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//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// <string>
// constexpr bool starts_with(const CharT *x) const;
#include <string>
#include <cassert>
#include "test_macros.h"
template <class S>
constexpr void test_string() {
const char* s = "abcde";
S s0{};
S s1{s, 1};
S s2{s, 2};
// S s3 { s, 3 };
// S s4 { s, 4 };
// S s5 { s, 5 };
S sNot{"def", 3};
LIBCPP_ASSERT_NOEXCEPT(s0.starts_with(""));
assert(s0.starts_with(""));
assert(!s0.starts_with("a"));
assert(s1.starts_with(""));
assert(s1.starts_with("a"));
assert(!s1.starts_with("ab"));
assert(!s1.starts_with("abc"));
assert(!s1.starts_with("abcd"));
assert(!s1.starts_with("abcde"));
assert(!s1.starts_with("def"));
assert(s2.starts_with(""));
assert(s2.starts_with("a"));
assert(s2.starts_with("ab"));
assert(!s2.starts_with("abc"));
assert(!s2.starts_with("abcd"));
assert(!s2.starts_with("abcde"));
assert(!s2.starts_with("def"));
assert(sNot.starts_with(""));
assert(!sNot.starts_with("a"));
assert(!sNot.starts_with("ab"));
assert(!sNot.starts_with("abc"));
assert(!sNot.starts_with("abcd"));
assert(!sNot.starts_with("abcde"));
assert(sNot.starts_with("def"));
}
constexpr bool test() {
test_string<std::string>();
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
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