1 // { dg-options "-std=c++17 -fconcepts" }
4 concept bool C1 = __is_same_as(T, int);
7 concept bool C2 = N == 0;
9 template<template<typename> class X>
10 concept bool C3 = false;
12 template<typename> struct Foo;
14 template<C1... Ts> struct S1 { };
15 template<C2... Ns> struct S2 { };
16 template<C3... Xs> struct S3 { };
18 S1<int, int, bool> s1; // { dg-error "constraint failure|invalid type" }
19 S2<0, 1, 2> s2; // { dg-error "constraint failure|invalid type" }
20 S3<Foo> s3; // { dg-error "constraint failure|invalid type" }