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authorRemko Tronçon <git@el-tramo.be>2010-03-28 15:46:49 (GMT)
committerRemko Tronçon <git@el-tramo.be>2010-03-28 15:46:49 (GMT)
commitf53a1ef582494458301b97bf6e546be52d7ff7e8 (patch)
tree7571b5cbcbd8a8f1dd1c966c9045b6cb69f0e295 /3rdParty/Boost/src/boost/static_assert.hpp
parent638345680d72ca6acaf123f2c8c1c391f696e371 (diff)
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+// (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>
+
+#ifdef __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)))
+# define BOOST_STATIC_ASSERT_BOOL_CAST( x ) ((x) == 0 ? false : true)
+#else
+# define BOOST_STATIC_ASSERT_BOOL_CAST(x) (bool)(x)
+#endif
+
+#ifdef BOOST_HAS_STATIC_ASSERT
+# define BOOST_STATIC_ASSERT( B ) static_assert(B, #B)
+#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<int 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) && (BOOST_MSVC < 1300)
+// __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 ) >)\
+ > boost_static_assert_typedef_
+#elif defined(BOOST_MSVC)
+#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_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< BOOST_STATIC_ASSERT_BOOL_CAST( 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< BOOST_STATIC_ASSERT_BOOL_CAST( B ) >) )
+#else
+// generic version
+#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__)
+#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 ) >) }
+#endif
+#endif // ndef BOOST_HAS_STATIC_ASSERT
+
+#endif // BOOST_STATIC_ASSERT_HPP
+
+