Rework template meta-magic

- No more implicit dependency on Boost.MPL
- Better documentation for template magic
- Move input handler policies to handler definitions where they belong
- Separate out event descriptions from handlers

2 files changed, 183 insertions, 0 deletions

diff --git a/src/input/detail/gen/gen_policyChain.cpp b/src/input/detail/gen/gen_policyChain.cpp
new file mode 100644
index 0000000..3e375ec
--- /dev/null
+++ b/src/input/detail/gen/gen_policyChain.cpp
@@ -0,0 +1,68 @@
+/*
+ # Copyright (c) 2009 - OpenSLX Project, Computer Center University of Freiburg
+ #
+ # This program is free software distributed under the GPL version 2.
+ # See http://openslx.org/COPYING
+ #
+ # If you have any feedback please consult http://openslx.org/feedback and
+ # send your suggestions, praise, or complaints to feedback@openslx.org
+ #
+ # General information about OpenSLX can be found at http://openslx.org/
+ # --------------------------------------------------------------------------
+ # detail/gen/gen_policyChain.cpp:
+ #  - generate the input_policy::detail::PolicyChain class
+ # --------------------------------------------------------------------------
+ */
+
+#include <iostream>
+
+using namespace std;
+
+#define NUM_POLICIES 8
+
+int main(int, char**)
+{
+	int i;
+
+	cout << "template<typename BaseCase";
+	for(i = 0; i < NUM_POLICIES; i++)
+	{
+		cout << ", typename P" << i;
+	}
+	cout << ">\nstruct PolicyChain :\npublic P0::template apply_<PolicyChain<BaseCase";
+	for(i = 1; i < NUM_POLICIES; i++)
+	{
+		cout << ", P" << i;
+	}
+	cout << ", void> >\n";
+	cout << "{};\n";
+
+	// Base case:
+	cout << "template<typename BaseCase>\n";
+	cout << "struct PolicyChain<BaseCase";
+	for(i = 0; i < NUM_POLICIES; i++)
+	{
+		cout << ", void";
+	}
+	cout << "> : public BaseCase {};\n";
+
+	// We need the following in macros:
+	cout << "#define _autogen_POLICY_TEMPLATE_PARAMS ";
+	for(i = 0; i < NUM_POLICIES; i++)
+	{
+		if(i)
+			cout << ", ";
+		cout << "typename P" << i;
+	}
+
+	cout << "\n#define _autogen_POLICY_TEMPLATE_ARGS ";
+	for(i = 0; i < NUM_POLICIES; i++)
+	{
+		if(i)
+			cout << ", ";
+		cout << "P" << i;
+	}
+	cout << "\n";
+
+	return 0;
+}
diff --git a/src/input/detail/gen/gen_typeList.cpp b/src/input/detail/gen/gen_typeList.cpp
new file mode 100644
index 0000000..e092b80
--- /dev/null
+++ b/src/input/detail/gen/gen_typeList.cpp
@@ -0,0 +1,115 @@
+/*
+ # Copyright (c) 2009 - OpenSLX Project, Computer Center University of Freiburg
+ #
+ # This program is free software distributed under the GPL version 2.
+ # See http://openslx.org/COPYING
+ #
+ # If you have any feedback please consult http://openslx.org/feedback and
+ # send your suggestions, praise, or complaints to feedback@openslx.org
+ #
+ # General information about OpenSLX can be found at http://openslx.org/
+ # --------------------------------------------------------------------------
+ # detail/gen/gen_policyChain.cpp:
+ #  - generate the input_policy::detail::TypeList class
+ # --------------------------------------------------------------------------
+ */
+
+#include <iostream>
+
+using namespace std;
+
+#define NUM_MAX_ENTRIES 16
+
+int main(int, char**)
+{
+	int i;
+
+	cout << "template<";
+	for(i = 0; i < NUM_MAX_ENTRIES; i++)
+	{
+		if(i)
+			cout << ", ";
+		cout << "typename T" << i << " = void";
+	}
+	cout << ">\nstruct TypeList {\n";
+	cout << "typedef T0 head;\n";
+	cout << "typedef TypeList<";
+	for(i = 1; i < NUM_MAX_ENTRIES; i++)
+	{
+		if(i > 1)
+			cout << ", ";
+		cout << "T" << i;
+	}
+	cout << ", void > tail;\n";
+	cout << "};\n";
+
+	// Contains:
+	cout << "template<typename Needle, typename Haystack>\n"
+			"struct Contains { static const int index = -1; static const bool value = false; };\n";
+
+	for(i = 0; i < NUM_MAX_ENTRIES; i++)
+	{
+		int j;
+
+		cout << "template<typename Needle";
+		for(j = 0; j < NUM_MAX_ENTRIES; j++)
+		{
+			if(j == i)
+				continue;
+			cout << ", typename T" << j;
+		}
+		cout << ">\nstruct Contains<Needle, TypeList<";
+		for(j = 0; j < NUM_MAX_ENTRIES; j++)
+		{
+			if(j)
+				cout << ", ";
+			if(j == i)
+				cout << "Needle";
+			else
+				cout << "T" << j;
+		}
+		cout << "> >\n{ static const int index = " << i << "; static const bool value = true; };\n";
+	}
+
+	// Empty List:
+	cout << "typedef TypeList<";
+	for(i = 0; i < NUM_MAX_ENTRIES; i++)
+	{
+		if(i)
+			cout << ", ";
+		cout << "void";
+	}
+	cout << " > EmptyList;\n";
+
+	// Macros:
+	cout << "#define IMPLICIT_TYPE_LIST_PARAMS(prefix) ";
+	for(i = 0; i < NUM_MAX_ENTRIES; i++)
+	{
+		if(i)
+			cout << ", ";
+		cout << "typename prefix##" << i << " = void";
+	}
+	cout << "\n";
+
+	cout << "#define IMPLICIT_TYPE_LIST_PARAMS_NODEFAULT(prefix) ";
+	for(i = 0; i < NUM_MAX_ENTRIES; i++)
+	{
+		if(i)
+			cout << ", ";
+		cout << "typename prefix##" << i;
+	}
+	cout << "\n";
+
+	cout << "#define IMPLICIT_TYPE_LIST_ARGS(prefix) ";
+	for(i = 0; i < NUM_MAX_ENTRIES; i++)
+	{
+		if(i)
+			cout << ", ";
+		cout << "prefix##" << i;
+	}
+	cout << "\n";
+
+	cout << "#define IMPLICIT_TYPE_LIST(prefix) ::input_policy::detail::TypeList<IMPLICIT_TYPE_LIST_ARGS(prefix) >\n";
+
+	return 0;
+}