +1,21 @@
-Copyright (c) 2010 Justin Hileman
+The MIT License (MIT)
 
-Permission is hereby granted, free of charge, to any person
-obtaining a copy of this software and associated documentation
-files (the "Software"), to deal in the Software without
-restriction, including without limitation the rights to use,
-copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the
-Software is furnished to do so, subject to the following
-conditions:
+Copyright (c) 2010-2015 Justin Hileman
 
-The above copyright notice and this permission notice shall be
-included in all copies or substantial portions of the Software.
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
-OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
-HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
-FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
-OTHER DEALINGS IN THE SOFTWARE.
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
+OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/Mustache/LambdaHelper.php b/Mustache/LambdaHelper.php
new file mode 100644
index 00000000..e93dbfa3
--- /dev/null
+++ b/Mustache/LambdaHelper.php
@@ -0,0 +1,76 @@
+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Mustache Lambda Helper.
+ *
+ * Passed as the second argument to section lambdas (higher order sections),
+ * giving them access to a `render` method for rendering a string with the
+ * current context.
+ */
+class Mustache_LambdaHelper
+{
+    private $mustache;
+    private $context;
+    private $delims;
+
+    /**
+     * Mustache Lambda Helper constructor.
+     *
+     * @param Mustache_Engine  $mustache Mustache engine instance
+     * @param Mustache_Context $context  Rendering context
+     * @param string           $delims   Optional custom delimiters, in the format `{{= <% %> =}}`. (default: null)
+     */
+    public function __construct(Mustache_Engine $mustache, Mustache_Context $context, $delims = null)
+    {
+        $this->mustache = $mustache;
+        $this->context  = $context;
+        $this->delims   = $delims;
+    }
+
+    /**
+     * Render a string as a Mustache template with the current rendering context.
+     *
+     * @param string $string
+     *
+     * @return string Rendered template
+     */
+    public function render($string)
+    {
+        return $this->mustache
+            ->loadLambda((string) $string, $this->delims)
+            ->renderInternal($this->context);
+    }
+
+    /**
+     * Render a string as a Mustache template with the current rendering context.
+     *
+     * @param string $string
+     *
+     * @return string Rendered template
+     */
+    public function __invoke($string)
+    {
+        return $this->render($string);
+    }
+
+    /**
+     * Get a Lambda Helper with custom delimiters.
+     *
+     * @param string $delims Custom delimiters, in the format `{{= <% %> =}}`
+     *
+     * @return Mustache_LambdaHelper
+     */
+    public function withDelimiters($delims)
+    {
+        return new self($this->mustache, $this->context, $delims);
+    }
+}
diff --git a/Mustache/Loader.php b/Mustache/Loader.php
index f082cf59..23adba1a 100644
--- a/Mustache/Loader.php
+++ b/Mustache/Loader.php
@@ -1,26 +1,27 @@
-<?php

-

-/*

- * This file is part of Mustache.php.

- *

- * (c) 2012 Justin Hileman

- *

- * For the full copyright and license information, please view the LICENSE

- * file that was distributed with this source code.

- */

-

-/**

- * Mustache Template Loader interface.

- */

-interface Mustache_Loader

-{

-

-    /**

-     * Load a Template by name.

-     *

-     * @param string $name

-     *

-     * @return string Mustache Template source

-     */

-    public function load($name);

-}

+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Mustache Template Loader interface.
+ */
+interface Mustache_Loader
+{
+    /**
+     * Load a Template by name.
+     *
+     * @throws Mustache_Exception_UnknownTemplateException If a template file is not found
+     *
+     * @param string $name
+     *
+     * @return string|Mustache_Source Mustache Template source
+     */
+    public function load($name);
+}
diff --git a/Mustache/Loader/ArrayLoader.php b/Mustache/Loader/ArrayLoader.php
index 0a9ceefb..4276493a 100644
--- a/Mustache/Loader/ArrayLoader.php
+++ b/Mustache/Loader/ArrayLoader.php
@@ -1,79 +1,79 @@
-<?php

-

-/*

- * This file is part of Mustache.php.

- *

- * (c) 2012 Justin Hileman

- *

- * For the full copyright and license information, please view the LICENSE

- * file that was distributed with this source code.

- */

-

-/**

- * Mustache Template array Loader implementation.

- *

- * An ArrayLoader instance loads Mustache Template source by name from an initial array:

- *

- *     $loader = new ArrayLoader(

- *         'foo' => '{{ bar }}',

- *         'baz' => 'Hey {{ qux }}!'

- *     );

- *

- *     $tpl = $loader->load('foo'); // '{{ bar }}'

- *

- * The ArrayLoader is used internally as a partials loader by Mustache_Engine instance when an array of partials

- * is set. It can also be used as a quick-and-dirty Template loader.

- *

- * @implements Loader

- * @implements MutableLoader

- */

-class Mustache_Loader_ArrayLoader implements Mustache_Loader, Mustache_Loader_MutableLoader

-{

-

-    /**

-     * ArrayLoader constructor.

-     *

-     * @param array $templates Associative array of Template source (default: array())

-     */

-    public function __construct(array $templates = array())

-    {

-        $this->templates = $templates;

-    }

-

-    /**

-     * Load a Template.

-     *

-     * @param string $name

-     *

-     * @return string Mustache Template source

-     */

-    public function load($name)

-    {

-        if (!isset($this->templates[$name])) {

-            throw new InvalidArgumentException('Template '.$name.' not found.');

-        }

-

-        return $this->templates[$name];

-    }

-

-    /**

-     * Set an associative array of Template sources for this loader.

-     *

-     * @param array $templates

-     */

-    public function setTemplates(array $templates)

-    {

-        $this->templates = $templates;

-    }

-

-    /**

-     * Set a Template source by name.

-     *

-     * @param string $name

-     * @param string $template Mustache Template source

-     */

-    public function setTemplate($name, $template)

-    {

-        $this->templates[$name] = $template;

-    }

-}

+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Mustache Template array Loader implementation.
+ *
+ * An ArrayLoader instance loads Mustache Template source by name from an initial array:
+ *
+ *     $loader = new ArrayLoader(
+ *         'foo' => '{{ bar }}',
+ *         'baz' => 'Hey {{ qux }}!'
+ *     );
+ *
+ *     $tpl = $loader->load('foo'); // '{{ bar }}'
+ *
+ * The ArrayLoader is used internally as a partials loader by Mustache_Engine instance when an array of partials
+ * is set. It can also be used as a quick-and-dirty Template loader.
+ */
+class Mustache_Loader_ArrayLoader implements Mustache_Loader, Mustache_Loader_MutableLoader
+{
+    private $templates;
+
+    /**
+     * ArrayLoader constructor.
+     *
+     * @param array $templates Associative array of Template source (default: array())
+     */
+    public function __construct(array $templates = array())
+    {
+        $this->templates = $templates;
+    }
+
+    /**
+     * Load a Template.
+     *
+     * @throws Mustache_Exception_UnknownTemplateException If a template file is not found
+     *
+     * @param string $name
+     *
+     * @return string Mustache Template source
+     */
+    public function load($name)
+    {
+        if (!isset($this->templates[$name])) {
+            throw new Mustache_Exception_UnknownTemplateException($name);
+        }
+
+        return $this->templates[$name];
+    }
+
+    /**
+     * Set an associative array of Template sources for this loader.
+     *
+     * @param array $templates
+     */
+    public function setTemplates(array $templates)
+    {
+        $this->templates = $templates;
+    }
+
+    /**
+     * Set a Template source by name.
+     *
+     * @param string $name
+     * @param string $template Mustache Template source
+     */
+    public function setTemplate($name, $template)
+    {
+        $this->templates[$name] = $template;
+    }
+}
diff --git a/Mustache/Loader/CascadingLoader.php b/Mustache/Loader/CascadingLoader.php
new file mode 100644
index 00000000..3fb6353c
--- /dev/null
+++ b/Mustache/Loader/CascadingLoader.php
@@ -0,0 +1,69 @@
+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * A Mustache Template cascading loader implementation, which delegates to other
+ * Loader instances.
+ */
+class Mustache_Loader_CascadingLoader implements Mustache_Loader
+{
+    private $loaders;
+
+    /**
+     * Construct a CascadingLoader with an array of loaders.
+     *
+     *     $loader = new Mustache_Loader_CascadingLoader(array(
+     *         new Mustache_Loader_InlineLoader(__FILE__, __COMPILER_HALT_OFFSET__),
+     *         new Mustache_Loader_FilesystemLoader(__DIR__.'/templates')
+     *     ));
+     *
+     * @param Mustache_Loader[] $loaders
+     */
+    public function __construct(array $loaders = array())
+    {
+        $this->loaders = array();
+        foreach ($loaders as $loader) {
+            $this->addLoader($loader);
+        }
+    }
+
+    /**
+     * Add a Loader instance.
+     *
+     * @param Mustache_Loader $loader
+     */
+    public function addLoader(Mustache_Loader $loader)
+    {
+        $this->loaders[] = $loader;
+    }
+
+    /**
+     * Load a Template by name.
+     *
+     * @throws Mustache_Exception_UnknownTemplateException If a template file is not found
+     *
+     * @param string $name
+     *
+     * @return string Mustache Template source
+     */
+    public function load($name)
+    {
+        foreach ($this->loaders as $loader) {
+            try {
+                return $loader->load($name);
+            } catch (Mustache_Exception_UnknownTemplateException $e) {
+                // do nothing, check the next loader.
+            }
+        }
+
+        throw new Mustache_Exception_UnknownTemplateException($name);
+    }
+}
diff --git a/Mustache/Loader/FilesystemLoader.php b/Mustache/Loader/FilesystemLoader.php
index 34a9ecfd..e366df70 100644
--- a/Mustache/Loader/FilesystemLoader.php
+++ b/Mustache/Loader/FilesystemLoader.php
@@ -1,118 +1,135 @@
-<?php

-

-/*

- * This file is part of Mustache.php.

- *

- * (c) 2012 Justin Hileman

- *

- * For the full copyright and license information, please view the LICENSE

- * file that was distributed with this source code.

- */

-

-/**

- * Mustache Template filesystem Loader implementation.

- *

- * An ArrayLoader instance loads Mustache Template source from the filesystem by name:

- *

- *     $loader = new FilesystemLoader(dirname(__FILE__).'/views');

- *     $tpl = $loader->load('foo'); // equivalent to `file_get_contents(dirname(__FILE__).'/views/foo.mustache');

- *

- * This is probably the most useful Mustache Loader implementation. It can be used for partials and normal Templates:

- *

- *     $m = new Mustache(array(

- *          'loader'          => new FilesystemLoader(dirname(__FILE__).'/views'),

- *          'partials_loader' => new FilesystemLoader(dirname(__FILE__).'/views/partials'),

- *     ));

- *

- * @implements Loader

- */

-class Mustache_Loader_FilesystemLoader implements Mustache_Loader

-{

-    private $baseDir;

-    private $extension = '.mustache';

-    private $templates = array();

-

-    /**

-     * Mustache filesystem Loader constructor.

