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1// -*- C++ -*-2//===----------------------------------------------------------------------===//3//4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.5// See https://llvm.org/LICENSE.txt for license information.6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception7//8//===----------------------------------------------------------------------===//9 10#ifndef _LIBCPP___CXX03___FUNCTIONAL_BINDER1ST_H11#define _LIBCPP___CXX03___FUNCTIONAL_BINDER1ST_H12 13#include <__cxx03/__config>14#include <__cxx03/__functional/unary_function.h>15 16#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)17# pragma GCC system_header18#endif19 20_LIBCPP_BEGIN_NAMESPACE_STD21 22template <class _Operation>23class _LIBCPP_TEMPLATE_VIS binder1st24 : public __unary_function<typename _Operation::second_argument_type, typename _Operation::result_type> {25protected:26 _Operation op;27 typename _Operation::first_argument_type value;28 29public:30 _LIBCPP_HIDE_FROM_ABI binder1st(const _Operation& __x, const typename _Operation::first_argument_type __y)31 : op(__x), value(__y) {}32 _LIBCPP_HIDE_FROM_ABI typename _Operation::result_type33 operator()(typename _Operation::second_argument_type& __x) const {34 return op(value, __x);35 }36 _LIBCPP_HIDE_FROM_ABI typename _Operation::result_type37 operator()(const typename _Operation::second_argument_type& __x) const {38 return op(value, __x);39 }40};41 42template <class _Operation, class _Tp>43inline _LIBCPP_HIDE_FROM_ABI binder1st<_Operation> bind1st(const _Operation& __op, const _Tp& __x) {44 return binder1st<_Operation>(__op, __x);45}46 47_LIBCPP_END_NAMESPACE_STD48 49#endif // _LIBCPP___CXX03___FUNCTIONAL_BINDER1ST_H50