70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
/** \file
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Provide STL extensions.
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*/
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/*
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* Copyright © 2001 Sofus Mortensen
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* Copyright © 2013 Alexander Lamaison
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*
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* This material is provided "as is", with absolutely no warranty
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* expressed or implied. Any use is at your own risk. Permission to
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* use or copy this software for any purpose is hereby granted without
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* fee, provided the above notices are retained on all copies.
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* Permission to modify the code and to distribute modified code is
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* granted, provided the above notices are retained, and a notice that
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* the code was modified is included with the above copyright notice.
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*
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* This header is part of Comet version 2.
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* https://github.com/alamaison/comet
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*/
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#ifndef COMET_STL_H
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#define COMET_STL_H
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#include <comet/config.h>
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#include <functional>
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// add identity, select1st, and select2nd.
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#if !defined(__SGI_STL_PORT) && !defined(__MINGW32__)
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namespace std {
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/** \internal
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*/
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template<typename T> struct identity : public unary_function<T, T> {
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T operator()(const T& t) { return t; }
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};
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/** \internal
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*/
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template<typename T> struct select1st : public unary_function<typename T::first_type, T> {
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typename T::first_type operator()(const T& t) { return t.first; }
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};
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/** \internal
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*/
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template<typename T> struct select2nd : public unary_function<typename T::second_type, T> {
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typename T::second_type operator()(const T& t) { return t.second; }
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};
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}
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#else
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#include <functional>
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#endif
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template<typename T> class delete_fun : public std::unary_function<T, void> {
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public:
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void operator()(T& x) { delete x; }
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};
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template<typename T> class delete2nd_fun : public std::unary_function<T, void> {
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public:
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void operator()(T& x) { delete x.second; }
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};
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template<typename T> class delete1st_fun : public std::unary_function<T, void> {
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public:
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void operator()(T& x) { delete x.first; }
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};
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#endif
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