7149bb7068
The libc++ test suite has a lot of old Lit features used to XFAIL tests and mark them as UNSUPPORTED. Many of them are to workaround problems on old compilers or old platforms. As time goes by, it is good to go and clean those up to simplify the configuration of the test suite, and also to reflect the testing reality. It's not useful to have markup that gives the impression that e.g. clang-3.3 is supported, when we don't really test on it anymore (and hence several new tests probably don't have the necessary markup on them).
137 lines
2.4 KiB
C++
137 lines
2.4 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <string>
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// Split into two calls for C++20
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// void reserve();
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// void reserve(size_type res_arg);
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#include <string>
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#include <stdexcept>
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#include <cassert>
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#include "test_macros.h"
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#include "min_allocator.h"
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template <class S>
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void
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test(S s)
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{
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typename S::size_type old_cap = s.capacity();
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S s0 = s;
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s.reserve();
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LIBCPP_ASSERT(s.__invariants());
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assert(s == s0);
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assert(s.capacity() <= old_cap);
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assert(s.capacity() >= s.size());
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}
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template <class S>
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void
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test(S s, typename S::size_type res_arg)
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{
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typename S::size_type old_cap = s.capacity();
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((void)old_cap); // Prevent unused warning
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S s0 = s;
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if (res_arg <= s.max_size())
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{
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s.reserve(res_arg);
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assert(s == s0);
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assert(s.capacity() >= res_arg);
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assert(s.capacity() >= s.size());
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#if TEST_STD_VER > 17
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assert(s.capacity() >= old_cap); // resize never shrinks as of P0966
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#endif
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}
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#ifndef TEST_HAS_NO_EXCEPTIONS
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else
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{
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try
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{
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s.reserve(res_arg);
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assert(false);
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}
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catch (std::length_error&)
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{
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assert(res_arg > s.max_size());
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}
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}
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#endif
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}
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int main(int, char**)
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{
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{
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typedef std::string S;
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{
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S s;
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test(s);
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s.assign(10, 'a');
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s.erase(5);
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test(s);
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s.assign(100, 'a');
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s.erase(50);
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test(s);
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}
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{
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S s;
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test(s, 5);
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test(s, 10);
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test(s, 50);
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}
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{
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S s(100, 'a');
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s.erase(50);
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test(s, 5);
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test(s, 10);
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test(s, 50);
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test(s, 100);
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test(s, 1000);
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test(s, S::npos);
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}
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}
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#if TEST_STD_VER >= 11
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{
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typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
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{
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S s;
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test(s);
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s.assign(10, 'a');
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s.erase(5);
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test(s);
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s.assign(100, 'a');
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s.erase(50);
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test(s);
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}
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{
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S s;
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test(s, 5);
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test(s, 10);
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test(s, 50);
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}
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{
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S s(100, 'a');
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s.erase(50);
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test(s, 5);
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test(s, 10);
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test(s, 50);
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test(s, 100);
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test(s, 1000);
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test(s, S::npos);
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}
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}
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#endif
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return 0;
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}
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