-     *

-     * Passing an $options array allows overriding certain Loader options during instantiation:

-     *

-     *     $options = array(

-     *         // The filename extension used for Mustache templates. Defaults to '.mustache'

-     *         'extension' => '.ms',

-     *     );

-     *

-     * @throws RuntimeException if $baseDir does not exist.

-     *

-     * @param string $baseDir Base directory containing Mustache template files.

-     * @param array  $options Array of Loader options (default: array())

-     */

-    public function __construct($baseDir, array $options = array())

-    {

-        $this->baseDir = rtrim(realpath($baseDir), '/');

-

-        if (!is_dir($this->baseDir)) {

-            throw new RuntimeException('FilesystemLoader baseDir must be a directory: '.$baseDir);

-        }

-

-        if (isset($options['extension'])) {

-            $this->extension = '.' . ltrim($options['extension'], '.');

-        }

-    }

-

-    /**

-     * Load a Template by name.

-     *

-     *     $loader = new FilesystemLoader(dirname(__FILE__).'/views');

-     *     $loader->load('admin/dashboard'); // loads "./views/admin/dashboard.mustache";

-     *

-     * @param string $name

-     *

-     * @return string Mustache Template source

-     */

-    public function load($name)

-    {

-        if (!isset($this->templates[$name])) {

-            $this->templates[$name] = $this->loadFile($name);

-        }

-

-        return $this->templates[$name];

-    }

-

-    /**

-     * Helper function for loading a Mustache file by name.

-     *

-     * @throws InvalidArgumentException if a template file is not found.

-     *

-     * @param string $name

-     *

-     * @return string Mustache Template source

-     */

-    protected function loadFile($name)

-    {

-        $fileName = $this->getFileName($name);

-

-        if (!file_exists($fileName)) {

-            throw new InvalidArgumentException('Template '.$name.' not found.');

-        }

-

-        return file_get_contents($fileName);

-    }

-

-    /**

-     * Helper function for getting a Mustache template file name.

-     *

-     * @param string $name

-     *

-     * @return string Template file name

-     */

-    protected function getFileName($name)

-    {

-        $fileName = $this->baseDir . '/' . $name;

-        if (substr($fileName, 0 - strlen($this->extension)) !== $this->extension) {

-            $fileName .= $this->extension;

-        }

-

-        return $fileName;

-    }

-}

+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Mustache Template filesystem Loader implementation.
+ *
+ * A FilesystemLoader instance loads Mustache Template source from the filesystem by name:
+ *
+ *     $loader = new Mustache_Loader_FilesystemLoader(dirname(__FILE__).'/views');
+ *     $tpl = $loader->load('foo'); // equivalent to `file_get_contents(dirname(__FILE__).'/views/foo.mustache');
+ *
+ * This is probably the most useful Mustache Loader implementation. It can be used for partials and normal Templates:
+ *
+ *     $m = new Mustache(array(
+ *          'loader'          => new Mustache_Loader_FilesystemLoader(dirname(__FILE__).'/views'),
+ *          'partials_loader' => new Mustache_Loader_FilesystemLoader(dirname(__FILE__).'/views/partials'),
+ *     ));
+ */
+class Mustache_Loader_FilesystemLoader implements Mustache_Loader
+{
+    private $baseDir;
+    private $extension = '.mustache';
+    private $templates = array();
+
+    /**
+     * Mustache filesystem Loader constructor.
+     *
+     * Passing an $options array allows overriding certain Loader options during instantiation:
+     *
+     *     $options = array(
+     *         // The filename extension used for Mustache templates. Defaults to '.mustache'
+     *         'extension' => '.ms',
+     *     );
+     *
+     * @throws Mustache_Exception_RuntimeException if $baseDir does not exist
+     *
+     * @param string $baseDir Base directory containing Mustache template files
+     * @param array  $options Array of Loader options (default: array())
+     */
+    public function __construct($baseDir, array $options = array())
+    {
+        $this->baseDir = $baseDir;
+
+        if (strpos($this->baseDir, '://') === false) {
+            $this->baseDir = realpath($this->baseDir);
+        }
+
+        if ($this->shouldCheckPath() && !is_dir($this->baseDir)) {
+            throw new Mustache_Exception_RuntimeException(sprintf('FilesystemLoader baseDir must be a directory: %s', $baseDir));
+        }
+
+        if (array_key_exists('extension', $options)) {
+            if (empty($options['extension'])) {
+                $this->extension = '';
+            } else {
+                $this->extension = '.' . ltrim($options['extension'], '.');
+            }
+        }
+    }
+
+    /**
+     * Load a Template by name.
+     *
+     *     $loader = new Mustache_Loader_FilesystemLoader(dirname(__FILE__).'/views');
+     *     $loader->load('admin/dashboard'); // loads "./views/admin/dashboard.mustache";
+     *
+     * @param string $name
+     *
+     * @return string Mustache Template source
+     */
+    public function load($name)
+    {
+        if (!isset($this->templates[$name])) {
+            $this->templates[$name] = $this->loadFile($name);
+        }
+
+        return $this->templates[$name];
+    }
+
+    /**
+     * Helper function for loading a Mustache file by name.
+     *
+     * @throws Mustache_Exception_UnknownTemplateException If a template file is not found
+     *
+     * @param string $name
+     *
+     * @return string Mustache Template source
+     */
+    protected function loadFile($name)
+    {
+        $fileName = $this->getFileName($name);
+
+        if ($this->shouldCheckPath() && !file_exists($fileName)) {
+            throw new Mustache_Exception_UnknownTemplateException($name);
+        }
+
+        return file_get_contents($fileName);
+    }
+
+    /**
+     * Helper function for getting a Mustache template file name.
+     *
+     * @param string $name
+     *
+     * @return string Template file name
+     */
+    protected function getFileName($name)
+    {
+        $fileName = $this->baseDir . '/' . $name;
+        if (substr($fileName, 0 - strlen($this->extension)) !== $this->extension) {
+            $fileName .= $this->extension;
+        }
+
+        return $fileName;
+    }
+
+    /**
+     * Only check if baseDir is a directory and requested templates are files if
+     * baseDir is using the filesystem stream wrapper.
+     *
+     * @return bool Whether to check `is_dir` and `file_exists`
+     */
+    protected function shouldCheckPath()
+    {
+        return strpos($this->baseDir, '://') === false || strpos($this->baseDir, 'file://') === 0;
+    }
+}
diff --git a/Mustache/Loader/InlineLoader.php b/Mustache/Loader/InlineLoader.php
new file mode 100644
index 00000000..ae297fec
--- /dev/null
+++ b/Mustache/Loader/InlineLoader.php
@@ -0,0 +1,123 @@
+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * A Mustache Template loader for inline templates.
+ *
+ * With the InlineLoader, templates can be defined at the end of any PHP source
+ * file:
+ *
+ *     $loader  = new Mustache_Loader_InlineLoader(__FILE__, __COMPILER_HALT_OFFSET__);
+ *     $hello   = $loader->load('hello');
+ *     $goodbye = $loader->load('goodbye');
+ *
+ *     __halt_compiler();
+ *
+ *     @@ hello
+ *     Hello, {{ planet }}!
+ *
+ *     @@ goodbye
+ *     Goodbye, cruel {{ planet }}
+ *
+ * Templates are deliniated by lines containing only `@@ name`.
+ *
+ * The InlineLoader is well-suited to micro-frameworks such as Silex:
+ *
+ *     $app->register(new MustacheServiceProvider, array(
+ *         'mustache.loader' => new Mustache_Loader_InlineLoader(__FILE__, __COMPILER_HALT_OFFSET__)
+ *     ));
+ *
+ *     $app->get('/{name}', function ($name) use ($app) {
+ *         return $app['mustache']->render('hello', compact('name'));
+ *     })
+ *     ->value('name', 'world');
+ *
+ *     // ...
+ *
+ *     __halt_compiler();
+ *
+ *     @@ hello
+ *     Hello, {{ name }}!
+ */
+class Mustache_Loader_InlineLoader implements Mustache_Loader
+{
+    protected $fileName;
+    protected $offset;
+    protected $templates;
+
+    /**
+     * The InlineLoader requires a filename and offset to process templates.
+     *
+     * The magic constants `__FILE__` and `__COMPILER_HALT_OFFSET__` are usually
+     * perfectly suited to the job:
+     *
+     *     $loader = new Mustache_Loader_InlineLoader(__FILE__, __COMPILER_HALT_OFFSET__);
+     *
+     * Note that this only works if the loader is instantiated inside the same
+     * file as the inline templates. If the templates are located in another
+     * file, it would be necessary to manually specify the filename and offset.
+     *
+     * @param string $fileName The file to parse for inline templates
+     * @param int    $offset   A string offset for the start of the templates.
+     *                         This usually coincides with the `__halt_compiler`
+     *                         call, and the `__COMPILER_HALT_OFFSET__`
+     */
+    public function __construct($fileName, $offset)
+    {
+        if (!is_file($fileName)) {
+            throw new Mustache_Exception_InvalidArgumentException('InlineLoader expects a valid filename.');
+        }
+
+        if (!is_int($offset) || $offset < 0) {
+            throw new Mustache_Exception_InvalidArgumentException('InlineLoader expects a valid file offset.');
+        }
+
+        $this->fileName = $fileName;
+        $this->offset   = $offset;
+    }
+
+    /**
+     * Load a Template by name.
+     *
+     * @throws Mustache_Exception_UnknownTemplateException If a template file is not found
+     *
+     * @param string $name
+     *
+     * @return string Mustache Template source
+     */
+    public function load($name)
+    {
+        $this->loadTemplates();
+
+        if (!array_key_exists($name, $this->templates)) {
+            throw new Mustache_Exception_UnknownTemplateException($name);
+        }
+
+        return $this->templates[$name];
+    }
+
+    /**
+     * Parse and load templates from the end of a source file.
+     */
+    protected function loadTemplates()
+    {
+        if ($this->templates === null) {
+            $this->templates = array();
+            $data = file_get_contents($this->fileName, false, null, $this->offset);
+            foreach (preg_split("/^@@(?= [\w\d\.]+$)/m", $data, -1) as $chunk) {
+                if (trim($chunk)) {
+                    list($name, $content)         = explode("\n", $chunk, 2);
+                    $this->templates[trim($name)] = trim($content);
+                }
+            }
+        }
+    }
+}
diff --git a/Mustache/Loader/MutableLoader.php b/Mustache/Loader/MutableLoader.php
index 952db2f0..57fe5be3 100644
--- a/Mustache/Loader/MutableLoader.php
+++ b/Mustache/Loader/MutableLoader.php
@@ -1,32 +1,31 @@
-<?php

-

-/*

- * This file is part of Mustache.php.

- *

- * (c) 2012 Justin Hileman

- *

- * For the full copyright and license information, please view the LICENSE

- * file that was distributed with this source code.

- */

-

-/**

- * Mustache Template mutable Loader interface.

- */

-interface Mustache_Loader_MutableLoader

-{

-

-    /**

-     * Set an associative array of Template sources for this loader.

-     *

-     * @param array $templates

-     */

-    public function setTemplates(array $templates);

-

-    /**

-     * Set a Template source by name.

