blob: 1957451bc64aaa2e17d60c508b108d44f84d9cde [file] [log] [blame]
//===----------------------------------------------------------------------===//
//
// 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 Predicate>
// typename basic_string<charT, traits, Allocator>::size_type
// erase_if(basic_string<charT, traits, Allocator>& c, Predicate pred);
#include <string>
#include "test_macros.h"
#include "test_allocator.h"
#include "min_allocator.h"
template <class S, class Pred>
void test0(S s, Pred p, S expected, size_t expected_erased_count) {
ASSERT_SAME_TYPE(typename S::size_type, decltype(std::erase_if(s, p)));
assert(expected_erased_count == std::erase_if(s, p));
LIBCPP_ASSERT(s.__invariants());
assert(s == expected);
}
template <typename S>
void test()
{
auto isA = [](auto ch) { return ch == 'a';};
auto isB = [](auto ch) { return ch == 'b';};
auto isC = [](auto ch) { return ch == 'c';};
auto isD = [](auto ch) { return ch == 'd';};
auto True = [](auto) { return true; };
auto False = [](auto) { return false; };
test0(S(""), isA, S(""), 0);
test0(S("a"), isA, S(""), 1);
test0(S("a"), isB, S("a"), 0);
test0(S("ab"), isA, S("b"), 1);
test0(S("ab"), isB, S("a"), 1);
test0(S("ab"), isC, S("ab"), 0);
test0(S("aa"), isA, S(""), 2);
test0(S("aa"), isC, S("aa"), 0);
test0(S("abc"), isA, S("bc"), 1);
test0(S("abc"), isB, S("ac"), 1);
test0(S("abc"), isC, S("ab"), 1);
test0(S("abc"), isD, S("abc"), 0);
test0(S("aab"), isA, S("b"), 2);
test0(S("aab"), isB, S("aa"), 1);
test0(S("aab"), isC, S("aab"), 0);
test0(S("abb"), isA, S("bb"), 1);
test0(S("abb"), isB, S("a"), 2);
test0(S("abb"), isC, S("abb"), 0);
test0(S("aaa"), isA, S(""), 3);
test0(S("aaa"), isB, S("aaa"), 0);
test0(S("aba"), False, S("aba"), 0);
test0(S("aba"), True, S(""), 3);
}
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;
}