182 lines
7.1 KiB
C++
182 lines
7.1 KiB
C++
|
// (C) Copyright John Maddock 2000.
|
||
|
|
// Use, modification and distribution are subject to the
|
||
|
|
// Boost Software License, Version 1.0. (See accompanying file
|
||
|
|
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||
|
|
|
||
|
|
// See http://www.boost.org/libs/static_assert for documentation.
|
||
|
|
|
||
|
|
/*
|
||
|
|
Revision history:
|
||
|
|
02 August 2000
|
||
|
|
Initial version.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef BOOST_STATIC_ASSERT_HPP
|
||
|
|
#define BOOST_STATIC_ASSERT_HPP
|
||
|
|
|
||
|
|
#include <boost/config.hpp>
|
||
|
|
#include <boost/detail/workaround.hpp>
|
||
|
|
#include <cstddef> //for std::size_t
|
||
|
|
|
||
|
|
#if defined(__GNUC__) && !defined(__GXX_EXPERIMENTAL_CXX0X__)
|
||
|
|
//
|
||
|
|
// This is horrible, but it seems to be the only we can shut up the
|
||
|
|
// "anonymous variadic macros were introduced in C99 [-Wvariadic-macros]"
|
||
|
|
// warning that get spewed out otherwise in non-C++11 mode.
|
||
|
|
//
|
||
|
|
#pragma GCC system_header
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifndef BOOST_NO_CXX11_STATIC_ASSERT
|
||
|
|
# ifndef BOOST_NO_CXX11_VARIADIC_MACROS
|
||
|
|
# define BOOST_STATIC_ASSERT_MSG( ... ) static_assert(__VA_ARGS__)
|
||
|
|
# else
|
||
|
|
# define BOOST_STATIC_ASSERT_MSG( B, Msg ) static_assert( B, Msg )
|
||
|
|
# endif
|
||
|
|
#else
|
||
|
|
# define BOOST_STATIC_ASSERT_MSG( B, Msg ) BOOST_STATIC_ASSERT( B )
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef BOOST_BORLANDC
|
||
|
|
//
|
||
|
|
// workaround for buggy integral-constant expression support:
|
||
|
|
#define BOOST_BUGGY_INTEGRAL_CONSTANT_EXPRESSIONS
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if defined(__GNUC__) && (__GNUC__ == 3) && ((__GNUC_MINOR__ == 3) || (__GNUC_MINOR__ == 4))
|
||
|
|
// gcc 3.3 and 3.4 don't produce good error messages with the default version:
|
||
|
|
# define BOOST_SA_GCC_WORKAROUND
|
||
|
|
#endif
|
||
|
|
|
||
|
|
//
|
||
|
|
// If the compiler issues warnings about old C style casts,
|
||
|
|
// then enable this:
|
||
|
|
//
|
||
|
|
#if defined(__GNUC__) && ((__GNUC__ > 3) || ((__GNUC__ == 3) && (__GNUC_MINOR__ >= 4)))
|
||
|
|
# ifndef BOOST_NO_CXX11_VARIADIC_MACROS
|
||
|
|
# define BOOST_STATIC_ASSERT_BOOL_CAST( ... ) ((__VA_ARGS__) != 0)
|
||
|
|
# else
|
||
|
|
# define BOOST_STATIC_ASSERT_BOOL_CAST( x ) ((x) != 0)
|
||
|
|
# endif
|
||
|
|
#else
|
||
|
|
# ifndef BOOST_NO_CXX11_VARIADIC_MACROS
|
||
|
|
# define BOOST_STATIC_ASSERT_BOOL_CAST( ... ) (bool)(__VA_ARGS__)
|
||
|
|
# else
|
||
|
|
# define BOOST_STATIC_ASSERT_BOOL_CAST(x) (bool)(x)
|
||
|
|
# endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifndef BOOST_NO_CXX11_STATIC_ASSERT
|
||
|
|
# ifndef BOOST_NO_CXX11_VARIADIC_MACROS
|
||
|
|
# define BOOST_STATIC_ASSERT( ... ) static_assert(__VA_ARGS__, #__VA_ARGS__)
|
||
|
|
# else
|
||
|
|
# define BOOST_STATIC_ASSERT( B ) static_assert(B, #B)
|
||
|
|
# endif
|
||
|
|
#else
|
||
|
|
|
||
|
|
namespace boost{
|
||
|
|
|
||
|
|
// HP aCC cannot deal with missing names for template value parameters
|
||
|
|
template <bool x> struct STATIC_ASSERTION_FAILURE;
|
||
|
|
|
||
|
|
template <> struct STATIC_ASSERTION_FAILURE<true> { enum { value = 1 }; };
|
||
|
|
|
||
|
|
// HP aCC cannot deal with missing names for template value parameters
|
||
|
|
template<std::size_t x> struct static_assert_test{};
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Implicit instantiation requires that all member declarations be
|
||
|
|
// instantiated, but that the definitions are *not* instantiated.
