35 lines
1.1 KiB
C++
35 lines
1.1 KiB
C++
// RUN: %clang_cc1 -std=c++2a -frelaxed-template-template-args -verify %s
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template<typename T> concept C = T::f();
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// expected-note@-1{{similar constraint}}
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template<typename T> concept D = C<T> && T::g();
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template<typename T> concept F = T::f();
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// expected-note@-1{{similar constraint expressions not considered equivalent}}
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template<template<C> class P> struct S1 { }; // expected-note 2{{'P' declared here}}
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template<C> struct X { };
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template<D> struct Y { }; // expected-note{{'Y' declared here}}
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template<typename T> struct Z { };
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template<F> struct W { }; // expected-note{{'W' declared here}}
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S1<X> s11;
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S1<Y> s12; // expected-error{{template template argument 'Y' is more constrained than template template parameter 'P'}}
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S1<Z> s13;
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S1<W> s14; // expected-error{{template template argument 'W' is more constrained than template template parameter 'P'}}
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template<template<typename> class P> struct S2 { };
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S2<X> s21;
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S2<Y> s22;
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S2<Z> s23;
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template <template <typename...> class C>
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struct S3;
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template <C T>
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using N = typename T::type;
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using s31 = S3<N>;
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using s32 = S3<Z>;
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