137 lines
2.4 KiB
C++
137 lines
2.4 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>
|
|
|
|
// Split into two calls for C++20
|
|
// void reserve();
|
|
// void reserve(size_type res_arg);
|
|
|
|
#include <string>
|
|
#include <stdexcept>
|
|
#include <cassert>
|
|
|
|
#include "test_macros.h"
|
|
#include "min_allocator.h"
|
|
|
|
template <class S>
|
|
void
|
|
test(S s)
|
|
{
|
|
typename S::size_type old_cap = s.capacity();
|
|
S s0 = s;
|
|
s.reserve();
|
|
LIBCPP_ASSERT(s.__invariants());
|
|
assert(s == s0);
|
|
assert(s.capacity() <= old_cap);
|
|
assert(s.capacity() >= s.size());
|
|
}
|
|
|
|
template <class S>
|
|
void
|
|
test(S s, typename S::size_type res_arg)
|
|
{
|
|
typename S::size_type old_cap = s.capacity();
|
|
((void)old_cap); // Prevent unused warning
|
|
S s0 = s;
|
|
if (res_arg <= s.max_size())
|
|
{
|
|
s.reserve(res_arg);
|
|
assert(s == s0);
|
|
assert(s.capacity() >= res_arg);
|
|
assert(s.capacity() >= s.size());
|
|
#if TEST_STD_VER > 17
|
|
assert(s.capacity() >= old_cap); // resize never shrinks as of P0966
|
|
#endif
|
|
}
|
|
#ifndef TEST_HAS_NO_EXCEPTIONS
|
|
else
|
|
{
|
|
try
|
|
{
|
|
s.reserve(res_arg);
|
|
assert(false);
|
|
}
|
|
catch (std::length_error&)
|
|
{
|
|
assert(res_arg > s.max_size());
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
int main(int, char**)
|
|
{
|
|
{
|
|
typedef std::string S;
|
|
{
|
|
S s;
|
|
test(s);
|
|
|
|
s.assign(10, 'a');
|
|
s.erase(5);
|
|
test(s);
|
|
|
|
s.assign(100, 'a');
|
|
s.erase(50);
|
|
test(s);
|
|
}
|
|
{
|
|
S s;
|
|
test(s, 5);
|
|
test(s, 10);
|
|
test(s, 50);
|
|
}
|
|
{
|
|
S s(100, 'a');
|
|
s.erase(50);
|
|
test(s, 5);
|
|
test(s, 10);
|
|
test(s, 50);
|
|
test(s, 100);
|
|
test(s, 1000);
|
|
test(s, S::npos);
|
|
}
|
|
}
|
|
#if TEST_STD_VER >= 11
|
|
{
|
|
typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
|
|
{
|
|
S s;
|
|
test(s);
|
|
|
|
s.assign(10, 'a');
|
|
s.erase(5);
|
|
test(s);
|
|
|
|
s.assign(100, 'a');
|
|
s.erase(50);
|
|
test(s);
|
|
}
|
|
{
|
|
S s;
|
|
test(s, 5);
|
|
test(s, 10);
|
|
test(s, 50);
|
|
}
|
|
{
|
|
S s(100, 'a');
|
|
s.erase(50);
|
|
test(s, 5);
|
|
test(s, 10);
|
|
test(s, 50);
|
|
test(s, 100);
|
|
test(s, 1000);
|
|
test(s, S::npos);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|