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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
//
//===----------------------------------------------------------------------===//
// <string>
// size_type rfind(charT c, size_type pos = npos) const; // constexpr since C++20
#include <string>
#include <cassert>
#include "test_macros.h"
#include "min_allocator.h"
template <class S>
TEST_CONSTEXPR_CXX20 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>
TEST_CONSTEXPR_CXX20 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());
}
template <class S>
TEST_CONSTEXPR_CXX20 void test_string() {
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);
}
TEST_CONSTEXPR_CXX20 bool test() {
test_string<std::string>();
#if TEST_STD_VER >= 11
test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char> > >();
#endif
return true;
}
int main(int, char**) {
test();
#if TEST_STD_VER > 17
static_assert(test());
#endif
return 0;
}
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