mirror of
https://github.com/boostorg/static_assert.git
synced 2025-07-14 05:06:33 +02:00
Compare commits
2 Commits
svn-branch
...
svn-branch
Author | SHA1 | Date | |
---|---|---|---|
149538e2f7 | |||
4bab0aef74 |
@ -1,21 +1,21 @@
|
||||
// (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)
|
||||
// Permission to copy, use, modify, sell and
|
||||
// distribute this software is granted provided this copyright notice appears
|
||||
// in all copies. This software is provided "as is" without express or implied
|
||||
// warranty, and with no claim as to its suitability for any purpose.
|
||||
|
||||
// See http://www.boost.org/libs/static_assert for documentation.
|
||||
// See http://www.boost.org for most recent version including documentation.
|
||||
|
||||
/*
|
||||
Revision history:
|
||||
02 August 2000
|
||||
Initial version.
|
||||
02 August 2000
|
||||
Initial version.
|
||||
*/
|
||||
|
||||
#ifndef BOOST_STATIC_ASSERT_HPP
|
||||
#define BOOST_STATIC_ASSERT_HPP
|
||||
|
||||
#include <boost/config.hpp>
|
||||
#include <boost/detail/workaround.hpp>
|
||||
|
||||
#ifdef __BORLANDC__
|
||||
//
|
||||
@ -23,20 +23,13 @@
|
||||
#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
|
||||
|
||||
namespace boost{
|
||||
|
||||
// HP aCC cannot deal with missing names for template value parameters
|
||||
template <bool x> struct STATIC_ASSERTION_FAILURE;
|
||||
template <bool> struct STATIC_ASSERTION_FAILURE;
|
||||
|
||||
template <> struct STATIC_ASSERTION_FAILURE<true> { enum { value = 1 }; };
|
||||
template <> struct STATIC_ASSERTION_FAILURE<true>{};
|
||||
|
||||
// HP aCC cannot deal with missing names for template value parameters
|
||||
template<int x> struct static_assert_test{};
|
||||
template<int> struct static_assert_test{};
|
||||
|
||||
}
|
||||
|
||||
@ -58,61 +51,39 @@ template<int x> struct static_assert_test{};
|
||||
// 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) && (BOOST_MSVC < 1300)
|
||||
#if !defined(BOOST_BUGGY_INTEGRAL_CONSTANT_EXPRESSIONS) && !defined(__MWERKS__)
|
||||
#ifndef BOOST_MSVC
|
||||
#define BOOST_STATIC_ASSERT( B ) \
|
||||
typedef ::boost::static_assert_test<\
|
||||
sizeof(::boost::STATIC_ASSERTION_FAILURE< ( B ) >)>\
|
||||
BOOST_ASSERT_JOIN(boost_static_assert_typedef_, __LINE__)
|
||||
#else
|
||||
// __LINE__ macro broken when -ZI is used see Q199057
|
||||
// fortunately MSVC ignores duplicate typedef's.
|
||||
#define BOOST_STATIC_ASSERT( B ) \
|
||||
typedef ::boost::static_assert_test<\
|
||||
sizeof(::boost::STATIC_ASSERTION_FAILURE< (bool)( B ) >)\
|
||||
sizeof(::boost::STATIC_ASSERTION_FAILURE< ( B ) >)\
|
||||
> boost_static_assert_typedef_
|
||||
#elif defined(BOOST_MSVC)
|
||||
#define BOOST_STATIC_ASSERT( B ) \
|
||||
typedef ::boost::static_assert_test<\
|
||||
sizeof(::boost::STATIC_ASSERTION_FAILURE< (bool)( B ) >)>\
|
||||
BOOST_JOIN(boost_static_assert_typedef_, __COUNTER__)
|
||||
#elif defined(BOOST_INTEL_CXX_VERSION) || defined(BOOST_SA_GCC_WORKAROUND)
|
||||
// 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< (bool)( B ) >::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< (bool)( B ) >) )
|
||||
#else
|
||||
// generic version
|
||||
#define BOOST_STATIC_ASSERT( B ) \
|
||||
typedef ::boost::static_assert_test<\
|
||||
sizeof(::boost::STATIC_ASSERTION_FAILURE< (bool)( B ) >)>\
|
||||
BOOST_JOIN(boost_static_assert_typedef_, __LINE__)
|
||||
#endif
|
||||
|
||||
#else
|
||||
// alternative enum based implementation:
|
||||
#define BOOST_STATIC_ASSERT( B ) \
|
||||
enum { BOOST_JOIN(boost_static_assert_enum_, __LINE__) \
|
||||
= sizeof(::boost::STATIC_ASSERTION_FAILURE< (bool)( B ) >) }
|
||||
enum { BOOST_ASSERT_JOIN(boost_static_assert_enum_, __LINE__) \
|
||||
= sizeof(::boost::STATIC_ASSERTION_FAILURE< ( B ) >) }
|
||||
#endif
|
||||
|
||||
//
|
||||
// The following piece of macro magic joins the two
|
||||
// arguments together, even when one of the arguments is
|
||||
// itself a macro (see 16.3.1 in C++ standard). The key
|
||||
// is that macro expantion of macro arguments does not
|
||||
// occur in BOOST_DO_ASSERT_JOIN but does in BOOST_ASSERT_JOIN
|
||||
// provided it is called from within another macro.
|
||||
#define BOOST_ASSERT_JOIN( X, Y ) BOOST_DO_ASSERT_JOIN( X, Y )
|
||||
#define BOOST_DO_ASSERT_JOIN( X, Y ) X##Y
|
||||
|
||||
#endif // BOOST_STATIC_ASSERT_HPP
|
||||
|
||||
|
||||
|
||||
|
38
static_assert_test_fail_8.cpp
Normal file
38
static_assert_test_fail_8.cpp
Normal file
@ -0,0 +1,38 @@
|
||||
// (C) Copyright John Maddock 2000.
|
||||
// Permission to copy, use, modify, sell and
|
||||
// distribute this software is granted provided this copyright notice appears
|
||||
// in all copies. This software is provided "as is" without express or implied
|
||||
// warranty, and with no claim as to its suitability for any purpose.
|
||||
|
||||
// See http://www.boost.org for most recent version including documentation.
|
||||
|
||||
#include <iterator>
|
||||
#include <list>
|
||||
#include <deque>
|
||||
#include <boost/static_assert.hpp>
|
||||
#include <boost/type_traits.hpp>
|
||||
|
||||
template <class RandonAccessIterator >
|
||||
RandonAccessIterator foo(RandonAccessIterator from, RandonAccessIterator to)
|
||||
{
|
||||
// this template can only be used with
|
||||
// random access iterators...
|
||||
typedef typename std::iterator_traits< RandonAccessIterator >::iterator_category cat;
|
||||
BOOST_STATIC_ASSERT((boost::is_convertible<cat*, std::random_access_iterator_tag*>::value));
|
||||
//
|
||||
// detail goes here...
|
||||
return from;
|
||||
}
|
||||
|
||||
int main()
|
||||
{
|
||||
std::deque<int> d;
|
||||
std::list<int> l;
|
||||
foo(d.begin(), d.end()); // OK
|
||||
foo(l.begin(), l.end()); // error
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
Reference in New Issue
Block a user