mirror of http://192.168.1.51:8099/lmh188/twain3.0
142 lines
4.2 KiB
C++
142 lines
4.2 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_IS_IDENTIFIER_HPP)
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#define BOOST_VMD_IS_IDENTIFIER_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/is_identifier.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_IS_IDENTIFIER(...)
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\brief Tests whether a parameter is an identifier.
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... = variadic parameters
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The first variadic parameter is required and it is the input to test.
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Further variadic parameters are optional and are identifiers to match.
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The data may take one of two forms; it is either one or more single identifiers
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or a single Boost PP tuple of identifiers.
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@code
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returns = 1 if the parameter is an identifier, otherwise 0.
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If the parameter is not an identifier,
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or if optional identifiers are specified and the identifier
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does not match any of the optional identifiers, the macro returns 0.
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@endcode
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Identifiers are registered in VMD with:
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@code
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#define BOOST_VMD_REG_XXX (XXX) where XXX is a v-identifier.
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@endcode
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The identifier must be registered to be found.
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Identifiers are pre-detected in VMD with:
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@code
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#define BOOST_VMD_DETECT_XXX_XXX where XXX is an identifier.
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@endcode
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If you specify optional identifiers and have not specified the detection
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of an optional identifier, that optional identifier will never match the input.
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If the input is not a VMD data type this macro could lead to
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a preprocessor error. This is because the macro
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uses preprocessor concatenation to determine if the input
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is an identifier once it is determined that the input does not
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start with parenthesis. If the data being concatenated would
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lead to an invalid preprocessor token the compiler can issue
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a preprocessor error.
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*/
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#define BOOST_VMD_IS_IDENTIFIER(...) \
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BOOST_VMD_DETAIL_IS_IDENTIFIER(__VA_ARGS__) \
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/**/
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/** \def BOOST_VMD_IS_IDENTIFIER_D(d,...)
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\brief Tests whether a parameter is an identifier. Re-entrant version.
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d = The next available BOOST_PP_WHILE iteration. <br/>
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... = variadic parameters
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The first variadic parameter is required and it is the input to test.
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Further variadic parameters are optional and are identifiers to match.
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The data may take one of two forms; it is either one or more single identifiers
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or a single Boost PP tuple of identifiers.
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@code
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returns = 1 if the parameter is an identifier, otherwise 0.
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If the parameter is not an identifier,
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or if optional identifiers are specified and the identifier
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does not match any of the optional identifiers, the macro returns 0.
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@endcode
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Identifiers are registered in VMD with:
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@code
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#define BOOST_VMD_REG_XXX (XXX) where XXX is a v-identifier.
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@endcode
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The identifier must be registered to be found.
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Identifiers are pre-detected in VMD with:
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@code
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#define BOOST_VMD_DETECT_XXX_XXX where XXX is an identifier.
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@endcode
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If you specify optional identifiers and have not specified the detection
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of an optional identifier, that optional identifier will never match the input.
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If the input is not a VMD data type this macro could lead to
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a preprocessor error. This is because the macro
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uses preprocessor concatenation to determine if the input
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is an identifier once it is determined that the input does not
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start with parenthesis. If the data being concatenated would
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lead to an invalid preprocessor token the compiler can issue
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a preprocessor error.
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*/
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#define BOOST_VMD_IS_IDENTIFIER_D(d,...) \
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BOOST_VMD_DETAIL_IS_IDENTIFIER_D(d,__VA_ARGS__) \
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/**/
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#endif /* BOOST_PP_VARIADICS */
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#endif /* BOOST_VMD_IS_IDENTIFIER_HPP */
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