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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
//
//===----------------------------------------------------------------------===//
// <string>
// Split into two calls for C++20
// void reserve();
// void reserve(size_type res_arg);
// When back-deploying to macosx10.7, the RTTI for exception classes
// incorrectly provided by libc++.dylib is mixed with the one in
// libc++abi.dylib and exceptions are not caught properly.
// XFAIL: with_system_cxx_lib=macosx10.7
#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;
}
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