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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(string_view x) const noexcept;
#include <string>
#include <cassert>
#include "test_macros.h"
template <class CharT, template <class> class Alloc>
constexpr void test_string() {
using S = std::basic_string<CharT, std::char_traits<CharT>, Alloc<CharT> >;
using SV = std::basic_string_view<CharT, std::char_traits<CharT> >;
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};
SV sv0;
SV sv1{s, 1};
SV sv2{s, 2};
SV sv3{s, 3};
SV sv4{s, 4};
SV sv5{s, 5};
SV svNot{"def", 3};
ASSERT_NOEXCEPT(s0.starts_with(sv0));
assert(s0.starts_with(sv0));
assert(!s0.starts_with(sv1));
assert(s1.starts_with(sv0));
assert(s1.starts_with(sv1));
assert(!s1.starts_with(sv2));
assert(!s1.starts_with(sv3));
assert(!s1.starts_with(sv4));
assert(!s1.starts_with(sv5));
assert(!s1.starts_with(svNot));
assert(s2.starts_with(sv0));
assert(s2.starts_with(sv1));
assert(s2.starts_with(sv2));
assert(!s2.starts_with(sv3));
assert(!s2.starts_with(sv4));
assert(!s2.starts_with(sv5));
assert(!s2.starts_with(svNot));
assert(sNot.starts_with(sv0));
assert(!sNot.starts_with(sv1));
assert(!sNot.starts_with(sv2));
assert(!sNot.starts_with(sv3));
assert(!sNot.starts_with(sv4));
assert(!sNot.starts_with(sv5));
assert(sNot.starts_with(svNot));
}
constexpr bool test() {
test_string<char, std::allocator>();
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
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