-     *

-     * @param string $name

-     * @param string $template Mustache Template source

-     */

-    public function setTemplate($name, $template);

-}

+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Mustache Template mutable Loader interface.
+ */
+interface Mustache_Loader_MutableLoader
+{
+    /**
+     * Set an associative array of Template sources for this loader.
+     *
+     * @param array $templates
+     */
+    public function setTemplates(array $templates);
+
+    /**
+     * Set a Template source by name.
+     *
+     * @param string $name
+     * @param string $template Mustache Template source
+     */
+    public function setTemplate($name, $template);
+}
diff --git a/Mustache/Loader/ProductionFilesystemLoader.php b/Mustache/Loader/ProductionFilesystemLoader.php
new file mode 100644
index 00000000..e7353327
--- /dev/null
+++ b/Mustache/Loader/ProductionFilesystemLoader.php
@@ -0,0 +1,86 @@
+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Mustache Template production filesystem Loader implementation.
+ *
+ * A production-ready FilesystemLoader, which doesn't require reading a file if it already exists in the template cache.
+ *
+ * {@inheritdoc}
+ */
+class Mustache_Loader_ProductionFilesystemLoader extends Mustache_Loader_FilesystemLoader
+{
+    private $statProps;
+
+    /**
+     * Mustache production filesystem Loader constructor.
+     *
+     * Passing an $options array allows overriding certain Loader options during instantiation:
+     *
+     *     $options = array(
+     *         // The filename extension used for Mustache templates. Defaults to '.mustache'
+     *         'extension' => '.ms',
+     *         'stat_props' => array('size', 'mtime'),
+     *     );
+     *
+     * Specifying 'stat_props' overrides the stat properties used to invalidate the template cache. By default, this
+     * uses 'mtime' and 'size', but this can be set to any of the properties supported by stat():
+     *
+     *     http://php.net/manual/en/function.stat.php
+     *
+     * You can also disable filesystem stat entirely:
+     *
+     *     $options = array('stat_props' => null);
+     *
+     * But with great power comes great responsibility. Namely, if you disable stat-based cache invalidation,
+     * YOU MUST CLEAR THE TEMPLATE CACHE YOURSELF when your templates change. Make it part of your build or deploy
+     * process so you don't forget!
+     *
+     * @throws Mustache_Exception_RuntimeException if $baseDir does not exist.
+     *
+     * @param string $baseDir Base directory containing Mustache template files.
+     * @param array  $options Array of Loader options (default: array())
+     */
+    public function __construct($baseDir, array $options = array())
+    {
+        parent::__construct($baseDir, $options);
+
+        if (array_key_exists('stat_props', $options)) {
+            if (empty($options['stat_props'])) {
+                $this->statProps = array();
+            } else {
+                $this->statProps = $options['stat_props'];
+            }
+        } else {
+            $this->statProps = array('size', 'mtime');
+        }
+    }
+
+    /**
+     * Helper function for loading a Mustache file by name.
+     *
+     * @throws Mustache_Exception_UnknownTemplateException If a template file is not found.
+     *
+     * @param string $name
+     *
+     * @return Mustache_Source Mustache Template source
+     */
+    protected function loadFile($name)
+    {
+        $fileName = $this->getFileName($name);
+
+        if (!file_exists($fileName)) {
+            throw new Mustache_Exception_UnknownTemplateException($name);
+        }
+
+        return new Mustache_Source_FilesystemSource($fileName, $this->statProps);
+    }
+}
diff --git a/Mustache/Loader/StringLoader.php b/Mustache/Loader/StringLoader.php
index 8f18062f..7012c03b 100644
--- a/Mustache/Loader/StringLoader.php
+++ b/Mustache/Loader/StringLoader.php
@@ -1,42 +1,39 @@
-<?php

-

-/*

- * This file is part of Mustache.php.

- *

- * (c) 2012 Justin Hileman

- *

- * For the full copyright and license information, please view the LICENSE

- * file that was distributed with this source code.

- */

-

-/**

- * Mustache Template string Loader implementation.

- *

- * A StringLoader instance is essentially a noop. It simply passes the 'name' argument straight through:

- *

- *     $loader = new StringLoader;

- *     $tpl = $loader->load('{{ foo }}'); // '{{ foo }}'

- *

- * This is the default Template Loader instance used by Mustache:

- *

- *     $m = new Mustache;

- *     $tpl = $m->loadTemplate('{{ foo }}');

- *     echo $tpl->render(array('foo' => 'bar')); // "bar"

- *

- * @implements Loader

- */

-class Mustache_Loader_StringLoader implements Mustache_Loader

-{

-

-    /**

-     * Load a Template by source.

-     *

-     * @param string $name Mustache Template source

-     *

-     * @return string Mustache Template source

-     */

-    public function load($name)

-    {

-        return $name;

-    }

-}

+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Mustache Template string Loader implementation.
+ *
+ * A StringLoader instance is essentially a noop. It simply passes the 'name' argument straight through:
+ *
+ *     $loader = new StringLoader;
+ *     $tpl = $loader->load('{{ foo }}'); // '{{ foo }}'
+ *
+ * This is the default Template Loader instance used by Mustache:
+ *
+ *     $m = new Mustache;
+ *     $tpl = $m->loadTemplate('{{ foo }}');
+ *     echo $tpl->render(array('foo' => 'bar')); // "bar"
+ */
+class Mustache_Loader_StringLoader implements Mustache_Loader
+{
+    /**
+     * Load a Template by source.
+     *
+     * @param string $name Mustache Template source
+     *
+     * @return string Mustache Template source
+     */
+    public function load($name)
+    {
+        return $name;
+    }
+}
diff --git a/Mustache/Logger.php b/Mustache/Logger.php
new file mode 100644
index 00000000..cb4037a2
--- /dev/null
+++ b/Mustache/Logger.php
@@ -0,0 +1,126 @@
+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Describes a Mustache logger instance.
+ *
+ * This is identical to the Psr\Log\LoggerInterface.
+ *
+ * The message MUST be a string or object implementing __toString().
+ *
+ * The message MAY contain placeholders in the form: {foo} where foo
+ * will be replaced by the context data in key "foo".
+ *
+ * The context array can contain arbitrary data, the only assumption that
+ * can be made by implementors is that if an Exception instance is given
+ * to produce a stack trace, it MUST be in a key named "exception".
+ *
+ * See https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-3-logger-interface.md
+ * for the full interface specification.
+ */
+interface Mustache_Logger
+{
+    /**
+     * Psr\Log compatible log levels.
+     */
+    const EMERGENCY = 'emergency';
+    const ALERT     = 'alert';
+    const CRITICAL  = 'critical';
+    const ERROR     = 'error';
+    const WARNING   = 'warning';
+    const NOTICE    = 'notice';
+    const INFO      = 'info';
+    const DEBUG     = 'debug';
+
+    /**
+     * System is unusable.
+     *
+     * @param string $message
+     * @param array  $context
+     */
+    public function emergency($message, array $context = array());
+
+    /**
+     * Action must be taken immediately.
+     *
+     * Example: Entire website down, database unavailable, etc. This should
+     * trigger the SMS alerts and wake you up.
+     *
+     * @param string $message
+     * @param array  $context
+     */
+    public function alert($message, array $context = array());
+
+    /**
+     * Critical conditions.
+     *
+     * Example: Application component unavailable, unexpected exception.
+     *
+     * @param string $message
+     * @param array  $context
+     */
+    public function critical($message, array $context = array());
+
+    /**
+     * Runtime errors that do not require immediate action but should typically
+     * be logged and monitored.
+     *
+     * @param string $message
+     * @param array  $context
+     */
+    public function error($message, array $context = array());
+
+    /**
+     * Exceptional occurrences that are not errors.
+     *
+     * Example: Use of deprecated APIs, poor use of an API, undesirable things
+     * that are not necessarily wrong.
+     *
+     * @param string $message
+     * @param array  $context
+     */
+    public function warning($message, array $context = array());
+
+    /**
+     * Normal but significant events.
+     *
+     * @param string $message
+     * @param array  $context
+     */
+    public function notice($message, array $context = array());
+
+    /**
+     * Interesting events.
+     *
+     * Example: User logs in, SQL logs.
+     *
+     * @param string $message
+     * @param array  $context
+     */
+    public function info($message, array $context = array());
+
+    /**
+     * Detailed debug information.
+     *
+     * @param string $message
+     * @param array  $context
+     */
+    public function debug($message, array $context = array());
+
+    /**
+     * Logs with an arbitrary level.
+     *
+     * @param mixed  $level
+     * @param string $message
+     * @param array  $context
+     */
+    public function log($level, $message, array $context = array());
+}
diff --git a/Mustache/Logger/AbstractLogger.php b/Mustache/Logger/AbstractLogger.php
new file mode 100644
index 00000000..a169f9c6
--- /dev/null
+++ b/Mustache/Logger/AbstractLogger.php
@@ -0,0 +1,121 @@
+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * This is a simple Logger implementation that other Loggers can inherit from.
+ *
+ * This is identical to the Psr\Log\AbstractLogger.
+ *
+ * It simply delegates all log-level-specific methods to the `log` method to
+ * reduce boilerplate code that a simple Logger that does the same thing with
+ * messages regardless of the error level has to implement.
+ */
+abstract class Mustache_Logger_AbstractLogger implements Mustache_Logger
+{
+    /**
+     * System is unusable.
+     *
+     * @param string $message
+     * @param array  $context
+     */
+    public function emergency($message, array $context = array())
+    {
+        $this->log(Mustache_Logger::EMERGENCY, $message, $context);
+    }
+
+    /**
+     * Action must be taken immediately.
+     *
+     * Example: Entire website down, database unavailable, etc. This should
+     * trigger the SMS alerts and wake you up.
+     *
+     * @param string $message
+     * @param array  $context
+     */
+    public function alert($message, array $context = array())
+    {
+        $this->log(Mustache_Logger::ALERT, $message, $context);
+    }
+
+    /**
+     * Critical conditions.
+     *
+     * Example: Application component unavailable, unexpected exception.
+     *
+     * @param string $message
+     * @param array  $context
+     */
+    public function critical($message, array $context = array())
+    {
+        $this->log(Mustache_Logger::CRITICAL, $message, $context);
+    }
+
+    /**
+     * Runtime errors that do not require immediate action but should typically
+     * be logged and monitored.
+     *
+     * @param string $message
+     * @param array  $context
+     */
+    public function error($message, array $context = array())
+    {
+        $this->log(Mustache_Logger::ERROR, $message, $context);
+    }
+
+    /**
+     * Exceptional occurrences that are not errors.
+     *
+     * Example: Use of deprecated APIs, poor use of an API, undesirable things
+     * that are not necessarily wrong.
+     *
+     * @param string $message
+     * @param array  $context
+     */
+    public function warning($message, array $context = array())
+    {
+        $this->log(Mustache_Logger::WARNING, $message, $context);
+    }
+
+    /**
+     * Normal but significant events.
+     *
+     * @param string $message
+     * @param array  $context
+     */
+    public function notice($message, array $context = array())
+    {
+        $this->log(Mustache_Logger::NOTICE, $message, $context);
+    }
+
+    /**
+     * Interesting events.
+     *
+     * Example: User logs in, SQL logs.
+     *
+     * @param string $message
+     * @param array  $context
+     */
+    public function info($message, array $context = array())
+    {
+        $this->log(Mustache_Logger::INFO, $message, $context);
+    }
+
+    /**
+     * Detailed debug information.
+     *
+     * @param string $message
+     * @param array  $context
+     */
+    public function debug($message, array $context = array())
+    {
+        $this->log(Mustache_Logger::DEBUG, $message, $context);
+    }
+}
diff --git a/Mustache/Logger/StreamLogger.php b/Mustache/Logger/StreamLogger.php
new file mode 100644
index 00000000..402a148e
--- /dev/null
+++ b/Mustache/Logger/StreamLogger.php
@@ -0,0 +1,194 @@
+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * A Mustache Stream Logger.
+ *
+ * The Stream Logger wraps a file resource instance (such as a stream) or a
+ * stream URL. All log messages over the threshold level will be appended to
+ * this stream.
+ *
+ * Hint: Try `php://stderr` for your stream URL.
+ */
+class Mustache_Logger_StreamLogger extends Mustache_Logger_AbstractLogger
+{
+    protected static $levels = array(
+        self::DEBUG     => 100,
+        self::INFO      => 200,
+        self::NOTICE    => 250,
+        self::WARNING   => 300,
+        self::ERROR     => 400,
+        self::CRITICAL  => 500,
+        self::ALERT     => 550,
+        self::EMERGENCY => 600,
+    );
+
+    protected $level;
+    protected $stream = null;
+    protected $url    = null;
+
+    /**
+     * @throws InvalidArgumentException if the logging level is unknown
+     *
+     * @param resource|string $stream Resource instance or URL
+     * @param int             $level  The minimum logging level at which this handler will be triggered
+     */
+    public function __construct($stream, $level = Mustache_Logger::ERROR)
+    {
+        $this->setLevel($level);
+
+        if (is_resource($stream)) {
+            $this->stream = $stream;
+        } else {
+            $this->url = $stream;
+        }
+    }
+
+    /**
+     * Close stream resources.
+     */
+    public function __destruct()
+    {
+        if (is_resource($this->stream)) {
+            fclose($this->stream);
+        }
+    }
+
+    /**
+     * Set the minimum logging level.
+     *
+     * @throws Mustache_Exception_InvalidArgumentException if the logging level is unknown
+     *
+     * @param int $level The minimum logging level which will be written
+     */
+    public function setLevel($level)
+    {
+        if (!array_key_exists($level, self::$levels)) {
+            throw new Mustache_Exception_InvalidArgumentException(sprintf('Unexpected logging level: %s', $level));
+        }
+
+        $this->level = $level;
+    }
+
+    /**
+     * Get the current minimum logging level.
+     *
+     * @return int
+     */
+    public function getLevel()
+    {
+        return $this->level;
+    }
+
+    /**
+     * Logs with an arbitrary level.
+     *
+     * @throws Mustache_Exception_InvalidArgumentException if the logging level is unknown
+     *
+     * @param mixed  $level
+     * @param string $message
+     * @param array  $context
+     */
+    public function log($level, $message, array $context = array())
+    {
+        if (!array_key_exists($level, self::$levels)) {
+            throw new Mustache_Exception_InvalidArgumentException(sprintf('Unexpected logging level: %s', $level));
+        }
+
+        if (self::$levels[$level] >= self::$levels[$this->level]) {
+            $this->writeLog($level, $message, $context);
+        }
+    }
+
+    /**
+     * Write a record to the log.
+     *
+     * @throws Mustache_Exception_LogicException   If neither a stream resource nor url is present
+     * @throws Mustache_Exception_RuntimeException If the stream url cannot be opened
+     *
+     * @param int    $level   The logging level
+     * @param string $message The log message
+     * @param array  $context The log context
+     */
+    protected function writeLog($level, $message, array $context = array())
+    {
+        if (!is_resource($this->stream)) {
+            if (!isset($this->url)) {
+                throw new Mustache_Exception_LogicException('Missing stream url, the stream can not be opened. This may be caused by a premature call to close().');
+            }
+
+            $this->stream = fopen($this->url, 'a');
+            if (!is_resource($this->stream)) {
+                // @codeCoverageIgnoreStart
+                throw new Mustache_Exception_RuntimeException(sprintf('The stream or file "%s" could not be opened.', $this->url));
+                // @codeCoverageIgnoreEnd
+            }
+        }
+
+        fwrite($this->stream, self::formatLine($level, $message, $context));
+    }
+
+    /**
+     * Gets the name of the logging level.
+     *
+     * @throws InvalidArgumentException if the logging level is unknown
+     *
+     * @param int $level
+     *
+     * @return string
+     */
+    protected static function getLevelName($level)
+    {
+        return strtoupper($level);
+    }
+
+    /**
+     * Format a log line for output.
+     *
+     * @param int    $level   The logging level
+     * @param string $message The log message
+     * @param array  $context The log context
+     *
+     * @return string
+     */
+    protected static function formatLine($level, $message, array $context = array())
+    {
+        return sprintf(
+            "%s: %s\n",
+            self::getLevelName($level),
+            self::interpolateMessage($message, $context)
+        );
+    }
+
+    /**
+     * Interpolate context values into the message placeholders.
+     *
+     * @param string $message
+     * @param array  $context
+     *
+     * @return string
+     */
+    protected static function interpolateMessage($message, array $context = array())
+    {
+        if (strpos($message, '{') === false) {
+            return $message;
+        }
+
+        // build a replacement array with braces around the context keys
+        $replace = array();
+        foreach ($context as $key => $val) {
+            $replace['{' . $key . '}'] = $val;
+        }
+
+        // interpolate replacement values into the the message and return
+        return strtr($message, $replace);
+    }
+}
diff --git a/Mustache/Parser.php b/Mustache/Parser.php
index 39911d6b..5db58244 100644
--- a/Mustache/Parser.php
+++ b/Mustache/Parser.php
@@ -1,88 +1,385 @@
-<?php

