//===----------------------------------------------------------------------===//
//
// 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 ends_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 + 4, 1};
  S s2{s + 3, 2};
  //  S   s3  { s + 2, 3 };
  //  S   s4  { s + 1, 4 };
  //  S   s5  { s,     5 };
  S sNot{"def", 3};

  LIBCPP_ASSERT_NOEXCEPT(s0.ends_with(""));

  assert(s0.ends_with(""));
  assert(!s0.ends_with("e"));

  assert(s1.ends_with(""));
  assert(s1.ends_with("e"));
  assert(!s1.ends_with("de"));
  assert(!s1.ends_with("cde"));
  assert(!s1.ends_with("bcde"));
  assert(!s1.ends_with("abcde"));
  assert(!s1.ends_with("def"));

  assert(s2.ends_with(""));
  assert(s2.ends_with("e"));
  assert(s2.ends_with("de"));
  assert(!s2.ends_with("cde"));
  assert(!s2.ends_with("bcde"));
  assert(!s2.ends_with("abcde"));
  assert(!s2.ends_with("def"));

  assert(sNot.ends_with(""));
  assert(!sNot.ends_with("e"));
  assert(!sNot.ends_with("de"));
  assert(!sNot.ends_with("cde"));
  assert(!sNot.ends_with("bcde"));
  assert(!sNot.ends_with("abcde"));
  assert(sNot.ends_with("def"));
}

constexpr bool test() {
  test_string<std::string>();

  return true;
}

int main(int, char**) {
  test();
  static_assert(test());

  return 0;
}