Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/cpp2a/concepts-template-parm8.C @ 145:1830386684a0
gcc-9.2.0
author | anatofuz |
---|---|
date | Thu, 13 Feb 2020 11:34:05 +0900 |
parents | |
children |
line wrap: on
line source
// { dg-do compile { target c++2a } } template<typename T> concept C = __is_class(T); template<typename T> concept D = 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() { }