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59 lines
2.0 KiB
C++
59 lines
2.0 KiB
C++
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// (C) Copyright Edward Diener 2011-2015
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// Use, modification and distribution are subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt).
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#if !defined(BOOST_VMD_ASSERT_HPP)
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#define BOOST_VMD_ASSERT_HPP
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#include <boost/vmd/detail/setup.hpp>
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#if BOOST_PP_VARIADICS
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#include <boost/vmd/detail/assert.hpp>
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/*
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The succeeding comments in this file are in doxygen format.
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*/
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/** \file
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*/
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/** \def BOOST_VMD_ASSERT(...)
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\brief Conditionally causes an error to be generated.
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... = variadic parameters, maximum of 2 will be considered.
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Any variadic parameters beyond the maximum of 2 are just ignored.
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The first variadic parameter is:
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cond = A condition that determines whether an assertion occurs. Valid values range from 0 to BOOST_PP_LIMIT_MAG.
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The second variadic parameter (optional) is:
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errstr = An error string for generating a compiler error when using the VC++ compiler.
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The VC++ compiler is incapable of producing a preprocessor error so when the 'cond'
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is 0, a compiler error is generated by outputting C++ code in the form of:
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typedef char errstr[-1];
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The errstr defaults to BOOST_VMD_ASSERT_ERROR if not supplied.
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It is only relevant for VC++.
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returns = If cond expands to 0, this macro causes an error. Otherwise, it expands to nothing.
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For all compilers other than Visual C++ the error is a preprocessing error.
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For Visual C++ the error is caused by output invalid C++: this error could be
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masked if the invalid output is ignored by a macro which invokes this macro.
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*/
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# define BOOST_VMD_ASSERT(...) \
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BOOST_VMD_DETAIL_ASSERT(__VA_ARGS__) \
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/**/
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#endif /* BOOST_PP_VARIADICS */
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#endif /* BOOST_VMD_ASSERT_HPP */
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