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// **************************************************************************
// * This file is part of the zenXML project. It is distributed under the *
// * Boost Software License, Version 1.0. See accompanying file *
// * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt. *
// * Copyright (C) ZenJu (zhnmju123 AT gmx DOT de) - All Rights Reserved *
// **************************************************************************
#ifndef STL_TOOLS_HEADER_84567184321434
#define STL_TOOLS_HEADER_84567184321434
#include <memory>
#include <algorithm>
#if defined _MSC_VER && _MSC_VER <= 1600
#include <set>
#include <map>
#else
#include <unordered_set>
#include <unordered_map>
#endif
//enhancements for <algorithm>
namespace zen
{
//idomatic remove selected elements from container
template <class V, class Predicate>
void vector_remove_if(V& vec, Predicate p);
template <class S, class Predicate>
void set_remove_if(S& set, Predicate p);
template <class M, class Predicate>
void map_remove_if(M& map, Predicate p);
//binary search returning an iterator
template <class ForwardIterator, class T, typename Compare>
ForwardIterator binary_search(ForwardIterator first, ForwardIterator last, const T& value, Compare comp);
template <class BidirectionalIterator, class T>
BidirectionalIterator find_last(BidirectionalIterator first, BidirectionalIterator last, const T& value);
//replacement for std::find_end taking advantage of bidirectional iterators (and giving the algorithm a reasonable name)
template <class BidirectionalIterator1, class BidirectionalIterator2>
BidirectionalIterator1 search_last(BidirectionalIterator1 first1, BidirectionalIterator1 last1,
BidirectionalIterator2 first2, BidirectionalIterator2 last2);
//hash container: proper name + mitigate MSVC performance bug
template <class T> class hash_set;
template <class K, class V> class hash_map;
template<typename T, typename Arg1>
std::unique_ptr<T> make_unique(Arg1&& arg1); //should eventually make it into the std at some time
//######################## implementation ########################
template <class V, class Predicate> inline
void vector_remove_if(V& vec, Predicate p)
{
vec.erase(std::remove_if(vec.begin(), vec.end(), p), vec.end());
}
template <class S, class Predicate> inline
void set_remove_if(S& set, Predicate p)
{
for (auto iter = set.begin(); iter != set.end();)
if (p(*iter))
set.erase(iter++);
else
++iter;
}
template <class M, class Predicate> inline
void map_remove_if(M& map, Predicate p) { set_remove_if(map, p); }
template <class ForwardIterator, class T, typename Compare> inline
ForwardIterator binary_search(ForwardIterator first, ForwardIterator last, const T& value, Compare comp)
{
first = std::lower_bound(first, last, value, comp);
if (first != last && !comp(value, *first))
return first;
else
return last;
}
template <class BidirectionalIterator, class T> inline
BidirectionalIterator find_last(const BidirectionalIterator first, BidirectionalIterator last, const T& value)
{
for (BidirectionalIterator iter = last; iter != first;) //reverse iteration: 1. check 2. decrement 3. evaluate
{
--iter; //
if (*iter == value)
return iter;
}
return last;
}
template <class BidirectionalIterator1, class BidirectionalIterator2> inline
BidirectionalIterator1 search_last(const BidirectionalIterator1 first1, BidirectionalIterator1 last1,
const BidirectionalIterator2 first2, BidirectionalIterator2 last2)
{
const BidirectionalIterator1 iterNotFound = last1;
//reverse iteration: 1. check 2. decrement 3. evaluate
for (;;)
{
BidirectionalIterator1 it1 = last1;
BidirectionalIterator2 it2 = last2;
for (;;)
{
if (it2 == first2) return it1;
if (it1 == first1) return iterNotFound;
--it1;
--it2;
if (*it1 != *it2) break;
}
--last1;
}
}
#if defined _MSC_VER && _MSC_VER <= 1600 //VS2010 performance bug in std::unordered_set<>: http://drdobbs.com/blogs/cpp/232200410 -> should be fixed in VS11
template <class T> class hash_set : public std::set<T> {};
template <class K, class V> class hash_map : public std::map<K, V> {};
#else
template <class T> class hash_set : public std::unordered_set<T> {};
template <class K, class V> class hash_map : public std::unordered_map<K, V> {};
#endif
//as long as variadic templates are not available in MSVC
template<class T, class Arg1> inline std::unique_ptr<T> make_unique(Arg1&& arg1) { return std::unique_ptr<T>(new T(std::forward<Arg1>(arg1))); }
template<class T, class Arg1, class Arg2> inline std::unique_ptr<T> make_unique(Arg1&& arg1, Arg2&& arg2) { return std::unique_ptr<T>(new T(std::forward<Arg1>(arg1), std::forward<Arg2>(arg2))); }
template<class T, class Arg1, class Arg2, class Arg3> inline std::unique_ptr<T> make_unique(Arg1&& arg1, Arg2&& arg2, Arg3&& arg3) { return std::unique_ptr<T>(new T(std::forward<Arg1>(arg1), std::forward<Arg2>(arg2), std::forward<Arg3>(arg3))); }
template<class T, class Arg1, class Arg2, class Arg3, class Arg4> inline std::unique_ptr<T> make_unique(Arg1&& arg1, Arg2&& arg2, Arg3&& arg3, Arg4&& arg4) { return std::unique_ptr<T>(new T(std::forward<Arg1>(arg1), std::forward<Arg2>(arg2), std::forward<Arg3>(arg3), std::forward<Arg4>(arg4))); }
template<class T, class Arg1, class Arg2, class Arg3, class Arg4, class Arg5> inline std::unique_ptr<T> make_unique(Arg1&& arg1, Arg2&& arg2, Arg3&& arg3, Arg4&& arg4, Arg5&& arg5) { return std::unique_ptr<T>(new T(std::forward<Arg1>(arg1), std::forward<Arg2>(arg2), std::forward<Arg3>(arg3), std::forward<Arg4>(arg4), std::forward<Arg5>(arg5))); }
//template<typename T, typename ...Args> inline
//std::unique_ptr<T> make_unique(Args&& ...args)
//{
// return std::unique_ptr<T>(new T( std::forward<Args>(args)... ));
//}
}
#endif //STL_TOOLS_HEADER_84567184321434
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