-

-/*

- * This file is part of Mustache.php.

- *

- * (c) 2012 Justin Hileman

- *

- * For the full copyright and license information, please view the LICENSE

- * file that was distributed with this source code.

- */

-

-/**

- * Mustache Parser class.

- *

- * This class is responsible for turning a set of Mustache tokens into a parse tree.

- */

-class Mustache_Parser

-{

-

-    /**

-     * Process an array of Mustache tokens and convert them into a parse tree.

-     *

-     * @param array $tokens Set of Mustache tokens

-     *

-     * @return array Mustache token parse tree

-     */

-    public function parse(array $tokens = array())

-    {

-        return $this->buildTree(new ArrayIterator($tokens));

-    }

-

-    /**

-     * Helper method for recursively building a parse tree.

-     *

-     * @param ArrayIterator $tokens Stream of Mustache tokens

-     * @param array         $parent Parent token (default: null)

-     *

-     * @return array Mustache Token parse tree

-     *

-     * @throws LogicException when nesting errors or mismatched section tags are encountered.

-     */

-    private function buildTree(ArrayIterator $tokens, array $parent = null)

-    {

-        $nodes = array();

-

-        do {

-            $token = $tokens->current();

-            $tokens->next();

-

-            if ($token === null) {

-                continue;

-            } else {

-                switch ($token[Mustache_Tokenizer::TYPE]) {

-                    case Mustache_Tokenizer::T_SECTION:

-                    case Mustache_Tokenizer::T_INVERTED:

-                        $nodes[] = $this->buildTree($tokens, $token);

-                        break;

-

-                    case Mustache_Tokenizer::T_END_SECTION:

-                        if (!isset($parent)) {

-                            throw new LogicException('Unexpected closing tag: /'. $token[Mustache_Tokenizer::NAME]);

-                        }

-

-                        if ($token[Mustache_Tokenizer::NAME] !== $parent[Mustache_Tokenizer::NAME]) {

-                            throw new LogicException('Nesting error: ' . $parent[Mustache_Tokenizer::NAME] . ' vs. ' . $token[Mustache_Tokenizer::NAME]);

-                        }

-

-                        $parent[Mustache_Tokenizer::END]   = $token[Mustache_Tokenizer::INDEX];

-                        $parent[Mustache_Tokenizer::NODES] = $nodes;

-

-                        return $parent;

-                        break;

-

-                    default:

-                        $nodes[] = $token;

-                        break;

-                }

-            }

-

-        } while ($tokens->valid());

-

-        if (isset($parent)) {

-            throw new LogicException('Missing closing tag: ' . $parent[Mustache_Tokenizer::NAME]);

-        }

-

-        return $nodes;

