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54 lines
1.8 KiB
C++
54 lines
1.8 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___FUNCTIONAL_BINDER1ST_H
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#define _LIBCPP___FUNCTIONAL_BINDER1ST_H
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#include <__config>
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#include <__functional/unary_function.h>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_BINDERS)
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template <class _Operation>
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class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 binder1st
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: public __unary_function<typename _Operation::second_argument_type, typename _Operation::result_type> {
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protected:
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_Operation op;
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typename _Operation::first_argument_type value;
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public:
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_LIBCPP_HIDE_FROM_ABI binder1st(const _Operation& __x, const typename _Operation::first_argument_type __y)
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: op(__x), value(__y) {}
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_LIBCPP_HIDE_FROM_ABI typename _Operation::result_type
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operator()(typename _Operation::second_argument_type& __x) const {
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return op(value, __x);
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}
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_LIBCPP_HIDE_FROM_ABI typename _Operation::result_type
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operator()(const typename _Operation::second_argument_type& __x) const {
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return op(value, __x);
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}
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};
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template <class _Operation, class _Tp>
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_LIBCPP_DEPRECATED_IN_CXX11 inline _LIBCPP_HIDE_FROM_ABI binder1st<_Operation>
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bind1st(const _Operation& __op, const _Tp& __x) {
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return binder1st<_Operation>(__op, __x);
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}
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#endif // _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_BINDERS)
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___FUNCTIONAL_BINDER1ST_H
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