// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// SPDX-FileCopyrightText: Copyright (c) 2023 NVIDIA CORPORATION & AFFILIATES.
//
//===----------------------------------------------------------------------===//

#ifndef _LIBCUDACXX___FUNCTIONAL_BINDER1ST_H
#define _LIBCUDACXX___FUNCTIONAL_BINDER1ST_H

#ifndef __cuda_std__
#include <__config>
#endif // __cuda_std__

#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
#  pragma GCC system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
#  pragma clang system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
#  pragma system_header
#endif // no system header

#include "../__functional/unary_function.h"

_LIBCUDACXX_BEGIN_NAMESPACE_STD

#if _CCCL_STD_VER <= 2014 || defined(_LIBCUDACXX_ENABLE_CXX17_REMOVED_BINDERS)

_CCCL_SUPPRESS_DEPRECATED_PUSH

template <class __Operation>
class _LIBCUDACXX_TEMPLATE_VIS _LIBCUDACXX_DEPRECATED_IN_CXX11 binder1st
    : public __unary_function<typename __Operation::second_argument_type, typename __Operation::result_type>
{
protected:
    __Operation                               op;
    typename __Operation::first_argument_type value;
public:
    _LIBCUDACXX_INLINE_VISIBILITY binder1st(const __Operation& __x,
                               const typename __Operation::first_argument_type __y)
        : op(__x), value(__y) {}
    _CCCL_EXEC_CHECK_DISABLE
    _LIBCUDACXX_INLINE_VISIBILITY typename __Operation::result_type operator()
        (typename __Operation::second_argument_type& __x) const
            {return op(value, __x);}
    _CCCL_EXEC_CHECK_DISABLE
    _LIBCUDACXX_INLINE_VISIBILITY typename __Operation::result_type operator()
        (const typename __Operation::second_argument_type& __x) const
            {return op(value, __x);}
};

template <class __Operation, class _Tp>
_LIBCUDACXX_DEPRECATED_IN_CXX11 inline _LIBCUDACXX_INLINE_VISIBILITY
binder1st<__Operation>
bind1st(const __Operation& __op, const _Tp& __x)
    {return binder1st<__Operation>(__op, __x);}

_CCCL_SUPPRESS_DEPRECATED_POP

#endif // _CCCL_STD_VER <= 2014 || defined(_LIBCUDACXX_ENABLE_CXX17_REMOVED_BINDERS)

_LIBCUDACXX_END_NAMESPACE_STD

#endif // _LIBCUDACXX___FUNCTIONAL_BINDER1ST_H