-    }

-}

+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Mustache Parser class.
+ *
+ * This class is responsible for turning a set of Mustache tokens into a parse tree.
+ */
+class Mustache_Parser
+{
+    private $lineNum;
+    private $lineTokens;
+    private $pragmas;
+    private $defaultPragmas = array();
+
+    private $pragmaFilters;
+    private $pragmaBlocks;
+    private $pragmaDynamicNames;
+
+    /**
+     * Process an array of Mustache tokens and convert them into a parse tree.
+     *
+     * @param array $tokens Set of Mustache tokens
+     *
+     * @return array Mustache token parse tree
+     */
+    public function parse(array $tokens = array())
+    {
+        $this->lineNum    = -1;
+        $this->lineTokens = 0;
+        $this->pragmas    = $this->defaultPragmas;
+
+        $this->pragmaFilters      = isset($this->pragmas[Mustache_Engine::PRAGMA_FILTERS]);
+        $this->pragmaBlocks       = isset($this->pragmas[Mustache_Engine::PRAGMA_BLOCKS]);
+        $this->pragmaDynamicNames = isset($this->pragmas[Mustache_Engine::PRAGMA_DYNAMIC_NAMES]);
+
+        return $this->buildTree($tokens);
+    }
+
+    /**
+     * Enable pragmas across all templates, regardless of the presence of pragma
+     * tags in the individual templates.
+     *
+     * @internal Users should set global pragmas in Mustache_Engine, not here :)
+     *
+     * @param string[] $pragmas
+     */
+    public function setPragmas(array $pragmas)
+    {
+        $this->pragmas = array();
+        foreach ($pragmas as $pragma) {
+            $this->enablePragma($pragma);
+        }
+        $this->defaultPragmas = $this->pragmas;
+    }
+
+    /**
+     * Helper method for recursively building a parse tree.
+     *
+     * @throws Mustache_Exception_SyntaxException when nesting errors or mismatched section tags are encountered
+     *
+     * @param array &$tokens Set of Mustache tokens
+     * @param array $parent  Parent token (default: null)
+     *
+     * @return array Mustache Token parse tree
+     */
+    private function buildTree(array &$tokens, array $parent = null)
+    {
+        $nodes = array();
+
+        while (!empty($tokens)) {
+            $token = array_shift($tokens);
+
+            if ($token[Mustache_Tokenizer::LINE] === $this->lineNum) {
+                $this->lineTokens++;
+            } else {
+                $this->lineNum    = $token[Mustache_Tokenizer::LINE];
+                $this->lineTokens = 0;
+            }
+
+            if ($token[Mustache_Tokenizer::TYPE] !== Mustache_Tokenizer::T_COMMENT) {
+                if ($this->pragmaDynamicNames && isset($token[Mustache_Tokenizer::NAME])) {
+                    list($name, $isDynamic) = $this->getDynamicName($token);
+                    if ($isDynamic) {
+                        $token[Mustache_Tokenizer::NAME]    = $name;
+                        $token[Mustache_Tokenizer::DYNAMIC] = true;
+                    }
+                }
+
+                if ($this->pragmaFilters && isset($token[Mustache_Tokenizer::NAME])) {
+                    list($name, $filters) = $this->getNameAndFilters($token[Mustache_Tokenizer::NAME]);
+                    if (!empty($filters)) {
+                        $token[Mustache_Tokenizer::NAME]    = $name;
+                        $token[Mustache_Tokenizer::FILTERS] = $filters;
+                    }
+                }
+            }
+
+            switch ($token[Mustache_Tokenizer::TYPE]) {
+                case Mustache_Tokenizer::T_DELIM_CHANGE:
+                    $this->checkIfTokenIsAllowedInParent($parent, $token);
+                    $this->clearStandaloneLines($nodes, $tokens);
+                    break;
+
+                case Mustache_Tokenizer::T_SECTION:
+                case Mustache_Tokenizer::T_INVERTED:
+                    $this->checkIfTokenIsAllowedInParent($parent, $token);
+                    $this->clearStandaloneLines($nodes, $tokens);
+                    $nodes[] = $this->buildTree($tokens, $token);
+                    break;
+
+                case Mustache_Tokenizer::T_END_SECTION:
+                    if (!isset($parent)) {
+                        $msg = sprintf(
+                            'Unexpected closing tag: /%s on line %d',
+                            $token[Mustache_Tokenizer::NAME],
+                            $token[Mustache_Tokenizer::LINE]
+                        );
+                        throw new Mustache_Exception_SyntaxException($msg, $token);
+                    }
+
+                    $sameName = $token[Mustache_Tokenizer::NAME] !== $parent[Mustache_Tokenizer::NAME];
+                    $tokenDynamic = isset($token[Mustache_Tokenizer::DYNAMIC]) && $token[Mustache_Tokenizer::DYNAMIC];
+                    $parentDynamic = isset($parent[Mustache_Tokenizer::DYNAMIC]) && $parent[Mustache_Tokenizer::DYNAMIC];
+
+                    if ($sameName || ($tokenDynamic !== $parentDynamic)) {
+                        $msg = sprintf(
+                            'Nesting error: %s%s (on line %d) vs. %s%s (on line %d)',
+                            $parentDynamic ? '*' : '',
+                            $parent[Mustache_Tokenizer::NAME],
+                            $parent[Mustache_Tokenizer::LINE],
+                            $tokenDynamic ? '*' : '',
+                            $token[Mustache_Tokenizer::NAME],
+                            $token[Mustache_Tokenizer::LINE]
+                        );
+                        throw new Mustache_Exception_SyntaxException($msg, $token);
+                    }
+
+                    $this->clearStandaloneLines($nodes, $tokens);
+                    $parent[Mustache_Tokenizer::END]   = $token[Mustache_Tokenizer::INDEX];
+                    $parent[Mustache_Tokenizer::NODES] = $nodes;
+
+                    return $parent;
+
+                case Mustache_Tokenizer::T_PARTIAL:
+                    $this->checkIfTokenIsAllowedInParent($parent, $token);
+                    //store the whitespace prefix for laters!
+                    if ($indent = $this->clearStandaloneLines($nodes, $tokens)) {
+                        $token[Mustache_Tokenizer::INDENT] = $indent[Mustache_Tokenizer::VALUE];
+                    }
+                    $nodes[] = $token;
+                    break;
+
+                case Mustache_Tokenizer::T_PARENT:
+                    $this->checkIfTokenIsAllowedInParent($parent, $token);
+                    $nodes[] = $this->buildTree($tokens, $token);
+                    break;
+
+                case Mustache_Tokenizer::T_BLOCK_VAR:
+                    if ($this->pragmaBlocks) {
+                        // BLOCKS pragma is enabled, let's do this!
+                        if (isset($parent) && $parent[Mustache_Tokenizer::TYPE] === Mustache_Tokenizer::T_PARENT) {
+                            $token[Mustache_Tokenizer::TYPE] = Mustache_Tokenizer::T_BLOCK_ARG;
+                        }
+                        $this->clearStandaloneLines($nodes, $tokens);
+                        $nodes[] = $this->buildTree($tokens, $token);
+                    } else {
+                        // pretend this was just a normal "escaped" token...
+                        $token[Mustache_Tokenizer::TYPE] = Mustache_Tokenizer::T_ESCAPED;
+                        // TODO: figure out how to figure out if there was a space after this dollar:
+                        $token[Mustache_Tokenizer::NAME] = '$' . $token[Mustache_Tokenizer::NAME];
+                        $nodes[] = $token;
+                    }
+                    break;
+
+                case Mustache_Tokenizer::T_PRAGMA:
+                    $this->enablePragma($token[Mustache_Tokenizer::NAME]);
+                    // no break
+
+                case Mustache_Tokenizer::T_COMMENT:
+                    $this->clearStandaloneLines($nodes, $tokens);
+                    $nodes[] = $token;
+                    break;
+
+                default:
+                    $nodes[] = $token;
+                    break;
+            }
+        }
+
+        if (isset($parent)) {
+            $msg = sprintf(
+                'Missing closing tag: %s opened on line %d',
+                $parent[Mustache_Tokenizer::NAME],
+                $parent[Mustache_Tokenizer::LINE]
+            );
+            throw new Mustache_Exception_SyntaxException($msg, $parent);
+        }
+
+        return $nodes;
+    }
+
+    /**
+     * Clear standalone line tokens.
+     *
+     * Returns a whitespace token for indenting partials, if applicable.
+     *
+     * @param array $nodes  Parsed nodes
+     * @param array $tokens Tokens to be parsed
+     *
+     * @return array|null Resulting indent token, if any
+     */
+    private function clearStandaloneLines(array &$nodes, array &$tokens)
+    {
+        if ($this->lineTokens > 1) {
+            // this is the third or later node on this line, so it can't be standalone
+            return;
+        }
+
+        $prev = null;
+        if ($this->lineTokens === 1) {
+            // this is the second node on this line, so it can't be standalone
+            // unless the previous node is whitespace.
+            if ($prev = end($nodes)) {
+                if (!$this->tokenIsWhitespace($prev)) {
+                    return;
+                }
+            }
+        }
+
+        if ($next = reset($tokens)) {
+            // If we're on a new line, bail.
+            if ($next[Mustache_Tokenizer::LINE] !== $this->lineNum) {
+                return;
+            }
+
+            // If the next token isn't whitespace, bail.
+            if (!$this->tokenIsWhitespace($next)) {
+                return;
+            }
+
+            if (count($tokens) !== 1) {
+                // Unless it's the last token in the template, the next token
+                // must end in newline for this to be standalone.
+                if (substr($next[Mustache_Tokenizer::VALUE], -1) !== "\n") {
+                    return;
+                }
+            }
+
+            // Discard the whitespace suffix
+            array_shift($tokens);
+        }
+
+        if ($prev) {
+            // Return the whitespace prefix, if any
+            return array_pop($nodes);
+        }
+    }
+
+    /**
+     * Check whether token is a whitespace token.
+     *
+     * True if token type is T_TEXT and value is all whitespace characters.
+     *
+     * @param array $token
+     *
+     * @return bool True if token is a whitespace token
+     */
+    private function tokenIsWhitespace(array $token)
+    {
+        if ($token[Mustache_Tokenizer::TYPE] === Mustache_Tokenizer::T_TEXT) {
+            return preg_match('/^\s*$/', $token[Mustache_Tokenizer::VALUE]);
+        }
+
+        return false;
+    }
+
+    /**
+     * Check whether a token is allowed inside a parent tag.
+     *
+     * @throws Mustache_Exception_SyntaxException if an invalid token is found inside a parent tag
+     *
+     * @param array|null $parent
+     * @param array      $token
+     */
+    private function checkIfTokenIsAllowedInParent($parent, array $token)
+    {
+        if (isset($parent) && $parent[Mustache_Tokenizer::TYPE] === Mustache_Tokenizer::T_PARENT) {
+            throw new Mustache_Exception_SyntaxException('Illegal content in < parent tag', $token);
+        }
+    }
+
+    /**
+     * Parse dynamic names.
+     *
+     * @throws Mustache_Exception_SyntaxException when a tag does not allow *
+     * @throws Mustache_Exception_SyntaxException on multiple *s, or dots or filters with *
+     */
+    private function getDynamicName(array $token)
+    {
+        $name = $token[Mustache_Tokenizer::NAME];
+        $isDynamic = false;
+
+        if (preg_match('/^\s*\*\s*/', $name)) {
+            $this->ensureTagAllowsDynamicNames($token);
+            $name = preg_replace('/^\s*\*\s*/', '', $name);
+            $isDynamic = true;
+        }
+
+        return array($name, $isDynamic);
+    }
+
+    /**
+     * Check whether the given token supports dynamic tag names.
+     *
+     * @throws Mustache_Exception_SyntaxException when a tag does not allow *
+     *
+     * @param array $token
+     */
+    private function ensureTagAllowsDynamicNames(array $token)
+    {
+        switch ($token[Mustache_Tokenizer::TYPE]) {
+            case Mustache_Tokenizer::T_PARTIAL:
+            case Mustache_Tokenizer::T_PARENT:
+            case Mustache_Tokenizer::T_END_SECTION:
+                return;
+        }
+
+        $msg = sprintf(
+            'Invalid dynamic name: %s in %s tag',
+            $token[Mustache_Tokenizer::NAME],
+            Mustache_Tokenizer::getTagName($token[Mustache_Tokenizer::TYPE])
+        );
+
+        throw new Mustache_Exception_SyntaxException($msg, $token);
+    }
+
+
+    /**
+     * Split a tag name into name and filters.
+     *
+     * @param string $name
+     *
+     * @return array [Tag name, Array of filters]
+     */
+    private function getNameAndFilters($name)
+    {
+        $filters = array_map('trim', explode('|', $name));
+        $name    = array_shift($filters);
+
+        return array($name, $filters);
+    }
+
+    /**
+     * Enable a pragma.
+     *
+     * @param string $name
+     */
+    private function enablePragma($name)
+    {
+        $this->pragmas[$name] = true;
+
+        switch ($name) {
+            case Mustache_Engine::PRAGMA_BLOCKS:
+                $this->pragmaBlocks = true;
+                break;
+
+            case Mustache_Engine::PRAGMA_FILTERS:
+                $this->pragmaFilters = true;
+                break;
+
+            case Mustache_Engine::PRAGMA_DYNAMIC_NAMES:
+                $this->pragmaDynamicNames = true;
+                break;
+        }
+    }
+}
diff --git a/Mustache/Source.php b/Mustache/Source.php
new file mode 100644
index 00000000..278c2cb3
--- /dev/null
+++ b/Mustache/Source.php
@@ -0,0 +1,40 @@
+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Mustache template Source interface.
+ */
+interface Mustache_Source
+{
+    /**
+     * Get the Source key (used to generate the compiled class name).
+     *
+     * This must return a distinct key for each template source. For example, an
+     * MD5 hash of the template contents would probably do the trick. The
+     * ProductionFilesystemLoader uses mtime and file path. If your production
+     * source directory is under version control, you could use the current Git
+     * rev and the file path...
+     *
+     * @throws RuntimeException when a source file cannot be read
+     *
+     * @return string
+     */
+    public function getKey();
+
+    /**
+     * Get the template Source.
+     *
+     * @throws RuntimeException when a source file cannot be read
+     *
+     * @return string
+     */
+    public function getSource();
+}
diff --git a/Mustache/Source/FilesystemSource.php b/Mustache/Source/FilesystemSource.php
new file mode 100644
index 00000000..270f584e
--- /dev/null
+++ b/Mustache/Source/FilesystemSource.php
@@ -0,0 +1,77 @@
+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Mustache template Filesystem Source.
+ *
+ * This template Source uses stat() to generate the Source key, so that using
+ * pre-compiled templates doesn't require hitting the disk to read the source.
+ * It is more suitable for production use, and is used by default in the
+ * ProductionFilesystemLoader.
+ */
+class Mustache_Source_FilesystemSource implements Mustache_Source
+{
+    private $fileName;
+    private $statProps;
+    private $stat;
+
+    /**
+     * Filesystem Source constructor.
+     *
+     * @param string $fileName
+     * @param array  $statProps
+     */
+    public function __construct($fileName, array $statProps)
+    {
+        $this->fileName = $fileName;
+        $this->statProps = $statProps;
+    }
+
+    /**
+     * Get the Source key (used to generate the compiled class name).
+     *
+     * @throws Mustache_Exception_RuntimeException when a source file cannot be read
+     *
+     * @return string
+     */
+    public function getKey()
+    {
+        $chunks = array(
+            'fileName' => $this->fileName,
+        );
+
+        if (!empty($this->statProps)) {
+            if (!isset($this->stat)) {
+                $this->stat = @stat($this->fileName);
+            }
+
+            if ($this->stat === false) {
+                throw new Mustache_Exception_RuntimeException(sprintf('Failed to read source file "%s".', $this->fileName));
+            }
+
+            foreach ($this->statProps as $prop) {
+                $chunks[$prop] = $this->stat[$prop];
+            }
+        }
+
+        return json_encode($chunks);
+    }
+
+    /**
+     * Get the template Source.
+     *
+     * @return string
+     */
+    public function getSource()
+    {
+        return file_get_contents($this->fileName);
+    }
+}
diff --git a/Mustache/Template.php b/Mustache/Template.php
index ebb9df8c..4de82393 100644
--- a/Mustache/Template.php
+++ b/Mustache/Template.php
@@ -1,149 +1,180 @@
-<?php

