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
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// <string>
// template<class charT, class traits, class Allocator>
// basic_string<charT,traits,Allocator>
// operator+(const basic_string<charT,traits,Allocator>& lhs, charT rhs); // constexpr since C++20
// template<class charT, class traits, class Allocator>
// basic_string<charT,traits,Allocator>&&
// operator+(basic_string<charT,traits,Allocator>&& lhs, charT rhs); // constexpr since C++20
#include <string>
#include <utility>
#include <cassert>
#include "test_macros.h"
#include "min_allocator.h"
template <class S>
TEST_CONSTEXPR_CXX20 void test0(const S& lhs, typename S::value_type rhs, const S& x) {
assert(lhs + rhs == x);
}
#if TEST_STD_VER >= 11
template <class S>
TEST_CONSTEXPR_CXX20 void test1(S&& lhs, typename S::value_type rhs, const S& x) {
assert(std::move(lhs) + rhs == x);
}
#endif
TEST_CONSTEXPR_CXX20 bool test() {
{
typedef std::string S;
test0(S(""), '1', S("1"));
test0(S("abcde"), '1', S("abcde1"));
test0(S("abcdefghij"), '1', S("abcdefghij1"));
test0(S("abcdefghijklmnopqrst"), '1', S("abcdefghijklmnopqrst1"));
}
#if TEST_STD_VER >= 11
{
typedef std::string S;
test1(S(""), '1', S("1"));
test1(S("abcde"), '1', S("abcde1"));
test1(S("abcdefghij"), '1', S("abcdefghij1"));
test1(S("abcdefghijklmnopqrst"), '1', S("abcdefghijklmnopqrst1"));
}
{
typedef std::basic_string<char, std::char_traits<char>,
min_allocator<char> >
S;
test0(S(""), '1', S("1"));
test0(S("abcde"), '1', S("abcde1"));
test0(S("abcdefghij"), '1', S("abcdefghij1"));
test0(S("abcdefghijklmnopqrst"), '1', S("abcdefghijklmnopqrst1"));
test1(S(""), '1', S("1"));
test1(S("abcde"), '1', S("abcde1"));
test1(S("abcdefghij"), '1', S("abcdefghij1"));
test1(S("abcdefghijklmnopqrst"), '1', S("abcdefghijklmnopqrst1"));
}
#endif
return true;
}
int main(int, char**) {
test();
#if TEST_STD_VER > 17
static_assert(test());
#endif
return 0;
}
|
