static_assert.h

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#ifndef RBIMPL_STATIC_ASSERT_H                       /*-*-C++-*-vi:se ft=cpp:*/
#define RBIMPL_STATIC_ASSERT_H
#include <assert.h>
#include "ruby/internal/has/extension.h"
#include "ruby/internal/compiler_since.h"
#include "ruby/internal/attr/maybe_unused.h"
 
#if defined(__cplusplus) && defined(__cpp_static_assert)
# /* https://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations */
# define RBIMPL_STATIC_ASSERT0 static_assert
 
#elif defined(__cplusplus) && RBIMPL_COMPILER_SINCE(MSVC, 16, 0, 0)
# define RBIMPL_STATIC_ASSERT0 static_assert
 
#elif defined(__INTEL_CXX11_MODE__)
# define RBIMPL_STATIC_ASSERT0 static_assert
 
#elif defined(__cplusplus) && __cplusplus >= 201103L
# define RBIMPL_STATIC_ASSERT0 static_assert
 
#elif defined(__cplusplus) && RBIMPL_HAS_EXTENSION(cxx_static_assert)
# define RBIMPL_STATIC_ASSERT0 __extension__ static_assert
 
#elif defined(__GXX_EXPERIMENTAL_CXX0X__) && __GXX_EXPERIMENTAL_CXX0X__
# define RBIMPL_STATIC_ASSERT0 __extension__ static_assert
 
#elif defined(__STDC_VERSION__) && RBIMPL_HAS_EXTENSION(c_static_assert)
# define RBIMPL_STATIC_ASSERT0 __extension__ _Static_assert
 
#elif defined(__STDC_VERSION__) && RBIMPL_COMPILER_SINCE(GCC, 4, 6, 0)
# define RBIMPL_STATIC_ASSERT0 __extension__ _Static_assert
 
#elif defined(static_assert)
# /* Take <assert.h> definition */
# define RBIMPL_STATIC_ASSERT0 static_assert
#endif
#if defined(__DOXYGEN__)
# define RBIMPL_STATIC_ASSERT static_assert
 
#elif defined(RBIMPL_STATIC_ASSERT0)
# define RBIMPL_STATIC_ASSERT(name, expr) \
    RBIMPL_STATIC_ASSERT0(expr, # name ": " # expr)
 
#else
# define RBIMPL_STATIC_ASSERT(name, expr) \
    RBIMPL_ATTR_MAYBE_UNUSED() typedef int static_assert_ ## name ## _check[1 - 2 * !(expr)]
#endif
 
#endif /* RBIMPL_STATIC_ASSERT_H */