-

-/*

- * This file is part of Mustache.php.

- *

- * (c) 2012 Justin Hileman

- *

- * For the full copyright and license information, please view the LICENSE

- * file that was distributed with this source code.

- */

-

-/**

- * Abstract Mustache Template class.

- *

- * @abstract

- */

-abstract class Mustache_Template

-{

-

-    /**

-     * @var Mustache_Engine

-     */

-    protected $mustache;

-

-    /**

-     * Mustache Template constructor.

-     *

-     * @param Mustache_Engine $mustache

-     */

-    public function __construct(Mustache_Engine $mustache)

-    {

-        $this->mustache = $mustache;

-    }

-

-    /**

-     * Mustache Template instances can be treated as a function and rendered by simply calling them:

-     *

-     *     $m = new Mustache_Engine;

-     *     $tpl = $m->loadTemplate('Hello, {{ name }}!');

-     *     echo $tpl(array('name' => 'World')); // "Hello, World!"

-     *

-     * @see Mustache_Template::render

-     *

-     * @param mixed $context Array or object rendering context (default: array())

-     *

-     * @return string Rendered template

-     */

-    public function __invoke($context = array())

-    {

-        return $this->render($context);

-    }

-

-    /**

-     * Render this template given the rendering context.

-     *

-     * @param mixed $context Array or object rendering context (default: array())

-     *

-     * @return string Rendered template

-     */

-    public function render($context = array())

-    {

-        return $this->renderInternal($this->prepareContextStack($context));

-    }

-

-    /**

-     * Internal rendering method implemented by Mustache Template concrete subclasses.

-     *

-     * This is where the magic happens :)

-     *

-     * @param Mustache_Context $context

-     * @param string           $indent  (default: '')

-     * @param bool             $escape  (default: false)

-     *

-     * @return string Rendered template

-     */

-    abstract public function renderInternal(Mustache_Context $context, $indent = '', $escape = false);

-

-    /**

-     * Tests whether a value should be iterated over (e.g. in a section context).

-     *

-     * In most languages there are two distinct array types: list and hash (or whatever you want to call them). Lists

-     * should be iterated, hashes should be treated as objects. Mustache follows this paradigm for Ruby, Javascript,

-     * Java, Python, etc.

-     *

-     * PHP, however, treats lists and hashes as one primitive type: array. So Mustache.php needs a way to distinguish

-     * between between a list of things (numeric, normalized array) and a set of variables to be used as section context

-     * (associative array). In other words, this will be iterated over:

-     *

-     *     $items = array(

-     *         array('name' => 'foo'),

-     *         array('name' => 'bar'),

-     *         array('name' => 'baz'),

-     *     );

-     *

-     * ... but this will be used as a section context block:

-     *

-     *     $items = array(

-     *         1        => array('name' => 'foo'),

-     *         'banana' => array('name' => 'bar'),

-     *         42       => array('name' => 'baz'),

-     *     );

-     *

-     * @param mixed $value

-     *

-     * @return boolean True if the value is 'iterable'

-     */

-    protected function isIterable($value)

-    {

-        if (is_object($value)) {

-            return $value instanceof Traversable;

-        } elseif (is_array($value)) {

-            $i = 0;

-            foreach ($value as $k => $v) {

-                if ($k !== $i++) {

-                    return false;

-                }

-            }

-

-            return true;

-        } else {

-            return false;

-        }

-    }

-

-    /**

-     * Helper method to prepare the Context stack.

-     *

-     * Adds the Mustache HelperCollection to the stack's top context frame if helpers are present.

-     *

-     * @param mixed $context Optional first context frame (default: null)

-     *

-     * @return Mustache_Context

-     */

-    protected function prepareContextStack($context = null)

-    {

-        $stack = new Mustache_Context;

-

-        $helpers = $this->mustache->getHelpers();

-        if (!$helpers->isEmpty()) {

-            $stack->push($helpers);

-        }

-

-        if (!empty($context)) {

-            $stack->push($context);

-        }

-

-        return $stack;

-    }

-}

+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Abstract Mustache Template class.
+ *
+ * @abstract
+ */
+abstract class Mustache_Template
+{
+    /**
+     * @var Mustache_Engine
+     */
+    protected $mustache;
+
+    /**
+     * @var bool
+     */
+    protected $strictCallables = false;
+
+    /**
+     * Mustache Template constructor.
+     *
+     * @param Mustache_Engine $mustache
+     */
+    public function __construct(Mustache_Engine $mustache)
+    {
+        $this->mustache = $mustache;
+    }
+
+    /**
+     * Mustache Template instances can be treated as a function and rendered by simply calling them.
+     *
+     *     $m = new Mustache_Engine;
+     *     $tpl = $m->loadTemplate('Hello, {{ name }}!');
+     *     echo $tpl(array('name' => 'World')); // "Hello, World!"
+     *
+     * @see Mustache_Template::render
+     *
+     * @param mixed $context Array or object rendering context (default: array())
+     *
+     * @return string Rendered template
+     */
+    public function __invoke($context = array())
+    {
+        return $this->render($context);
+    }
+
+    /**
+     * Render this template given the rendering context.
+     *
+     * @param mixed $context Array or object rendering context (default: array())
+     *
+     * @return string Rendered template
+     */
+    public function render($context = array())
+    {
+        return $this->renderInternal(
+            $this->prepareContextStack($context)
+        );
+    }
+
+    /**
+     * Internal rendering method implemented by Mustache Template concrete subclasses.
+     *
+     * This is where the magic happens :)
+     *
+     * NOTE: This method is not part of the Mustache.php public API.
+     *
+     * @param Mustache_Context $context
+     * @param string           $indent  (default: '')
+     *
+     * @return string Rendered template
+     */
+    abstract public function renderInternal(Mustache_Context $context, $indent = '');
+
+    /**
+     * Tests whether a value should be iterated over (e.g. in a section context).
+     *
+     * In most languages there are two distinct array types: list and hash (or whatever you want to call them). Lists
+     * should be iterated, hashes should be treated as objects. Mustache follows this paradigm for Ruby, Javascript,
+     * Java, Python, etc.
+     *
+     * PHP, however, treats lists and hashes as one primitive type: array. So Mustache.php needs a way to distinguish
+     * between between a list of things (numeric, normalized array) and a set of variables to be used as section context
+     * (associative array). In other words, this will be iterated over:
+     *
+     *     $items = array(
+     *         array('name' => 'foo'),
+     *         array('name' => 'bar'),
+     *         array('name' => 'baz'),
+     *     );
+     *
+     * ... but this will be used as a section context block:
+     *
+     *     $items = array(
+     *         1        => array('name' => 'foo'),
+     *         'banana' => array('name' => 'bar'),
+     *         42       => array('name' => 'baz'),
+     *     );
+     *
+     * @param mixed $value
+     *
+     * @return bool True if the value is 'iterable'
+     */
+    protected function isIterable($value)
+    {
+        switch (gettype($value)) {
+            case 'object':
+                return $value instanceof Traversable;
+
+            case 'array':
+                $i = 0;
+                foreach ($value as $k => $v) {
+                    if ($k !== $i++) {
+                        return false;
+                    }
+                }
+
+                return true;
+
+            default:
+                return false;
+        }
+    }
+
+    /**
+     * Helper method to prepare the Context stack.
+     *
+     * Adds the Mustache HelperCollection to the stack's top context frame if helpers are present.
+     *
+     * @param mixed $context Optional first context frame (default: null)
+     *
+     * @return Mustache_Context
+     */
+    protected function prepareContextStack($context = null)
+    {
+        $stack = new Mustache_Context();
+
+        $helpers = $this->mustache->getHelpers();
+        if (!$helpers->isEmpty()) {
+            $stack->push($helpers);
+        }
+
+        if (!empty($context)) {
+            $stack->push($context);
+        }
+
+        return $stack;
+    }
+
+    /**
+     * Resolve a context value.
+     *
+     * Invoke the value if it is callable, otherwise return the value.
+     *
+     * @param mixed            $value
+     * @param Mustache_Context $context
+     *
+     * @return string
+     */
+    protected function resolveValue($value, Mustache_Context $context)
+    {
+        if (($this->strictCallables ? is_object($value) : !is_string($value)) && is_callable($value)) {
+            return $this->mustache
+                ->loadLambda((string) call_user_func($value))
+                ->renderInternal($context);
+        }
+
+        return $value;
+    }
+}
diff --git a/Mustache/Tokenizer.php b/Mustache/Tokenizer.php
index fd866e30..d96f1298 100644
--- a/Mustache/Tokenizer.php
+++ b/Mustache/Tokenizer.php
@@ -1,286 +1,408 @@
-<?php

-

-/*

- * This file is part of Mustache.php.

