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Edit File : static_assert.h \| Size : 3.21 KB
#ifndef RBIMPL_STATIC_ASSERT_H /--C++--vi:se ft=cpp:/ #define RBIMPL_STATIC_ASSERT_H /** * @file * @author Ruby developers <ruby-core@ruby-lang.org> * @copyright This file is a part of the programming language Ruby. * Permission is hereby granted, to either redistribute and/or * modify this file, provided that the conditions mentioned in the * file COPYING are met. Consult the file for details. * @warning Symbols prefixed with either `RBIMPL` or `rbimpl` are * implementation details. Don't take them as canon. They could * rapidly appear then vanish. The name (path) of this header file * is also an implementation detail. Do not expect it to persist * at the place it is now. Developers are free to move it anywhere * anytime at will. * @note To ruby-core: remember that this header can be possibly * recursively included from extension libraries written in C++. * Do not expect for instance `__VA_ARGS__` is always available. * We assume C99 for ruby itself but we don't assume languages of * extension libraries. They could be written in C++98. * @brief Defines #RBIMPL_STATIC_ASSERT. / #include <assert.h> #include "ruby/internal/has/extension.h" #include "ruby/internal/compiler_since.h" #include "ruby/internal/attr/maybe_unused.h" /* @cond INTERNAL_MACRO / #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 /* @endcond / /* * @brief Wraps (or simulates) `static_assert` * @param name Valid C/C++ identifier, describing the assertion. * @param expr Expression to assert. * @note `name` shall not be a string literal. / #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 */ Back

Edit File : static_assert.h | Size : 3.21 KB

#ifndef RBIMPL_STATIC_ASSERT_H                       /*-*-C++-*-vi:se ft=cpp:*/
#define RBIMPL_STATIC_ASSERT_H
/**
 * @file
 * @author     Ruby developers <ruby-core@ruby-lang.org>
 * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
 *             Permission  is hereby  granted,  to  either redistribute  and/or
 *             modify this file, provided that  the conditions mentioned in the
 *             file COPYING are met.  Consult the file for details.
 * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
 *             implementation details.   Don't take  them as canon.  They could
 *             rapidly appear then vanish.  The name (path) of this header file
 *             is also an  implementation detail.  Do not expect  it to persist
 *             at the place it is now.  Developers are free to move it anywhere
 *             anytime at will.
 * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
 *             recursively included  from extension  libraries written  in C++.
 *             Do not  expect for  instance `__VA_ARGS__` is  always available.
 *             We assume C99  for ruby itself but we don't  assume languages of
 *             extension libraries.  They could be written in C++98.
 * @brief      Defines #RBIMPL_STATIC_ASSERT.
 */
#include <assert.h>
#include "ruby/internal/has/extension.h"
#include "ruby/internal/compiler_since.h"
#include "ruby/internal/attr/maybe_unused.h"

/** @cond INTERNAL_MACRO */
#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
/** @endcond */

/**
 * @brief  Wraps (or simulates) `static_assert`
 * @param  name  Valid C/C++ identifier, describing the assertion.
 * @param  expr  Expression to assert.
 * @note   `name` shall not be a string literal.
 */
#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 */

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