c352fa7407
Since LIBCXX_ENABLE_FILESYSTEM now truly represents whether the platform supports a filesystem (as opposed to whether the <filesystem> library is provided), we can provide a few additional classes from the <filesystem> library even when the platform does not have support for a filesystem. For example, this allows performing path manipulations using std::filesystem::path even on platforms where there is no actual filesystem. rdar://107061236 Differential Revision: https://reviews.llvm.org/D152382
67 lines
1.8 KiB
C++
67 lines
1.8 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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// UNSUPPORTED: c++03
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// UNSUPPORTED: availability-filesystem-missing
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// <filesystem>
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// void swap(path& lhs, path& rhs) noexcept;
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#include "filesystem_include.h"
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#include <type_traits>
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#include <cassert>
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#include "test_macros.h"
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#include "count_new.h"
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// NOTE: this is tested in path.members/path.modifiers via the member swap.
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int main(int, char**)
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{
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using namespace fs;
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const char* value1 = "foo/bar/baz";
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const char* value2 = "_THIS_IS_LONG_THIS_IS_LONG_THIS_IS_LONG_THIS_IS_LONG_THIS_IS_LONG_THIS_IS_LONG_THIS_IS_LONG";
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{
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path p1(value1);
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path p2(value2);
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fs::path::string_type ps1 = p1.native();
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fs::path::string_type ps2 = p2.native();
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DisableAllocationGuard g;
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swap(p1, p2);
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ASSERT_NOEXCEPT(swap(p1, p2));
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ASSERT_SAME_TYPE(void, decltype(swap(p1, p2)));
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assert(p1.native() == ps2);
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assert(p2.native() == ps1);
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swap(p1, p2);
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assert(p1.native() == ps1);
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assert(p2.native() == ps2);
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}
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// Test the swap two-step idiom
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{
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path p1(value1);
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path p2(value2);
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fs::path::string_type ps1 = p1.native();
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fs::path::string_type ps2 = p2.native();
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DisableAllocationGuard g;
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using namespace std;
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swap(p1, p2);
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ASSERT_NOEXCEPT(swap(p1, p2));
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ASSERT_SAME_TYPE(void, decltype(swap(p1, p2)));
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assert(p1.native() == ps2);
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assert(p2.native() == ps1);
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swap(p1, p2);
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assert(p1.native() == ps1);
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assert(p2.native() == ps2);
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}
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return 0;
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}
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