2 //===----------------------------------------------------------------------===//
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-exception
8 //===----------------------------------------------------------------------===//
10 #ifndef _LIBCPP___FUNCTIONAL_BINDER1ST_H
11 #define _LIBCPP___FUNCTIONAL_BINDER1ST_H
14 #include <__functional/unary_function.h>
16 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
17 #pragma GCC system_header
20 _LIBCPP_BEGIN_NAMESPACE_STD
22 #if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_BINDERS)
24 template <class __Operation>
25 class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 binder1st
26 : public unary_function<typename __Operation::second_argument_type,
27 typename __Operation::result_type>
31 typename __Operation::first_argument_type value;
33 _LIBCPP_INLINE_VISIBILITY binder1st(const __Operation& __x,
34 const typename __Operation::first_argument_type __y)
35 : op(__x), value(__y) {}
36 _LIBCPP_INLINE_VISIBILITY typename __Operation::result_type operator()
37 (typename __Operation::second_argument_type& __x) const
38 {return op(value, __x);}
39 _LIBCPP_INLINE_VISIBILITY typename __Operation::result_type operator()
40 (const typename __Operation::second_argument_type& __x) const
41 {return op(value, __x);}
44 template <class __Operation, class _Tp>
45 _LIBCPP_DEPRECATED_IN_CXX11 inline _LIBCPP_INLINE_VISIBILITY
46 binder1st<__Operation>
47 bind1st(const __Operation& __op, const _Tp& __x)
48 {return binder1st<__Operation>(__op, __x);}
50 #endif // _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_BINDERS)
52 _LIBCPP_END_NAMESPACE_STD
54 #endif // _LIBCPP___FUNCTIONAL_BINDER1ST_H