77 lines
2.3 KiB
C++
77 lines
2.3 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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>
|
|
|
|
// iterator erase(const_iterator p); // constexpr since C++20
|
|
|
|
#include <string>
|
|
#include <cassert>
|
|
|
|
#include "test_macros.h"
|
|
#include "min_allocator.h"
|
|
|
|
template <class S>
|
|
TEST_CONSTEXPR_CXX20 void
|
|
test(S s, typename S::difference_type pos, S expected)
|
|
{
|
|
typename S::const_iterator p = s.begin() + pos;
|
|
typename S::iterator i = s.erase(p);
|
|
LIBCPP_ASSERT(s.__invariants());
|
|
assert(s[s.size()] == typename S::value_type());
|
|
assert(s == expected);
|
|
assert(i - s.begin() == pos);
|
|
}
|
|
|
|
TEST_CONSTEXPR_CXX20 bool test() {
|
|
{
|
|
typedef std::string S;
|
|
test(S("abcde"), 0, S("bcde"));
|
|
test(S("abcde"), 1, S("acde"));
|
|
test(S("abcde"), 2, S("abde"));
|
|
test(S("abcde"), 4, S("abcd"));
|
|
test(S("abcdefghij"), 0, S("bcdefghij"));
|
|
test(S("abcdefghij"), 1, S("acdefghij"));
|
|
test(S("abcdefghij"), 5, S("abcdeghij"));
|
|
test(S("abcdefghij"), 9, S("abcdefghi"));
|
|
test(S("abcdefghijklmnopqrst"), 0, S("bcdefghijklmnopqrst"));
|
|
test(S("abcdefghijklmnopqrst"), 1, S("acdefghijklmnopqrst"));
|
|
test(S("abcdefghijklmnopqrst"), 10, S("abcdefghijlmnopqrst"));
|
|
test(S("abcdefghijklmnopqrst"), 19, S("abcdefghijklmnopqrs"));
|
|
}
|
|
#if TEST_STD_VER >= 11
|
|
{
|
|
typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
|
|
test(S("abcde"), 0, S("bcde"));
|
|
test(S("abcde"), 1, S("acde"));
|
|
test(S("abcde"), 2, S("abde"));
|
|
test(S("abcde"), 4, S("abcd"));
|
|
test(S("abcdefghij"), 0, S("bcdefghij"));
|
|
test(S("abcdefghij"), 1, S("acdefghij"));
|
|
test(S("abcdefghij"), 5, S("abcdeghij"));
|
|
test(S("abcdefghij"), 9, S("abcdefghi"));
|
|
test(S("abcdefghijklmnopqrst"), 0, S("bcdefghijklmnopqrst"));
|
|
test(S("abcdefghijklmnopqrst"), 1, S("acdefghijklmnopqrst"));
|
|
test(S("abcdefghijklmnopqrst"), 10, S("abcdefghijlmnopqrst"));
|
|
test(S("abcdefghijklmnopqrst"), 19, S("abcdefghijklmnopqrs"));
|
|
}
|
|
#endif
|
|
|
|
return true;
|
|
}
|
|
|
|
int main(int, char**)
|
|
{
|
|
test();
|
|
#if TEST_STD_VER > 17
|
|
static_assert(test());
|
|
#endif
|
|
|
|
return 0;
|
|
}
|