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-exception 7 // 8 //===----------------------------------------------------------------------===// 9 10 #ifndef _LIBCPP___FUNCTIONAL_BINDER1ST_H 11 #define _LIBCPP___FUNCTIONAL_BINDER1ST_H 12 13 #include <__config> 14 #include <__functional/unary_function.h> 15 16 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 17 # pragma GCC system_header 18 #endif 19 20 _LIBCPP_BEGIN_NAMESPACE_STD 21 22 #if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_BINDERS) 23 24 template <class __Operation> 25 class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 binder1st 26 : public __unary_function<typename __Operation::second_argument_type, typename __Operation::result_type> 27 { 28 protected: 29 __Operation op; 30 typename __Operation::first_argument_type value; 31 public: 32 _LIBCPP_INLINE_VISIBILITY binder1st(const __Operation& __x, 33 const typename __Operation::first_argument_type __y) 34 : op(__x), value(__y) {} 35 _LIBCPP_INLINE_VISIBILITY typename __Operation::result_type operator() 36 (typename __Operation::second_argument_type& __x) const 37 {return op(value, __x);} 38 _LIBCPP_INLINE_VISIBILITY typename __Operation::result_type operator() 39 (const typename __Operation::second_argument_type& __x) const 40 {return op(value, __x);} 41 }; 42 43 template <class __Operation, class _Tp> 44 _LIBCPP_DEPRECATED_IN_CXX11 inline _LIBCPP_INLINE_VISIBILITY 45 binder1st<__Operation> 46 bind1st(const __Operation& __op, const _Tp& __x) 47 {return binder1st<__Operation>(__op, __x);} 48 49 #endif // _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_BINDERS) 50 51 _LIBCPP_END_NAMESPACE_STD 52 53 #endif // _LIBCPP___FUNCTIONAL_BINDER1ST_H 54