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Bug fix for GCC compiler usage

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Removed old/original GCC implementation of EXPAND_WCB

git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@1813 7f0cb862-5218-0410-a997-914c9d46530a
This commit is contained in:
dcnieho 2017-06-30 23:21:34 +00:00
parent 658edf902d
commit 0209cd1ef5
1 changed files with 2 additions and 45 deletions
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47
freeglut/freeglut/src/fg_callback_macros.h
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@ -32,50 +32,6 @@
#error "fg_internal.h needs to be included before this header"
#endif
#if 0 /* old. Remove once other testing is complete */
/*
* EXPAND_WCB() is used as:
*
* EXPAND_WCB arg_list
*
* ... where {(arg_list)} is the parameter list.
*
* This will take the arg_list and extend it by one argument, adding
* the argument "userData" to the end of the list.
*
* All additional args are to get around trailing ',', argument counts,
* and not needing a GCC extension to make this work.
*
* Minor modification of:
* http://stackoverflow.com/questions/5355241/generating-function-declaration-using-a-macro-iteration/5355946#5355946
*
* Supports up to five arguments
*/
/* GCC-specific design that doesn't require per-callback defines */
#define PP_HAS_ARGS_IMPL2(_0, _1, _2, _3, _4, _5, N, ...) N
#define PP_HAS_ARGS_SOURCE() \
ONE_OR_MORE, ONE_OR_MORE, ONE_OR_MORE, ONE_OR_MORE, ONE_OR_MORE, ZERO
#define PP_HAS_ARGS_IMPL(...) \
PP_HAS_ARGS_IMPL2(__VA_ARGS__)
#define PP_HAS_ARGS(...) \
PP_HAS_ARGS_IMPL(NOT_EXIST, ##__VA_ARGS__, PP_HAS_ARGS_SOURCE())
#define EXPAND_WCB_ZERO(x) \
(userData)
#define EXPAND_WCB_ONE_OR_MORE(...) \
(__VA_ARGS__, userData)
#define EXPAND_WCB_DISAMBIGUATE2(has_args, ...) \
EXPAND_WCB_ ## has_args (__VA_ARGS__)
#define EXPAND_WCB_DISAMBIGUATE(has_args, ...) \
EXPAND_WCB_DISAMBIGUATE2(has_args, __VA_ARGS__)
#define EXPAND_WCB(...) \
EXPAND_WCB_DISAMBIGUATE(PP_HAS_ARGS(__VA_ARGS__), __VA_ARGS__)
#endif
/*
* Compiler defines:
* FG_COMPILER_SUPPORTS_GCC_VA_ARGS_HACK: if the compiler supports GCC's varadic macro implementation (AKA, ##__VA_ARGS__)
@ -125,7 +81,8 @@
#define EXPAND_WCB_ZERO(args, userData) ( userData )
#define EXPAND_WCB_ONE_OR_MORE(args, userData) ( EXPAND_WCB_UNPARAN args, userData )
#define EXPAND_WCB_DISAMBIGUATE(has_args, args, userData) EXPAND_WCB_ ## has_args ( args, userData )
#define EXPAND_WCB_DISAMBIGUATE2(has_args, args, userData) EXPAND_WCB_ ## has_args ( args, userData )
#define EXPAND_WCB_DISAMBIGUATE(has_args, args, userData) EXPAND_WCB_DISAMBIGUATE2( has_args, args, userData )
#define EXPAND_WCB_UNWRAP_ARGS2(args, userData) EXPAND_WCB_DISAMBIGUATE( PP_HAS_ARGS args, args, userData )
#define EXPAND_WCB_UNWRAP_ARGS(args) EXPAND_WCB_UNWRAP_ARGS2 args