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, const 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, const 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,const typename S::value_type * rhs,const S & x)28 TEST_CONSTEXPR_CXX20 void test0(const S& lhs, const 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,const typename S::value_type * rhs,const S & x)35 TEST_CONSTEXPR_CXX20 void test1(S&& lhs, const 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(""), "", S(""));
43 test0(S(""), "12345", S("12345"));
44 test0(S(""), "1234567890", S("1234567890"));
45 test0(S(""), "12345678901234567890", S("12345678901234567890"));
46 test0(S("abcde"), "", S("abcde"));
47 test0(S("abcde"), "12345", S("abcde12345"));
48 test0(S("abcde"), "1234567890", S("abcde1234567890"));
49 test0(S("abcde"), "12345678901234567890", S("abcde12345678901234567890"));
50 test0(S("abcdefghij"), "", S("abcdefghij"));
51 test0(S("abcdefghij"), "12345", S("abcdefghij12345"));
52 test0(S("abcdefghij"), "1234567890", S("abcdefghij1234567890"));
53 test0(S("abcdefghij"), "12345678901234567890", S("abcdefghij12345678901234567890"));
54 test0(S("abcdefghijklmnopqrst"), "", S("abcdefghijklmnopqrst"));
55 test0(S("abcdefghijklmnopqrst"), "12345", S("abcdefghijklmnopqrst12345"));
56 test0(S("abcdefghijklmnopqrst"), "1234567890", S("abcdefghijklmnopqrst1234567890"));
57 test0(S("abcdefghijklmnopqrst"), "12345678901234567890", S("abcdefghijklmnopqrst12345678901234567890"));
58 #if TEST_STD_VER >= 11
59 test1(S(""), "", S(""));
60 test1(S(""), "12345", S("12345"));
61 test1(S(""), "1234567890", S("1234567890"));
62 test1(S(""), "12345678901234567890", S("12345678901234567890"));
63 test1(S("abcde"), "", S("abcde"));
64 test1(S("abcde"), "12345", S("abcde12345"));
65 test1(S("abcde"), "1234567890", S("abcde1234567890"));
66 test1(S("abcde"), "12345678901234567890", S("abcde12345678901234567890"));
67 test1(S("abcdefghij"), "", S("abcdefghij"));
68 test1(S("abcdefghij"), "12345", S("abcdefghij12345"));
69 test1(S("abcdefghij"), "1234567890", S("abcdefghij1234567890"));
70 test1(S("abcdefghij"), "12345678901234567890", S("abcdefghij12345678901234567890"));
71 test1(S("abcdefghijklmnopqrst"), "", S("abcdefghijklmnopqrst"));
72 test1(S("abcdefghijklmnopqrst"), "12345", S("abcdefghijklmnopqrst12345"));
73 test1(S("abcdefghijklmnopqrst"), "1234567890", S("abcdefghijklmnopqrst1234567890"));
74 test1(S("abcdefghijklmnopqrst"), "12345678901234567890", S("abcdefghijklmnopqrst12345678901234567890"));
75 #endif
76 }
77
test()78 TEST_CONSTEXPR_CXX20 bool test() {
79 test_string<std::string>();
80 #if TEST_STD_VER >= 11
81 test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char> > >();
82 test_string<std::basic_string<char, std::char_traits<char>, safe_allocator<char> > >();
83 #endif
84
85 return true;
86 }
87
main(int,char **)88 int main(int, char**) {
89 test();
90 #if TEST_STD_VER > 17
91 static_assert(test());
92 #endif
93
94 return 0;
95 }
96