Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/concepts/template-parm8.C @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
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date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
children |
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// { dg-do compile { target c++17 } } // { dg-options "-fconcepts" } template<typename T> concept bool C() { return __is_class(T); } template<typename T> concept bool D() { return C<T>() and __is_empty(T); } template<template<typename Q> requires C<Q>() class X> struct S { }; // An unconstrained template can be used as an argument for any // constrained template template parameter. template<typename A> struct T0 { }; S<T0> x1; // Matching constraints are valid. template<typename A> requires C<A>() struct T1 { }; S<T1> x2; int main() { }