libstdc++
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00001 // Concept-checking control -*- C++ -*- 00002 00003 // Copyright (C) 2001, 2009, 2010 Free Software Foundation, Inc. 00004 // 00005 // This file is part of the GNU ISO C++ Library. This library is free 00006 // software; you can redistribute it and/or modify it under the 00007 // terms of the GNU General Public License as published by the 00008 // Free Software Foundation; either version 3, or (at your option) 00009 // any later version. 00010 00011 // This library is distributed in the hope that it will be useful, 00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 // GNU General Public License for more details. 00015 00016 // Under Section 7 of GPL version 3, you are granted additional 00017 // permissions described in the GCC Runtime Library Exception, version 00018 // 3.1, as published by the Free Software Foundation. 00019 00020 // You should have received a copy of the GNU General Public License and 00021 // a copy of the GCC Runtime Library Exception along with this program; 00022 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 00023 // <http://www.gnu.org/licenses/>. 00024 00025 /** @file bits/concept_check.h 00026 * This is an internal header file, included by other library headers. 00027 * Do not attempt to use it directly. @headername{iterator} 00028 */ 00029 00030 #ifndef _CONCEPT_CHECK_H 00031 #define _CONCEPT_CHECK_H 1 00032 00033 #pragma GCC system_header 00034 00035 #include <bits/c++config.h> 00036 00037 // All places in libstdc++-v3 where these are used, or /might/ be used, or 00038 // don't need to be used, or perhaps /should/ be used, are commented with 00039 // "concept requirements" (and maybe some more text). So grep like crazy 00040 // if you're looking for additional places to use these. 00041 00042 // Concept-checking code is off by default unless users turn it on via 00043 // configure options or editing c++config.h. 00044 00045 #ifndef _GLIBCXX_CONCEPT_CHECKS 00046 00047 #define __glibcxx_function_requires(...) 00048 #define __glibcxx_class_requires(_a,_b) 00049 #define __glibcxx_class_requires2(_a,_b,_c) 00050 #define __glibcxx_class_requires3(_a,_b,_c,_d) 00051 #define __glibcxx_class_requires4(_a,_b,_c,_d,_e) 00052 00053 #else // the checks are on 00054 00055 #include <bits/boost_concept_check.h> 00056 00057 // Note that the obvious and elegant approach of 00058 // 00059 //#define glibcxx_function_requires(C) boost::function_requires< boost::C >() 00060 // 00061 // won't work due to concept templates with more than one parameter, e.g., 00062 // BinaryPredicateConcept. The preprocessor tries to split things up on 00063 // the commas in the template argument list. We can't use an inner pair of 00064 // parenthesis to hide the commas, because "boost::(Temp<Foo,Bar>)" isn't 00065 // a valid instantiation pattern. Thus, we steal a feature from C99. 00066 00067 #define __glibcxx_function_requires(...) \ 00068 __gnu_cxx::__function_requires< __gnu_cxx::__VA_ARGS__ >(); 00069 #define __glibcxx_class_requires(_a,_C) \ 00070 _GLIBCXX_CLASS_REQUIRES(_a, __gnu_cxx, _C); 00071 #define __glibcxx_class_requires2(_a,_b,_C) \ 00072 _GLIBCXX_CLASS_REQUIRES2(_a, _b, __gnu_cxx, _C); 00073 #define __glibcxx_class_requires3(_a,_b,_c,_C) \ 00074 _GLIBCXX_CLASS_REQUIRES3(_a, _b, _c, __gnu_cxx, _C); 00075 #define __glibcxx_class_requires4(_a,_b,_c,_d,_C) \ 00076 _GLIBCXX_CLASS_REQUIRES4(_a, _b, _c, _d, __gnu_cxx, _C); 00077 00078 #endif // enable/disable 00079 00080 #endif // _GLIBCXX_CONCEPT_CHECK