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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
// <string>
// template <class charT, class traits, class Allocator, class U>
// void 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>
test0(S s, U val, S expected)
ASSERT_SAME_TYPE(void, decltype(std::erase(s, val)));
std::erase(s, val);
assert(s == expected);
template <class S>
void test()
test0(S(""), 'a', S(""));
test0(S("a"), 'a', S(""));
test0(S("a"), 'b', S("a"));
test0(S("ab"), 'a', S("b"));
test0(S("ab"), 'b', S("a"));
test0(S("ab"), 'c', S("ab"));
test0(S("aa"), 'a', S(""));
test0(S("aa"), 'c', S("aa"));
test0(S("abc"), 'a', S("bc"));
test0(S("abc"), 'b', S("ac"));
test0(S("abc"), 'c', S("ab"));
test0(S("abc"), 'd', S("abc"));
test0(S("aab"), 'a', S("b"));
test0(S("aab"), 'b', S("aa"));
test0(S("aab"), 'c', S("aab"));
test0(S("abb"), 'a', S("bb"));
test0(S("abb"), 'b', S("a"));
test0(S("abb"), 'c', S("abb"));
test0(S("aaa"), 'a', S(""));
test0(S("aaa"), 'b', S("aaa"));
// Test cross-type erasure
using opt = std::optional<typename S::value_type>;
test0(S("aba"), opt(), S("aba"));
test0(S("aba"), opt('a'), S("b"));
test0(S("aba"), opt('b'), S("aa"));
test0(S("aba"), opt('c'), S("aba"));
int main(int, char**)
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;