1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // <string>
10
11 // template<class charT, class traits, class Allocator>
12 // basic_string<charT,traits,Allocator>
13 // operator+(const basic_string<charT,traits,Allocator>& lhs, charT rhs); // constexpr since C++20
14
15 // template<class charT, class traits, class Allocator>
16 // basic_string<charT,traits,Allocator>&&
17 // operator+(basic_string<charT,traits,Allocator>&& lhs, charT rhs); // constexpr since C++20
18
19 #include <string>
20 #include <utility>
21 #include <cassert>
22
23 #include "test_macros.h"
24 #include "min_allocator.h"
25 #include "asan_testing.h"
26
27 template <class S>
test0(const S & lhs,typename S::value_type rhs,const S & x)28 TEST_CONSTEXPR_CXX20 void test0(const S& lhs, typename S::value_type rhs, const S& x) {
29 assert(lhs + rhs == x);
30 LIBCPP_ASSERT(is_string_asan_correct(lhs + rhs));
31 }
32
33 #if TEST_STD_VER >= 11
34 template <class S>
test1(S && lhs,typename S::value_type rhs,const S & x)35 TEST_CONSTEXPR_CXX20 void test1(S&& lhs, typename S::value_type rhs, const S& x) {
36 assert(std::move(lhs) + rhs == x);
37 }
38 #endif
39
40 template <class S>
test_string()41 TEST_CONSTEXPR_CXX20 void test_string() {
42 test0(S(""), '1', S("1"));
43 test0(S(""), '1', S("1"));
44 test0(S("abcde"), '1', S("abcde1"));
45 test0(S("abcdefghij"), '1', S("abcdefghij1"));
46 test0(S("abcdefghijklmnopqrst"), '1', S("abcdefghijklmnopqrst1"));
47
48 #if TEST_STD_VER >= 11
49 test1(S(""), '1', S("1"));
50 test1(S("abcde"), '1', S("abcde1"));
51 test1(S("abcdefghij"), '1', S("abcdefghij1"));
52 test1(S("abcdefghijklmnopqrst"), '1', S("abcdefghijklmnopqrst1"));
53 #endif
54 }
55
test()56 TEST_CONSTEXPR_CXX20 bool test() {
57 test_string<std::string>();
58 #if TEST_STD_VER >= 11
59 test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char> > >();
60 test_string<std::basic_string<char, std::char_traits<char>, safe_allocator<char> > >();
61 #endif
62
63 return true;
64 }
65
main(int,char **)66 int main(int, char**) {
67 test();
68 #if TEST_STD_VER > 17
69 static_assert(test());
70 #endif
71
72 return 0;
73 }
74