907c1196a7
Libc++ is used as a system library on macOS and iOS (amongst others). In order for users to be able to compile a binary that is intended to be deployed to an older version of the platform, clang provides the availability attribute <https://clang.llvm.org/docs/AttributeReference.html#availability>_ that can be placed on declarations to describe the lifecycle of a symbol in the library. See docs/DesignDocs/AvailabilityMarkup.rst for more information. Differential Revision: https://reviews.llvm.org/D31739 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@302172 91177308-0d34-0410-b5e6-96231b3b80d8
110 lines
2.8 KiB
C++
110 lines
2.8 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++98, c++03, c++11
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// XFAIL: with_system_cxx_lib=macosx10.12
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// XFAIL: with_system_cxx_lib=macosx10.11
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// XFAIL: with_system_cxx_lib=macosx10.10
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// XFAIL: with_system_cxx_lib=macosx10.9
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// XFAIL: with_system_cxx_lib=macosx10.7
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// XFAIL: with_system_cxx_lib=macosx10.8
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// <experimental/any>
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// any(any &&) noexcept;
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#include <experimental/any>
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#include <utility>
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#include <type_traits>
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#include <cassert>
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#include "experimental_any_helpers.h"
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#include "count_new.hpp"
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#include "test_macros.h"
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using std::experimental::any;
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using std::experimental::any_cast;
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// Moves are always noexcept. The throws_on_move object
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// must be stored dynamically so the pointer is moved and
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// not the stored object.
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void test_move_does_not_throw()
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{
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#if !defined(TEST_HAS_NO_EXCEPTIONS)
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assert(throws_on_move::count == 0);
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{
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throws_on_move v(42);
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any a(v);
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assert(throws_on_move::count == 2);
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// No allocations should be performed after this point.
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DisableAllocationGuard g; ((void)g);
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try {
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any const a2(std::move(a));
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assertEmpty(a);
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assertContains<throws_on_move>(a2, 42);
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} catch (...) {
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assert(false);
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}
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assert(throws_on_move::count == 1);
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assertEmpty(a);
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}
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assert(throws_on_move::count == 0);
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#endif
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}
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void test_move_empty() {
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DisableAllocationGuard g; ((void)g); // no allocations should be performed.
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any a1;
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any a2(std::move(a1));
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assertEmpty(a1);
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assertEmpty(a2);
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}
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template <class Type>
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void test_move() {
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assert(Type::count == 0);
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Type::reset();
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{
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any a((Type(42)));
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assert(Type::count == 1);
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assert(Type::copied == 0);
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assert(Type::moved == 1);
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// Moving should not perform allocations since it must be noexcept.
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DisableAllocationGuard g; ((void)g);
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any a2(std::move(a));
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assert(Type::moved >= 1); // zero or more move operations can be performed.
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assert(Type::copied == 0); // no copies can be performed.
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assert(Type::count == 1);
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assertEmpty(a); // Moves are always destructive.
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assertContains<Type>(a2, 42);
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}
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assert(Type::count == 0);
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}
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int main()
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{
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// noexcept test
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{
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static_assert(
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std::is_nothrow_move_constructible<any>::value
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, "any must be nothrow move constructible"
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);
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}
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test_move<small>();
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test_move<large>();
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test_move_empty();
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test_move_does_not_throw();
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}
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