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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>
// template <class charT, class traits, class Allocator, class U>
// typename basic_string<charT, traits, Allocator>::size_type
// erase(basic_string<charT, traits, Allocator>& c, const U& value);
#include <string>
#include <optional>
#include "test_macros.h"
#include "test_allocator.h"
#include "min_allocator.h"
template <class S, class U>
void test0(S s, U val, S expected, std::size_t expected_erased_count) {
ASSERT_SAME_TYPE(typename S::size_type, decltype(std::erase(s, val)));
assert(expected_erased_count == std::erase(s, val));
LIBCPP_ASSERT(s.__invariants());
assert(s == expected);
}
template <class S>
void test()
{
test0(S(""), 'a', S(""), 0);
test0(S("a"), 'a', S(""), 1);
test0(S("a"), 'b', S("a"), 0);
test0(S("ab"), 'a', S("b"), 1);
test0(S("ab"), 'b', S("a"), 1);
test0(S("ab"), 'c', S("ab"), 0);
test0(S("aa"), 'a', S(""), 2);
test0(S("aa"), 'c', S("aa"), 0);
test0(S("abc"), 'a', S("bc"), 1);
test0(S("abc"), 'b', S("ac"), 1);
test0(S("abc"), 'c', S("ab"), 1);
test0(S("abc"), 'd', S("abc"), 0);
test0(S("aab"), 'a', S("b"), 2);
test0(S("aab"), 'b', S("aa"), 1);
test0(S("aab"), 'c', S("aab"), 0);
test0(S("abb"), 'a', S("bb"), 1);
test0(S("abb"), 'b', S("a"), 2);
test0(S("abb"), 'c', S("abb"), 0);
test0(S("aaa"), 'a', S(""), 3);
test0(S("aaa"), 'b', S("aaa"), 0);
// Test cross-type erasure
using opt = std::optional<typename S::value_type>;
test0(S("aba"), opt(), S("aba"), 0);
test0(S("aba"), opt('a'), S("b"), 2);
test0(S("aba"), opt('b'), S("aa"), 1);
test0(S("aba"), opt('c'), S("aba"), 0);
}
int main(int, char**)
{
test<std::string>();
test<std::basic_string<char, std::char_traits<char>, min_allocator<char>>> ();
test<std::basic_string<char, std::char_traits<char>, test_allocator<char>>> ();
return 0;
}
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