27 lines
1.2 KiB
C++
27 lines
1.2 KiB
C++
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// RUN: %clang_cc1 -fsyntax-only -verify -std=c++2a %s
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// Make sure we accept this
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template<class X>struct A{typedef X Y;};
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template<class X>bool operator==(A<X>,typename A<X>::Y); // expected-note{{candidate template ignored: could not match 'A<type-parameter-0-0>' against 'B<int> *'}}
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int a(A<int> x) { return operator==(x,1); }
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int a0(A<int> x) { return x == 1; }
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// FIXME: the location information for the note isn't very good
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template<class X>struct B{typedef X Y;};
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template<class X>bool operator==(B<X>*,typename B<X>::Y); // \
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// expected-error{{overloaded 'operator==' must have at least one parameter of class or enumeration type}} \
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// expected-note{{candidate template ignored: substitution failure [with X = int]}}
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int a(B<int> x) { return operator==(&x,1); } // expected-error{{no matching function for call to 'operator=='}} \
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// expected-note{{in instantiation of function template specialization}}
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// Ensure we take parameter list reversal into account in partial oredring.
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namespace CompareOrdering {
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template<typename T> struct A {};
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template<typename T> int operator<=>(A<T>, int) = delete;
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template<typename T> int operator<=>(int, A<T*>);
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// OK, selects the more-specialized reversed function.
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bool b = A<int*>() < 0;
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}
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