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

1 files changed, 68 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;
+}