forked from KolibriOS/kolibrios
82 lines
3.5 KiB
C++
82 lines
3.5 KiB
C++
// Concept-checking control -*- C++ -*-
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// Copyright (C) 2001 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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// USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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#ifndef _GLIBCPP_CONCEPT_CHECK
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#define _GLIBCPP_CONCEPT_CHECK 1
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#pragma GCC system_header
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#include <bits/c++config.h>
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// All places in libstdc++-v3 where these are used, or /might/ be used, or
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// don't need to be used, or perhaps /should/ be used, are commented with
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// "concept requirements" (and maybe some more text). So grep like crazy
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// if you're looking for additional places to use these.
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// Concept-checking code is off by default unless users turn it on via
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// configure options or editing c++config.h.
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#ifndef _GLIBCPP_CONCEPT_CHECKS
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#define __glibcpp_function_requires(...)
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#define __glibcpp_class_requires(_a,_b)
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#define __glibcpp_class_requires2(_a,_b,_c)
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#define __glibcpp_class_requires3(_a,_b,_c,_d)
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#define __glibcpp_class_requires4(_a,_b,_c,_d,_e)
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#else // the checks are on
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#include <bits/boost_concept_check.h>
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// Note that the obvious and elegant approach of
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//
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//#define glibcpp_function_requires(C) \
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// boost::function_requires< boost::C >()
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//
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// won't work due to concept templates with more than one parameter, e.g.,
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// BinaryPredicateConcept. The preprocessor tries to split things up on
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// the commas in the template argument list. We can't use an inner pair of
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// parenthesis to hide the commas, because "boost::(Temp<Foo,Bar>)" isn't
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// a valid instantiation pattern. Thus, we steal a feature from C99.
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#define __glibcpp_function_requires(...) \
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__gnu_cxx::__function_requires< __gnu_cxx::__VA_ARGS__ >()
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#define __glibcpp_class_requires(_a,_C) \
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_GLIBCPP_CLASS_REQUIRES(_a, __gnu_cxx, _C)
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#define __glibcpp_class_requires2(_a,_b,_C) \
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_GLIBCPP_CLASS_REQUIRES2(_a, _b, __gnu_cxx, _C)
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#define __glibcpp_class_requires3(_a,_b,_c,_C) \
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_GLIBCPP_CLASS_REQUIRES3(_a, _b, _c, __gnu_cxx, _C)
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#define __glibcpp_class_requires4(_a,_b,_c,_d,_C) \
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_GLIBCPP_CLASS_REQUIRES4(_a, _b, _c, _d, __gnu_cxx, _C)
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#endif // enable/disable
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#endif // _GLIBCPP_CONCEPT_CHECK
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