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// UNSUPPORTED: c++03, c++11, c++14, c++17
9
10// <string>
11
12// constexpr bool starts_with(charT x) const noexcept;
13
14#include <string>
15#include <cassert>
16
17#include "test_macros.h"
18
19template <class S>
20constexpr void test_string() {
21 S s1{};
22 S s2{"abcde", 5};
23
24 ASSERT_NOEXCEPT(s1.starts_with('e'));
25
26 assert(!s1.starts_with('a'));
27 assert(!s1.starts_with('x'));
28 assert(s2.starts_with('a'));
29 assert(!s2.starts_with('x'));
30}
31
32constexpr bool test() {
33 test_string<std::string>();
34
35 return true;
36}
37
38int main(int, char**) {
39 test();
40 static_assert(test());
41
42 return 0;
43}
44

source code of libcxx/test/std/strings/basic.string/string.starts_with/starts_with.char.pass.cpp