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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
40 lines
1.5 KiB
C++
40 lines
1.5 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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//
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// Due to C++17 inline variables ASAN flags this test as containing an ODR
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// violation because Clock::is_steady is defined in both the dylib and this TU.
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// UNSUPPORTED: asan
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// Starting with C++17, Clock::is_steady is inlined (but not before LLVM-3.9!),
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// but before C++17 it requires the symbol to be present in the dylib.
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// XFAIL: availability=macosx10.7 && (c++98 || c++03 || c++11 || c++14 || apple-clang-7 || apple-clang-8.0)
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// XFAIL: availability=macosx10.8 && (c++98 || c++03 || c++11 || c++14 || apple-clang-7 || apple-clang-8.0)
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// <chrono>
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// system_clock
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// check clock invariants
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#include <chrono>
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template <class _Tp>
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void test(const _Tp &) {}
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int main()
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{
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typedef std::chrono::system_clock C;
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static_assert((std::is_same<C::rep, C::duration::rep>::value), "");
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static_assert((std::is_same<C::period, C::duration::period>::value), "");
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static_assert((std::is_same<C::duration, C::time_point::duration>::value), "");
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static_assert((std::is_same<C::time_point::clock, C>::value), "");
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static_assert((C::is_steady || !C::is_steady), "");
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test(std::chrono::system_clock::is_steady);
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}
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