|
||
|
|
//
|
||
|
|
// It's not particularly clear how this applies to enum's or typedefs;
|
||
|
|
// both are described as declarations [7.1.3] and [7.2] in the standard,
|
||
|
|
// however some compilers use "delayed evaluation" of one or more of
|
||
|
|
// these when implicitly instantiating templates. We use typedef declarations
|
||
|
|
// by default, but try defining BOOST_USE_ENUM_STATIC_ASSERT if the enum
|
||
|
|
// version gets better results from your compiler...
|
||
|
|
//
|
||
|
|
// Implementation:
|
||
|
|
// Both of these versions rely on sizeof(incomplete_type) generating an error
|
||
|
|
// message containing the name of the incomplete type. We use
|
||
|
|
// "STATIC_ASSERTION_FAILURE" as the type name here to generate
|
||
|
|
// an eye catching error message. The result of the sizeof expression is either
|
||
|
|
// used as an enum initialiser, or as a template argument depending which version
|
||
|
|
// is in use...
|
||
|
|
// Note that the argument to the assert is explicitly cast to bool using old-
|
||
|
|
// style casts: too many compilers currently have problems with static_cast
|
||
|
|
// when used inside integral constant expressions.
|
||
|
|
//
|
||
|
|
#if !defined(BOOST_BUGGY_INTEGRAL_CONSTANT_EXPRESSIONS)
|
||
|
|
|
||
|
|
#if defined(BOOST_MSVC) && defined(BOOST_NO_CXX11_VARIADIC_MACROS)
|
||
|
|
#define BOOST_STATIC_ASSERT( B ) \
|
||
|
|
typedef ::boost::static_assert_test<\
|
||
|
|
sizeof(::boost::STATIC_ASSERTION_FAILURE< BOOST_STATIC_ASSERT_BOOL_CAST ( B ) >)>\
|
||
|
|
BOOST_JOIN(boost_static_assert_typedef_, __COUNTER__)
|
||
|
|
#elif defined(BOOST_MSVC)
|
||
|
|
#define BOOST_STATIC_ASSERT(...) \
|
||
|
|
typedef ::boost::static_assert_test<\
|
||
|
|
sizeof(::boost::STATIC_ASSERTION_FAILURE< BOOST_STATIC_ASSERT_BOOL_CAST (__VA_ARGS__) >)>\
|
||
|
|
BOOST_JOIN(boost_static_assert_typedef_, __COUNTER__)
|
||
|
|
#elif (defined(BOOST_INTEL_CXX_VERSION) || defined(BOOST_SA_GCC_WORKAROUND)) && defined(BOOST_NO_CXX11_VARIADIC_MACROS)
|
||
|
|
// agurt 15/sep/02: a special care is needed to force Intel C++ issue an error
|
||
|
|
// instead of warning in case of failure
|
||
|
|
# define BOOST_STATIC_ASSERT( B ) \
|
||
|
|
typedef char BOOST_JOIN(boost_static_assert_typedef_, __LINE__) \
|
||
|
|
[ ::boost::STATIC_ASSERTION_FAILURE< BOOST_STATIC_ASSERT_BOOL_CAST( B ) >::value ]
|
||
|
|
#elif (defined(BOOST_INTEL_CXX_VERSION) || defined(BOOST_SA_GCC_WORKAROUND)) && !defined(BOOST_NO_CXX11_VARIADIC_MACROS)
|
||
|
|
