| // Concept-checking control -*- C++ -*- |
| |
| // Copyright (C) 2001 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 2, 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. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING. If not, write to the Free |
| // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
| // USA. |
| |
| // As a special exception, you may use this file as part of a free software |
| // library without restriction. Specifically, if other files instantiate |
| // templates or use macros or inline functions from this file, or you compile |
| // this file and link it with other files to produce an executable, this |
| // file does not by itself cause the resulting executable to be covered by |
| // the GNU General Public License. This exception does not however |
| // invalidate any other reasons why the executable file might be covered by |
| // the GNU General Public License. |
| |
| /** @file concept_check.h |
| * This is an internal header file, included by other library headers. |
| * You should not attempt to use it directly. |
| */ |
| |
| #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 |