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60 lines
1.6 KiB
60 lines
1.6 KiB
4 months ago
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//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <functional>
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// REQUIRES: c++98 || c++03 || c++11 || c++14
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// template <class Fn>
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// class binder1st
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// : public unary_function<typename Fn::second_argument_type, typename Fn::result_type>
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// {
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// protected:
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// Fn op;
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// typename Fn::first_argument_type value;
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// public:
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// binder2nd(const Fn& x, const typename Fn::second_argument_type& y);
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//
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// typename Fn::result_type operator()(const typename Fn::first_argument_type& x) const;
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// typename Fn::result_type operator()(typename Fn::first_argument_type& x) const;
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// };
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#include <functional>
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#include <type_traits>
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#include <cassert>
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#include "../test_func.h"
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class test
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: public std::binder1st<test_func>
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{
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typedef std::binder1st<test_func> base;
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public:
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test() : std::binder1st<test_func>(test_func(2), 30) {}
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void do_test()
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{
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static_assert((std::is_base_of<
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std::unary_function<test_func::second_argument_type,
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test_func::result_type>,
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test>::value), "");
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assert(op.id() == 2);
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assert(value == 30);
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double d = 5;
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assert((*this)(d) == 35);
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assert((*this)(5) == 25);
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}
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};
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int main()
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{
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test t;
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t.do_test();
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}
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