// agurt 15/sep/02: a special care is needed to force Intel C++ issue an error
|
||
|
|
// instead of warning in case of failure
|
||
|
|
# define BOOST_STATIC_ASSERT(...) \
|
||
|
|
typedef char BOOST_JOIN(boost_static_assert_typedef_, __LINE__) \
|
||
|
|
[ ::boost::STATIC_ASSERTION_FAILURE< BOOST_STATIC_ASSERT_BOOL_CAST( __VA_ARGS__ ) >::value ]
|
||
|
|
#elif defined(__sgi)
|
||
|
|
// special version for SGI MIPSpro compiler
|
||
|
|
#define BOOST_STATIC_ASSERT( B ) \
|
||
|
|
BOOST_STATIC_CONSTANT(bool, \
|
||
|
|
BOOST_JOIN(boost_static_assert_test_, __LINE__) = ( B )); \
|
||
|
|
typedef ::boost::static_assert_test<\
|
||
|
|
sizeof(::boost::STATIC_ASSERTION_FAILURE< \
|
||
|
|
BOOST_JOIN(boost_static_assert_test_, __LINE__) >)>\
|
||
|
|
BOOST_JOIN(boost_static_assert_typedef_, __LINE__)
|
||
|
|
#elif BOOST_WORKAROUND(__MWERKS__, <= 0x3003)
|
||
|
|
// special version for CodeWarrior <= 8.x
|
||
|
|
#define BOOST_STATIC_ASSERT( B ) \
|
||
|
|
BOOST_STATIC_CONSTANT(int, \
|
||
|
|
BOOST_JOIN(boost_static_assert_test_, __LINE__) = \
|
||
|
|
sizeof(::boost::STATIC_ASSERTION_FAILURE< BOOST_STATIC_ASSERT_BOOL_CAST( B ) >) )
|
||
|
|
#else
|
||
|
|
// generic version
|
||
|
|
# ifndef BOOST_NO_CXX11_VARIADIC_MACROS
|
||
|
|
# define BOOST_STATIC_ASSERT( ... ) \
|
||
|
|
typedef ::boost::static_assert_test<\
|
||
|
|
sizeof(::boost::STATIC_ASSERTION_FAILURE< BOOST_STATIC_ASSERT_BOOL_CAST( __VA_ARGS__ ) >)>\
|
||
|
|
BOOST_JOIN(boost_static_assert_typedef_, __LINE__) BOOST_ATTRIBUTE_UNUSED
|
||
|
|
# else
|
||
|
|
# define BOOST_STATIC_ASSERT( B ) \
|
||
|
|
typedef ::boost::static_assert_test<\
|
||
|
|
sizeof(::boost::STATIC_ASSERTION_FAILURE< BOOST_STATIC_ASSERT_BOOL_CAST( B ) >)>\
|
||
|
|
BOOST_JOIN(boost_static_assert_typedef_, __LINE__) BOOST_ATTRIBUTE_UNUSED
|
||
|
|
# endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#else
|
||
|
|
// alternative enum based implementation:
|
||
|
|
# ifndef BOOST_NO_CXX11_VARIADIC_MACROS
|
||
|
|
# define BOOST_STATIC_ASSERT( ... ) \
|
||
|
|
enum { BOOST_JOIN(boost_static_assert_enum_, __LINE__) \
|
||
|
|
= sizeof(::boost::STATIC_ASSERTION_FAILURE< (bool)( __VA_ARGS__ ) >) }
|
||
|
|
# else
|
||
|
|
# define BOOST_STATIC_ASSERT(B) \
|
||
|
|
enum { BOOST_JOIN(boost_static_assert_enum_, __LINE__) \
|
||
|
|
= sizeof(::boost::STATIC_ASSERTION_FAILURE< (bool)( B ) >) }
|
||
|
|
# endif
|
||
|
|
#endif
|
||
|
|
#endif // defined(BOOST_NO_CXX11_STATIC_ASSERT)
|
||
|
|
|
||
|
|
#endif // BOOST_STATIC_ASSERT_HPP
|
||
|
|
|
||
|
|
|