cppcheck/lib/cxx11emu.h

67 lines
2.3 KiB
C++

/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2014 Daniel Marjamäki and Cppcheck team.
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 program. If not, see <http://www.gnu.org/licenses/>.
*/
//---------------------------------------------------------------------------
#ifndef cxx11emuH
#define cxx11emuH
//---------------------------------------------------------------------------
/* Emulate certain features of C++11 in a C++98-compatible way. */
#ifdef __cplusplus
#if (__GNUC__ <= 4 && __GNUC_MINOR__ < 6 && !defined(__clang__)) || __cplusplus < 201103L
// Null pointer literal
// Source: SC22/WG21/N2431 = J16/07-0301
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2431.pdf
const // this is a const object...
class {
public:
template<class T> // convertible to any type
operator T*() const { // of null non-member
return 0; // pointer...
}
template<class C, class T> // or any type of null
operator T C::*() const { // member pointer...
return 0;
}
private:
void operator&() const; // whose address can't be taken
} cppcheck_nullptr_impl = {}; // and whose name is nullptr
// An evil workaround for the inability to disable -Wc++0x-compat using a #pragma.
// Once -std=c++0x is embraced, the above class can be renamed to nullptr and
// the define can be removed.
#define nullptr cppcheck_nullptr_impl
// Static assertions
#ifndef static_assert
#define XXJOIN(x, y) XXJOIN_AGAIN(x, y)
#define XXJOIN_AGAIN(x, y) x ## y
#define static_assert(e, msg) \
typedef char XXJOIN(assertion_failed_at_line_, __LINE__) [(e) ? 1 : -1]
#endif // static_assert
#endif // __cplusplus < 201103L
#endif // __cplusplus
//---------------------------------------------------------------------------
#endif // cxx11emuH