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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: !stdlib=libc++ && (c++03 || c++11 || c++14)
// <string_view>
// constexpr size_type rfind(charT c, size_type pos = npos) const;
#include <string_view>
#include <cassert>
#include "test_macros.h"
#include "constexpr_char_traits.h"
template <class S>
void test(const S& s, typename S::value_type c, typename S::size_type pos, typename S::size_type x) {
LIBCPP_ASSERT_NOEXCEPT(s.rfind(c, pos));
assert(s.rfind(c, pos) == x);
if (x != S::npos)
assert(x <= pos && x + 1 <= s.size());
}
template <class S>
void test(const S& s, typename S::value_type c, typename S::size_type x) {
LIBCPP_ASSERT_NOEXCEPT(s.rfind(c));
assert(s.rfind(c) == x);
if (x != S::npos)
assert(x + 1 <= s.size());
}
int main(int, char**) {
{
typedef std::string_view S;
test(S(""), 'b', 0, S::npos);
test(S(""), 'b', 1, S::npos);
test(S("abcde"), 'b', 0, S::npos);
test(S("abcde"), 'b', 1, 1);
test(S("abcde"), 'b', 2, 1);
test(S("abcde"), 'b', 4, 1);
test(S("abcde"), 'b', 5, 1);
test(S("abcde"), 'b', 6, 1);
test(S("abcdeabcde"), 'b', 0, S::npos);
test(S("abcdeabcde"), 'b', 1, 1);
test(S("abcdeabcde"), 'b', 5, 1);
test(S("abcdeabcde"), 'b', 9, 6);
test(S("abcdeabcde"), 'b', 10, 6);
test(S("abcdeabcde"), 'b', 11, 6);
test(S("abcdeabcdeabcdeabcde"), 'b', 0, S::npos);
test(S("abcdeabcdeabcdeabcde"), 'b', 1, 1);
test(S("abcdeabcdeabcdeabcde"), 'b', 10, 6);
test(S("abcdeabcdeabcdeabcde"), 'b', 19, 16);
test(S("abcdeabcdeabcdeabcde"), 'b', 20, 16);
test(S("abcdeabcdeabcdeabcde"), 'b', 21, 16);
test(S(""), 'b', S::npos);
test(S("abcde"), 'b', 1);
test(S("abcdeabcde"), 'b', 6);
test(S("abcdeabcdeabcdeabcde"), 'b', 16);
}
#if TEST_STD_VER > 11
{
typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
constexpr SV sv1;
constexpr SV sv2{"abcde", 5};
static_assert(sv1.rfind('b', 0) == SV::npos, "");
static_assert(sv1.rfind('b', 1) == SV::npos, "");
static_assert(sv2.rfind('b', 0) == SV::npos, "");
static_assert(sv2.rfind('b', 1) == 1, "");
static_assert(sv2.rfind('b', 2) == 1, "");
static_assert(sv2.rfind('b', 3) == 1, "");
static_assert(sv2.rfind('b', 4) == 1, "");
}
#endif
return 0;
}
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