| // Concept-checking control -*- C++ -*- |
| |
| // Copyright (C) 2001, 2009, 2010 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // Under Section 7 of GPL version 3, you are granted additional |
| // permissions described in the GCC Runtime Library Exception, version |
| // 3.1, as published by the Free Software Foundation. |
| |
| // You should have received a copy of the GNU General Public License and |
| // a copy of the GCC Runtime Library Exception along with this program; |
| // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| // <http://www.gnu.org/licenses/>. |
| |
| /** @file bits/concept_check.h |
| * This is an internal header file, included by other library headers. |
| * Do not attempt to use it directly. @headername{iterator} |
| */ |
| |
| #ifndef _CONCEPT_CHECK_H |
| #define _CONCEPT_CHECK_H 1 |
| |
| #pragma GCC system_header |
| |
| #include <bits/c++config.h> |
| |
| // All places in libstdc++-v3 where these are used, or /might/ be used, or |
| // don't need to be used, or perhaps /should/ be used, are commented with |
| // "concept requirements" (and maybe some more text). So grep like crazy |
| // if you're looking for additional places to use these. |
| |
| // Concept-checking code is off by default unless users turn it on via |
| // configure options or editing c++config.h. |
| |
| #ifndef _GLIBCXX_CONCEPT_CHECKS |
| |
| #define __glibcxx_function_requires(...) |
| #define __glibcxx_class_requires(_a,_b) |
| #define __glibcxx_class_requires2(_a,_b,_c) |
| #define __glibcxx_class_requires3(_a,_b,_c,_d) |
| #define __glibcxx_class_requires4(_a,_b,_c,_d,_e) |
| |
| #else // the checks are on |
| |
| #include <bits/boost_concept_check.h> |
| |
| // Note that the obvious and elegant approach of |
| // |
| //#define glibcxx_function_requires(C) boost::function_requires< boost::C >() |
| // |
| // won't work due to concept templates with more than one parameter, e.g., |
| // BinaryPredicateConcept. The preprocessor tries to split things up on |
| // the commas in the template argument list. We can't use an inner pair of |
| // parenthesis to hide the commas, because "boost::(Temp<Foo,Bar>)" isn't |
| // a valid instantiation pattern. Thus, we steal a feature from C99. |
| |
| #define __glibcxx_function_requires(...) \ |
| __gnu_cxx::__function_requires< __gnu_cxx::__VA_ARGS__ >(); |
| #define __glibcxx_class_requires(_a,_C) \ |
| _GLIBCXX_CLASS_REQUIRES(_a, __gnu_cxx, _C); |
| #define __glibcxx_class_requires2(_a,_b,_C) \ |
| _GLIBCXX_CLASS_REQUIRES2(_a, _b, __gnu_cxx, _C); |
| #define __glibcxx_class_requires3(_a,_b,_c,_C) \ |
| _GLIBCXX_CLASS_REQUIRES3(_a, _b, _c, __gnu_cxx, _C); |
| #define __glibcxx_class_requires4(_a,_b,_c,_d,_C) \ |
| _GLIBCXX_CLASS_REQUIRES4(_a, _b, _c, _d, __gnu_cxx, _C); |
| |
| #endif // enable/disable |
| |
| #endif // _GLIBCXX_CONCEPT_CHECK |