- *

- * (c) 2012 Justin Hileman

- *

- * For the full copyright and license information, please view the LICENSE

- * file that was distributed with this source code.

- */

-

-/**

- * Mustache Tokenizer class.

- *

- * This class is responsible for turning raw template source into a set of Mustache tokens.

- */

-class Mustache_Tokenizer

-{

-

-    // Finite state machine states

-    const IN_TEXT     = 0;

-    const IN_TAG_TYPE = 1;

-    const IN_TAG      = 2;

-

-    // Token types

-    const T_SECTION      = '#';

-    const T_INVERTED     = '^';

-    const T_END_SECTION  = '/';

-    const T_COMMENT      = '!';

-    const T_PARTIAL      = '>';

-    const T_PARTIAL_2    = '<';

-    const T_DELIM_CHANGE = '=';

-    const T_ESCAPED      = '_v';

-    const T_UNESCAPED    = '{';

-    const T_UNESCAPED_2  = '&';

-    const T_TEXT         = '_t';

-

-    // Valid token types

-    private static $tagTypes = array(

-        self::T_SECTION      => true,

-        self::T_INVERTED     => true,

-        self::T_END_SECTION  => true,

-        self::T_COMMENT      => true,

-        self::T_PARTIAL      => true,

-        self::T_PARTIAL_2    => true,

-        self::T_DELIM_CHANGE => true,

-        self::T_ESCAPED      => true,

-        self::T_UNESCAPED    => true,

-        self::T_UNESCAPED_2  => true,

-    );

-

-    // Interpolated tags

-    private static $interpolatedTags = array(

-        self::T_ESCAPED      => true,

-        self::T_UNESCAPED    => true,

-        self::T_UNESCAPED_2  => true,

-    );

-

-    // Token properties

-    const TYPE   = 'type';

-    const NAME   = 'name';

-    const OTAG   = 'otag';

-    const CTAG   = 'ctag';

-    const INDEX  = 'index';

-    const END    = 'end';

-    const INDENT = 'indent';

-    const NODES  = 'nodes';

-    const VALUE  = 'value';

-

-    private $state;

-    private $tagType;

-    private $tag;

-    private $buffer;

-    private $tokens;

-    private $seenTag;

-    private $lineStart;

-    private $otag;

-    private $ctag;

-

-    /**

-     * Scan and tokenize template source.

-     *

-     * @param string $text       Mustache template source to tokenize

-     * @param string $delimiters Optionally, pass initial opening and closing delimiters (default: null)

-     *

-     * @return array Set of Mustache tokens

-     */

-    public function scan($text, $delimiters = null)

-    {

-        $this->reset();

-

-        if ($delimiters = trim($delimiters)) {

-            list($otag, $ctag) = explode(' ', $delimiters);

-            $this->otag = $otag;

-            $this->ctag = $ctag;

-        }

-

-        $len = strlen($text);

-        for ($i = 0; $i < $len; $i++) {

-            switch ($this->state) {

-                case self::IN_TEXT:

-                    if ($this->tagChange($this->otag, $text, $i)) {

-                        $i--;

-                        $this->flushBuffer();

-                        $this->state = self::IN_TAG_TYPE;

-                    } else {

-                        if ($text[$i] == "\n") {

-                            $this->filterLine();

-                        } else {

-                            $this->buffer .= $text[$i];

-                        }

-                    }

-                    break;

-

-                case self::IN_TAG_TYPE:

-

-                    $i += strlen($this->otag) - 1;

-                    if (isset(self::$tagTypes[$text[$i + 1]])) {

-                        $tag = $text[$i + 1];

-                        $this->tagType = $tag;

-                    } else {

-                        $tag = null;

-                        $this->tagType = self::T_ESCAPED;

-                    }

-

-                    if ($this->tagType === self::T_DELIM_CHANGE) {

-                        $i = $this->changeDelimiters($text, $i);

-                        $this->state = self::IN_TEXT;

-                    } else {

-                        if ($tag !== null) {

-                            $i++;

-                        }

-                        $this->state = self::IN_TAG;

-                    }

-                    $this->seenTag = $i;

-                    break;

-

-                default:

-                    if ($this->tagChange($this->ctag, $text, $i)) {

-                        $this->tokens[] = array(

-                            self::TYPE  => $this->tagType,

-                            self::NAME  => trim($this->buffer),

-                            self::OTAG  => $this->otag,

-                            self::CTAG  => $this->ctag,

-                            self::INDEX => ($this->tagType == self::T_END_SECTION) ? $this->seenTag - strlen($this->otag) : $i + strlen($this->ctag)

-                        );

-

-                        $this->buffer = '';

-                        $i += strlen($this->ctag) - 1;

-                        $this->state = self::IN_TEXT;

-                        if ($this->tagType == self::T_UNESCAPED) {

-                            if ($this->ctag == '}}') {

-                                $i++;

-                            } else {

-                                // Clean up `{{{ tripleStache }}}` style tokens.

-                                $lastName = $this->tokens[count($this->tokens) - 1][self::NAME];

-                                if (substr($lastName, -1) === '}') {

-                                    $this->tokens[count($this->tokens) - 1][self::NAME] = trim(substr($lastName, 0, -1));

-                                }

-                            }

-                        }

-                    } else {

-                        $this->buffer .= $text[$i];

-                    }

-                    break;

-            }

-        }

-

-        $this->filterLine(true);

-

-        return $this->tokens;

-    }

-

-    /**

-     * Helper function to reset tokenizer internal state.

-     */

-    private function reset()

-    {

-        $this->state     = self::IN_TEXT;

-        $this->tagType   = null;

-        $this->tag       = null;

-        $this->buffer    = '';

-        $this->tokens    = array();

-        $this->seenTag   = false;

-        $this->lineStart = 0;

-        $this->otag      = '{{';

-        $this->ctag      = '}}';

-    }

-

-    /**

-     * Flush the current buffer to a token.

-     */

-    private function flushBuffer()

-    {

-        if (!empty($this->buffer)) {

-            $this->tokens[] = array(self::TYPE  => self::T_TEXT, self::VALUE => $this->buffer);

-            $this->buffer   = '';

-        }

-    }

-

-    /**

-     * Test whether the current line is entirely made up of whitespace.

-     *

-     * @return boolean True if the current line is all whitespace

-     */

-    private function lineIsWhitespace()

-    {

-        $tokensCount = count($this->tokens);

-        for ($j = $this->lineStart; $j < $tokensCount; $j++) {

-            $token = $this->tokens[$j];

-            if (isset(self::$tagTypes[$token[self::TYPE]])) {

-                if (isset(self::$interpolatedTags[$token[self::TYPE]])) {

-                    return false;

-                }

-            } elseif ($token[self::TYPE] == self::T_TEXT) {

-                if (preg_match('/\S/', $token[self::VALUE])) {

-                    return false;

-                }

-            }

-        }

-

-        return true;

-    }

-

-    /**

-     * Filter out whitespace-only lines and store indent levels for partials.

-     *

-     * @param bool $noNewLine Suppress the newline? (default: false)

-     */

-    private function filterLine($noNewLine = false)

-    {

-        $this->flushBuffer();

-        if ($this->seenTag && $this->lineIsWhitespace()) {

-            $tokensCount = count($this->tokens);

-            for ($j = $this->lineStart; $j < $tokensCount; $j++) {

-                if ($this->tokens[$j][self::TYPE] == self::T_TEXT) {

-                    if (isset($this->tokens[$j+1]) && $this->tokens[$j+1][self::TYPE] == self::T_PARTIAL) {

-                        $this->tokens[$j+1][self::INDENT] = $this->tokens[$j][self::VALUE];

-                    }

-

-                    $this->tokens[$j] = null;

-                }

-            }

-        } elseif (!$noNewLine) {

-            $this->tokens[] = array(self::TYPE => self::T_TEXT, self::VALUE => "\n");

-        }

-

-        $this->seenTag   = false;

-        $this->lineStart = count($this->tokens);

-    }

-

-    /**

-     * Change the current Mustache delimiters. Set new `otag` and `ctag` values.

-     *

-     * @param string $text  Mustache template source

-     * @param int    $index Current tokenizer index

-     *

-     * @return int New index value

-     */

-    private function changeDelimiters($text, $index)

-    {

-        $startIndex = strpos($text, '=', $index) + 1;

-        $close      = '='.$this->ctag;

-        $closeIndex = strpos($text, $close, $index);

-

-        list($otag, $ctag) = explode(' ', trim(substr($text, $startIndex, $closeIndex - $startIndex)));

-        $this->otag = $otag;

-        $this->ctag = $ctag;

-

-        return $closeIndex + strlen($close) - 1;

-    }

-

-    /**

-     * Test whether it's time to change tags.

-     *

-     * @param string $tag   Current tag name

-     * @param string $text  Mustache template source

-     * @param int    $index Current tokenizer index

-     *

-     * @return boolean True if this is a closing section tag

-     */

-    private function tagChange($tag, $text, $index)

-    {

-        return substr($text, $index, strlen($tag)) === $tag;

