658102a868
Previously, SConstruct tested whether static_assert worked with trivial constant expressions. Extend the test to more complicated expressions like the ones used in the program. Replace the typedef based approach with an inline enum to avoid warnings about unused local typedefs. Allow use with compilers that lack working static_assert or that cannot accept complicated expressions. Add a non-checking definition that uses the input parameter. This prevents warnings when types or constants are used only for the static_assert.
36 lines
1.3 KiB
C++
36 lines
1.3 KiB
C++
/*
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* This file is part of the DXX-Rebirth project <http://www.dxx-rebirth.com/>.
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* It is copyright by its individual contributors, as recorded in the
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* project's Git history. See COPYING.txt at the top level for license
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* terms and a link to the Git history.
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*/
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#pragma once
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#if defined(DXX_HAVE_CXX11_STATIC_ASSERT)
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/* native */
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#define static_assert(C,M) static_assert(C,M)
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#elif defined(DXX_HAVE_BOOST_STATIC_ASSERT)
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#include <boost/static_assert.hpp>
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#define static_assert(C,M) BOOST_STATIC_ASSERT_MSG((C),M)
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#else
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#define DXX_C_STATIC_ASSERT_PASTE2(A,B,C) A##_##B##_##C
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#define DXX_C_STATIC_ASSERT_PASTE(A,B,C) DXX_C_STATIC_ASSERT_PASTE2(A,B,C)
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#ifdef DXX_HAVE_C_TYPEDEF_STATIC_ASSERT
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#define static_assert(C,M) enum { DXX_C_STATIC_ASSERT_PASTE(static_assertion_check, __LINE__, __COUNTER__) = sizeof(char[(C) ? 1 : -1]) }
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#else
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#define static_assert(C,M) enum { DXX_C_STATIC_ASSERT_PASTE(static_assertion_disabled, __LINE__, __COUNTER__) = sizeof((C)) }
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#endif
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#endif
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#define DEFINE_ASSERT_HELPER_CLASS(N,OP,STR) \
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template <typename T, T L, T R> \
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class N \
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{ \
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static_assert(L OP R, STR); \
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public: \
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static const bool value = (L OP R); \
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}
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DEFINE_ASSERT_HELPER_CLASS(assert_equal, ==, "values must be equal");
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#define assert_equal(L,R,S) static_assert((assert_equal<decltype((L) + 0), (L) + 0, (R) + 0>::value), S)
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