//===----------------------------------------------------------------------===//
//
// 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_view>

//   constexpr bool ends_with(const CharT *x) const;

#include <string_view>
#include <cassert>

#include "test_macros.h"
#include "constexpr_char_traits.h"

int main(int, char**) {
  {
    typedef std::string_view SV;
    const char* s = "abcde";
    SV sv0{};
    SV sv1{s + 4, 1};
    SV sv2{s + 3, 2};
    SV svNot{"def", 3};

    LIBCPP_ASSERT_NOEXCEPT(sv0.ends_with(""));

    assert(sv0.ends_with(""));
    assert(!sv0.ends_with("e"));

    assert(sv1.ends_with(""));
    assert(sv1.ends_with("e"));
    assert(!sv1.ends_with("de"));
    assert(!sv1.ends_with("cde"));
    assert(!sv1.ends_with("bcde"));
    assert(!sv1.ends_with("abcde"));
    assert(!sv1.ends_with("def"));

    assert(sv2.ends_with(""));
    assert(sv2.ends_with("e"));
    assert(sv2.ends_with("de"));
    assert(!sv2.ends_with("cde"));
    assert(!sv2.ends_with("bcde"));
    assert(!sv2.ends_with("abcde"));
    assert(!sv2.ends_with("def"));

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

#if TEST_STD_VER > 11
  {
    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
    constexpr const char* s = "abcde";
    constexpr SV sv0{};
    constexpr SV sv1{s + 4, 1};
    constexpr SV sv2{s + 3, 2};
    constexpr SV svNot{"def", 3};

    static_assert(sv0.ends_with(""), "");
    static_assert(!sv0.ends_with("e"), "");

    static_assert(sv1.ends_with(""), "");
    static_assert(sv1.ends_with("e"), "");
    static_assert(!sv1.ends_with("de"), "");
    static_assert(!sv1.ends_with("cde"), "");
    static_assert(!sv1.ends_with("bcde"), "");
    static_assert(!sv1.ends_with("abcde"), "");
    static_assert(!sv1.ends_with("def"), "");

    static_assert(sv2.ends_with(""), "");
    static_assert(sv2.ends_with("e"), "");
    static_assert(sv2.ends_with("de"), "");
    static_assert(!sv2.ends_with("cde"), "");
    static_assert(!sv2.ends_with("bcde"), "");
    static_assert(!sv2.ends_with("abcde"), "");
    static_assert(!sv2.ends_with("def"), "");

    static_assert(svNot.ends_with(""), "");
    static_assert(!svNot.ends_with("e"), "");
    static_assert(!svNot.ends_with("de"), "");
    static_assert(!svNot.ends_with("cde"), "");
    static_assert(!svNot.ends_with("bcde"), "");
    static_assert(!svNot.ends_with("abcde"), "");
    static_assert(svNot.ends_with("def"), "");
  }
#endif

  return 0;
}