-    }

-}

+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2010-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Mustache Tokenizer class.
+ *
+ * This class is responsible for turning raw template source into a set of Mustache tokens.
+ */
+class Mustache_Tokenizer
+{
+    // Finite state machine states
+    const IN_TEXT     = 0;
+    const IN_TAG_TYPE = 1;
+    const IN_TAG      = 2;
+
+    // Token types
+    const T_SECTION      = '#';
+    const T_INVERTED     = '^';
+    const T_END_SECTION  = '/';
+    const T_COMMENT      = '!';
+    const T_PARTIAL      = '>';
+    const T_PARENT       = '<';
+    const T_DELIM_CHANGE = '=';
+    const T_ESCAPED      = '_v';
+    const T_UNESCAPED    = '{';
+    const T_UNESCAPED_2  = '&';
+    const T_TEXT         = '_t';
+    const T_PRAGMA       = '%';
+    const T_BLOCK_VAR    = '$';
+    const T_BLOCK_ARG    = '$arg';
+
+    // Valid token types
+    private static $tagTypes = array(
+        self::T_SECTION      => true,
+        self::T_INVERTED     => true,
+        self::T_END_SECTION  => true,
+        self::T_COMMENT      => true,
+        self::T_PARTIAL      => true,
+        self::T_PARENT       => true,
+        self::T_DELIM_CHANGE => true,
+        self::T_ESCAPED      => true,
+        self::T_UNESCAPED    => true,
+        self::T_UNESCAPED_2  => true,
+        self::T_PRAGMA       => true,
+        self::T_BLOCK_VAR    => true,
+    );
+
+    private static $tagNames = array(
+        self::T_SECTION      => 'section',
+        self::T_INVERTED     => 'inverted section',
+        self::T_END_SECTION  => 'section end',
+        self::T_COMMENT      => 'comment',
+        self::T_PARTIAL      => 'partial',
+        self::T_PARENT       => 'parent',
+        self::T_DELIM_CHANGE => 'set delimiter',
+        self::T_ESCAPED      => 'variable',
+        self::T_UNESCAPED    => 'unescaped variable',
+        self::T_UNESCAPED_2  => 'unescaped variable',
+        self::T_PRAGMA       => 'pragma',
+        self::T_BLOCK_VAR    => 'block variable',
+        self::T_BLOCK_ARG    => 'block variable',
+    );
+
+    // Token properties
+    const TYPE    = 'type';
+    const NAME    = 'name';
+    const DYNAMIC = 'dynamic';
+    const OTAG    = 'otag';
+    const CTAG    = 'ctag';
+    const LINE    = 'line';
+    const INDEX   = 'index';
+    const END     = 'end';
+    const INDENT  = 'indent';
+    const NODES   = 'nodes';
+    const VALUE   = 'value';
+    const FILTERS = 'filters';
+
+    private $state;
+    private $tagType;
+    private $buffer;
+    private $tokens;
+    private $seenTag;
+    private $line;
+
+    private $otag;
+    private $otagChar;
+    private $otagLen;
+
+    private $ctag;
+    private $ctagChar;
+    private $ctagLen;
+
+    /**
+     * Scan and tokenize template source.
+     *
+     * @throws Mustache_Exception_SyntaxException when mismatched section tags are encountered
+     * @throws Mustache_Exception_InvalidArgumentException when $delimiters string is invalid
+     *
+     * @param string $text       Mustache template source to tokenize
+     * @param string $delimiters Optionally, pass initial opening and closing delimiters (default: empty string)
+     *
+     * @return array Set of Mustache tokens
+     */
+    public function scan($text, $delimiters = '')
+    {
+        // Setting mbstring.func_overload makes things *really* slow.
+        // Let's do everyone a favor and scan this string as ASCII instead.
+        //
+        // The INI directive was removed in PHP 8.0 so we don't need to check there (and can drop it
+        // when we remove support for older versions of PHP).
+        //
+        // @codeCoverageIgnoreStart
+        $encoding = null;
+        if (version_compare(PHP_VERSION, '8.0.0', '<')) {
+            if (function_exists('mb_internal_encoding') && ini_get('mbstring.func_overload') & 2) {
+                $encoding = mb_internal_encoding();
+                mb_internal_encoding('ASCII');
+            }
+        }
+        // @codeCoverageIgnoreEnd
+
+        $this->reset();
+
+        if (is_string($delimiters) && $delimiters = trim($delimiters)) {
+            $this->setDelimiters($delimiters);
+        }
+
+        $len = strlen($text);
+        for ($i = 0; $i < $len; $i++) {
+            switch ($this->state) {
+                case self::IN_TEXT:
+                    $char = $text[$i];
+                    // Test whether it's time to change tags.
+                    if ($char === $this->otagChar && substr($text, $i, $this->otagLen) === $this->otag) {
+                        $i--;
+                        $this->flushBuffer();
+                        $this->state = self::IN_TAG_TYPE;
+                    } else {
+                        $this->buffer .= $char;
+                        if ($char === "\n") {
+                            $this->flushBuffer();
+                            $this->line++;
+                        }
+                    }
+                    break;
+
+                case self::IN_TAG_TYPE:
+                    $i += $this->otagLen - 1;
+                    $char = $text[$i + 1];
+                    if (isset(self::$tagTypes[$char])) {
+                        $tag = $char;
+                        $this->tagType = $tag;
+                    } else {
+                        $tag = null;
+                        $this->tagType = self::T_ESCAPED;
+                    }
+
+                    if ($this->tagType === self::T_DELIM_CHANGE) {
+                        $i = $this->changeDelimiters($text, $i);
+                        $this->state = self::IN_TEXT;
+                    } elseif ($this->tagType === self::T_PRAGMA) {
+                        $i = $this->addPragma($text, $i);
+                        $this->state = self::IN_TEXT;
+                    } else {
+                        if ($tag !== null) {
+                            $i++;
+                        }
+                        $this->state = self::IN_TAG;
+                    }
+                    $this->seenTag = $i;
+                    break;
+
+                default:
+                    $char = $text[$i];
+                    // Test whether it's time to change tags.
+                    if ($char === $this->ctagChar && substr($text, $i, $this->ctagLen) === $this->ctag) {
+                        $token = array(
+                            self::TYPE  => $this->tagType,
+                            self::NAME  => trim($this->buffer),
+                            self::OTAG  => $this->otag,
+                            self::CTAG  => $this->ctag,
+                            self::LINE  => $this->line,
+                            self::INDEX => ($this->tagType === self::T_END_SECTION) ? $this->seenTag - $this->otagLen : $i + $this->ctagLen,
+                        );
+
+                        if ($this->tagType === self::T_UNESCAPED) {
+                            // Clean up `{{{ tripleStache }}}` style tokens.
+                            if ($this->ctag === '}}') {
+                                if (($i + 2 < $len) && $text[$i + 2] === '}') {
+                                    $i++;
+                                } else {
+                                    $msg = sprintf(
+                                        'Mismatched tag delimiters: %s on line %d',
+                                        $token[self::NAME],
+                                        $token[self::LINE]
+                                    );
+
+                                    throw new Mustache_Exception_SyntaxException($msg, $token);
+                                }
+                            } else {
+                                $lastName = $token[self::NAME];
+                                if (substr($lastName, -1) === '}') {
+                                    $token[self::NAME] = trim(substr($lastName, 0, -1));
+                                } else {
+                                    $msg = sprintf(
+                                        'Mismatched tag delimiters: %s on line %d',
+                                        $token[self::NAME],
+                                        $token[self::LINE]
+                                    );
+
+                                    throw new Mustache_Exception_SyntaxException($msg, $token);
+                                }
+                            }
+                        }
+
+                        $this->buffer = '';
+                        $i += $this->ctagLen - 1;
+                        $this->state = self::IN_TEXT;
+                        $this->tokens[] = $token;
+                    } else {
+                        $this->buffer .= $char;
+                    }
+                    break;
+            }
+        }
+
+        if ($this->state !== self::IN_TEXT) {
+            $this->throwUnclosedTagException();
+        }
+
+        $this->flushBuffer();
+
+        // Restore the user's encoding...
+        // @codeCoverageIgnoreStart
+        if ($encoding) {
+            mb_internal_encoding($encoding);
+        }
+        // @codeCoverageIgnoreEnd
+
+        return $this->tokens;
+    }
+
+    /**
+     * Helper function to reset tokenizer internal state.
+     */
+    private function reset()
+    {
+        $this->state    = self::IN_TEXT;
+        $this->tagType  = null;
+        $this->buffer   = '';
+        $this->tokens   = array();
+        $this->seenTag  = false;
+        $this->line     = 0;
+
+        $this->otag     = '{{';
+        $this->otagChar = '{';
+        $this->otagLen  = 2;
+
+        $this->ctag     = '}}';
+        $this->ctagChar = '}';
+        $this->ctagLen  = 2;
+    }
+
+    /**
+     * Flush the current buffer to a token.
+     */
+    private function flushBuffer()
+    {
+        if (strlen($this->buffer) > 0) {
+            $this->tokens[] = array(
+                self::TYPE  => self::T_TEXT,
+                self::LINE  => $this->line,
+                self::VALUE => $this->buffer,
+            );
+            $this->buffer   = '';
+        }
+    }
+
+    /**
+     * Change the current Mustache delimiters. Set new `otag` and `ctag` values.
+     *
+     * @throws Mustache_Exception_SyntaxException when delimiter string is invalid
+     *
+     * @param string $text  Mustache template source
+     * @param int    $index Current tokenizer index
+     *
+     * @return int New index value
+     */
+    private function changeDelimiters($text, $index)
+    {
+        $startIndex = strpos($text, '=', $index) + 1;
+        $close      = '=' . $this->ctag;
+        $closeIndex = strpos($text, $close, $index);
+
+        if ($closeIndex === false) {
+            $this->throwUnclosedTagException();
+        }
+
+        $token = array(
+            self::TYPE => self::T_DELIM_CHANGE,
+            self::LINE => $this->line,
+        );
+
+        try {
+            $this->setDelimiters(trim(substr($text, $startIndex, $closeIndex - $startIndex)));
+        } catch (Mustache_Exception_InvalidArgumentException $e) {
+            throw new Mustache_Exception_SyntaxException($e->getMessage(), $token);
+        }
+
+        $this->tokens[] = $token;
+
+        return $closeIndex + strlen($close) - 1;
+    }
+
+    /**
+     * Set the current Mustache `otag` and `ctag` delimiters.
+     *
+     * @throws Mustache_Exception_InvalidArgumentException when delimiter string is invalid
+     *
+     * @param string $delimiters
+     */
+    private function setDelimiters($delimiters)
+    {
+        if (!preg_match('/^\s*(\S+)\s+(\S+)\s*$/', $delimiters, $matches)) {
+            throw new Mustache_Exception_InvalidArgumentException(sprintf('Invalid delimiters: %s', $delimiters));
+        }
+
+        list($_, $otag, $ctag) = $matches;
+
+        $this->otag     = $otag;
+        $this->otagChar = $otag[0];
+        $this->otagLen  = strlen($otag);
+
+        $this->ctag     = $ctag;
+        $this->ctagChar = $ctag[0];
+        $this->ctagLen  = strlen($ctag);
+    }
+
+    /**
+     * Add pragma token.
+     *
+     * Pragmas are hoisted to the front of the template, so all pragma tokens
+     * will appear at the front of the token list.
+     *
+     * @param string $text
+     * @param int    $index
+     *
+     * @return int New index value
+     */
+    private function addPragma($text, $index)
+    {
+        $end    = strpos($text, $this->ctag, $index);
+        if ($end === false) {
+            $this->throwUnclosedTagException();
+        }
+
+        $pragma = trim(substr($text, $index + 2, $end - $index - 2));
+
+        // Pragmas are hoisted to the front of the template.
+        array_unshift($this->tokens, array(
+            self::TYPE => self::T_PRAGMA,
+            self::NAME => $pragma,
+            self::LINE => 0,
+        ));
+
+        return $end + $this->ctagLen - 1;
+    }
+
+
+    private function throwUnclosedTagException()
+    {
+        $name = trim($this->buffer);
+        if ($name !== '') {
+            $msg = sprintf('Unclosed tag: %s on line %d', $name, $this->line);
+        } else {
+            $msg = sprintf('Unclosed tag on line %d', $this->line);
+        }
+
+        throw new Mustache_Exception_SyntaxException($msg, array(
+            self::TYPE  => $this->tagType,
+            self::NAME  => $name,
+            self::OTAG  => $this->otag,
+            self::CTAG  => $this->ctag,
+            self::LINE  => $this->line,
+            self::INDEX => $this->seenTag - $this->otagLen,
+        ));
+    }
+
+    /**
+     * Get the human readable name for a tag type.
+     *
+     * @param string $tagType One of the tokenizer T_* constants
+     *
+     * @return string
+     */
+    static function getTagName($tagType)
+    {
+        return isset(self::$tagNames[$tagType]) ? self::$tagNames[$tagType] : 'unknown';
+    }
+}