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compat.h: Add some infrastructure for C++ template metaprogramming.

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git-svn-id: https://svn.eduke32.com/eduke32@6117 1a8010ca-5511-0410-912e-c29ae57300e0
This commit is contained in:
hendricks266 2017-04-12 08:30:29 +00:00
parent a1f317ecfc
commit 7a40df33b6
1 changed files with 43 additions and 0 deletions
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43
source/build/include/compat.h
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@ -197,6 +197,12 @@
# define CONSTEXPR
#endif
#if CXXSTD >= 2011
# define FINAL final
#else
# define FINAL
#endif
#if CXXSTD >= 2014
# define CONSTEXPR_CXX14 CONSTEXPR
#else
@ -345,6 +351,11 @@ defined __x86_64__ || defined __amd64__ || defined _M_X64 || defined _M_IA64 ||
#include <assert.h>
#ifdef __cplusplus
# if CXXSTD >= 2011
# include <type_traits>
# endif
#endif
////////// Platform headers //////////
@ -621,8 +632,40 @@ void eduke32_exit_return(int) ATTRIBUTE((noreturn));
#endif
////////// Metaprogramming structs //////////
#ifdef __cplusplus
# if CXXSTD >= 2011
using std::is_integral;
# endif
# if CXXSTD >= 2014
using std::enable_if_t;
using std::conditional_t;
# elif CXXSTD >= 2011
template <bool B, class T = void>
using enable_if_t = typename std::enable_if<B, T>::type;
template<bool B, class T, class F>
using conditional_t = typename std::conditional<B, T, F>::type;
# endif
#endif
////////// Typedefs //////////
#ifdef __cplusplus
// for use in SFINAE constructs in place of the pointer trick (to which 0 can unintentionally be implicitly cast)
struct Dummy FINAL
{
FORCE_INLINE CONSTEXPR Dummy() : dummy(0) { }
private:
char dummy;
};
#endif
typedef struct {
int32_t x, y;
} vec2_t;