libcxx/include/experimental/functional

// -*- C++ -*-
//===-------------------------- functional --------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#ifndef _LIBCPP_EXPERIMENTAL_FUNCTIONAL
#define _LIBCPP_EXPERIMENTAL_FUNCTIONAL

/*
   experimental/functional synopsis

#include <algorithm>

namespace std {
namespace experimental {
inline namespace fundamentals_v1 {

    // See C++14 §20.9.9, Function object binders
    template <class T> constexpr bool is_bind_expression_v
      = is_bind_expression<T>::value;
    template <class T> constexpr int is_placeholder_v
      = is_placeholder<T>::value;

    // 4.2, Class template function
    template<class> class function; // undefined
    template<class R, class... ArgTypes> class function<R(ArgTypes...)>;

    template<class R, class... ArgTypes>
    void swap(function<R(ArgTypes...)>&, function<R(ArgTypes...)>&);

    template<class R, class... ArgTypes>
    bool operator==(const function<R(ArgTypes...)>&, nullptr_t) noexcept;
    template<class R, class... ArgTypes>
    bool operator==(nullptr_t, const function<R(ArgTypes...)>&) noexcept;
    template<class R, class... ArgTypes>
    bool operator!=(const function<R(ArgTypes...)>&, nullptr_t) noexcept;
    template<class R, class... ArgTypes>
    bool operator!=(nullptr_t, const function<R(ArgTypes...)>&) noexcept;

    // 4.3, Searchers
    template<class ForwardIterator, class BinaryPredicate = equal_to<>>
      class default_searcher;

    template<class RandomAccessIterator,
             class Hash = hash<typename iterator_traits<RandomAccessIterator>::value_type>,
             class BinaryPredicate = equal_to<>>
      class boyer_moore_searcher;

    template<class RandomAccessIterator,
             class Hash = hash<typename iterator_traits<RandomAccessIterator>::value_type>,
             class BinaryPredicate = equal_to<>>
      class boyer_moore_horspool_searcher;

    template<class ForwardIterator, class BinaryPredicate = equal_to<>>
    default_searcher<ForwardIterator, BinaryPredicate>
    make_default_searcher(ForwardIterator pat_first, ForwardIterator pat_last,
                          BinaryPredicate pred = BinaryPredicate());

    template<class RandomAccessIterator,
             class Hash = hash<typename iterator_traits<RandomAccessIterator>::value_type>,
             class BinaryPredicate = equal_to<>>
    boyer_moore_searcher<RandomAccessIterator, Hash, BinaryPredicate>
    make_boyer_moore_searcher(
        RandomAccessIterator pat_first, RandomAccessIterator pat_last,
        Hash hf = Hash(), BinaryPredicate pred = BinaryPredicate());

    template<class RandomAccessIterator,
             class Hash = hash<typename iterator_traits<RandomAccessIterator>::value_type>,
             class BinaryPredicate = equal_to<>>
    boyer_moore_horspool_searcher<RandomAccessIterator, Hash, BinaryPredicate>
    make_boyer_moore_horspool_searcher(
        RandomAccessIterator pat_first, RandomAccessIterator pat_last,
        Hash hf = Hash(), BinaryPredicate pred = BinaryPredicate());

  } // namespace fundamentals_v1
  } // namespace experimental

  template<class R, class... ArgTypes, class Alloc>
  struct uses_allocator<experimental::function<R(ArgTypes...)>, Alloc>;

} // namespace std

*/

#include <experimental/__config>
#include <functional>
#include <algorithm>

#include <__undef_min_max>

#include <__debug>

#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#pragma GCC system_header
#endif

_LIBCPP_BEGIN_NAMESPACE_LFTS

// default searcher
template<class _ForwardIterator, class _BinaryPredicate = equal_to<>>
class default_searcher {
public:
    default_searcher(_ForwardIterator __f, _ForwardIterator __l, 
                       _BinaryPredicate __p = _BinaryPredicate())
        : __first_(__f), __last_(__l), __pred_(__p) {}

    template <typename _ForwardIterator2>
    _ForwardIterator2 operator () (_ForwardIterator2 __f, _ForwardIterator2 __l) const {
        return _VSTD::search(__f, __l, __first_, __last_, __pred_);
        }

private:
    _ForwardIterator __first_;
    _ForwardIterator __last_;
    _BinaryPredicate __pred_;
    };

template<class _ForwardIterator, class _BinaryPredicate = equal_to<>>
default_searcher<_ForwardIterator, _BinaryPredicate>
make_default_searcher( _ForwardIterator __f, _ForwardIterator __l, _BinaryPredicate __p = _BinaryPredicate ())
{
    return default_searcher<_ForwardIterator, _BinaryPredicate>(__f, __l, __p);
}


_LIBCPP_END_NAMESPACE_LFTS

#endif /* _LIBCPP_EXPERIMENTAL_FUNCTIONAL */