forked from OSchip/llvm-project
28 lines
916 B
C++
28 lines
916 B
C++
// RUN: rm -rf %t
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// RUN: %clang_cc1 -std=c++20 -fmodules-cache-path=%t -x c++ %s -verify
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// expected-no-diagnostics
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#pragma clang module build std
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module std [system] { module concepts [system] {} }
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#pragma clang module contents
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#pragma clang module begin std.concepts
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template <class T>
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T declval();
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template<class T, class U>
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concept common_reference_with = T::val;
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template<class T>
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concept input_or_output_iterator = true;
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template <class T>
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concept input_iterator = input_or_output_iterator<T> &&
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common_reference_with<decltype(declval<T&>)&&, T&>;
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#pragma clang module end /*std.concepts*/
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#pragma clang module endbuild /*std*/
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#pragma clang module import std.concepts
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template<input_or_output_iterator>
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struct iter_value_or_void{};
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// ensure that we don't assert on a subsumption check due to improper
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// deserialization.
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template<input_iterator I>
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struct iter_value_or_void<I>{};
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