1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// <functional>
// template <class Fn>
// class binder1st
// : public unary_function<typename Fn::second_argument_type, typename Fn::result_type>
// {
// protected:
// Fn op;
// typename Fn::first_argument_type value;
// public:
// binder2nd(const Fn& x, const typename Fn::second_argument_type& y);
//
// typename Fn::result_type operator()(const typename Fn::first_argument_type& x) const;
// typename Fn::result_type operator()(typename Fn::first_argument_type& x) const;
// };
// REQUIRES: c++03 || c++11 || c++14
// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
#include <functional>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
#include "../test_func.h"
class test
: public std::binder1st<test_func>
{
typedef std::binder1st<test_func> base;
public:
test() : std::binder1st<test_func>(test_func(2), 30) {}
void do_test()
{
static_assert((std::is_base_of<
std::unary_function<test_func::second_argument_type,
test_func::result_type>,
test>::value), "");
assert(op.id() == 2);
assert(value == 30);
double d = 5;
assert((*this)(d) == 35);
assert((*this)(5) == 25);
}
};
int main(int, char**)
{
test t;
t.do_test();
return 0;
}
|
