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// bool operator<(const charT* lhs, const basic_string<charT,traits,Allocator>& rhs); // constexpr since C++20
13
14#include <string>
15#include <cassert>
16
17#include "test_macros.h"
18#include "min_allocator.h"
19
20template <class S>
21TEST_CONSTEXPR_CXX20 void test(const typename S::value_type* lhs, const S& rhs, bool x) {
22 assert((lhs < rhs) == x);
23}
24
25template <class S>
26TEST_CONSTEXPR_CXX20 void test_string() {
27 test("", S(""), false);
28 test("", S("abcde"), true);
29 test("", S("abcdefghij"), true);
30 test("", S("abcdefghijklmnopqrst"), true);
31 test("abcde", S(""), false);
32 test("abcde", S("abcde"), false);
33 test("abcde", S("abcdefghij"), true);
34 test("abcde", S("abcdefghijklmnopqrst"), true);
35 test("abcdefghij", S(""), false);
36 test("abcdefghij", S("abcde"), false);
37 test("abcdefghij", S("abcdefghij"), false);
38 test("abcdefghij", S("abcdefghijklmnopqrst"), true);
39 test("abcdefghijklmnopqrst", S(""), false);
40 test("abcdefghijklmnopqrst", S("abcde"), false);
41 test("abcdefghijklmnopqrst", S("abcdefghij"), false);
42 test("abcdefghijklmnopqrst", S("abcdefghijklmnopqrst"), false);
43}
44
45TEST_CONSTEXPR_CXX20 bool test() {
46 test_string<std::string>();
47#if TEST_STD_VER >= 11
48 test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char> > >();
49#endif
50
51 return true;
52}
53
54int main(int, char**) {
55 test();
56#if TEST_STD_VER > 17
57 static_assert(test());
58#endif
59
60 return 0;
61}
62

source code of libcxx/test/std/strings/basic.string/string.nonmembers/string_oplt/pointer_string.pass.cpp