30 lines
840 B
C++
30 lines
840 B
C++
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// RUN: %clang_cc1 -std=c++2a -x c++ -verify %s
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template<typename T>
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struct X {
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using Y = typename T::invalid;
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};
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template<typename T>
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concept Invalid = X<T>{};
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template<typename T>
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concept False = false; // expected-note{{because 'false' evaluated to false}}
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template<typename T>
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concept True = true;
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// TODO: Concepts: Uncomment trailing requires clauses here when we have correct substitution.
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//template<True T>
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// requires False<T>
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//void g1() requires Invalid<T>;
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//
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//using g1i = decltype(g1<int>());
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template<False T> // expected-note{{because 'int' does not satisfy 'False'}}
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requires Invalid<T>
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void g2(); // requires Invalid<T>;
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// expected-note@-1{{candidate template ignored: constraints not satisfied [with T = int]}}
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using g2i = decltype(g2<int>());
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// expected-error@-1{{no matching function for call to 'g2'}}
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