1 // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s 2 // RUN: %clang_cc1 -fclang-abi-compat=15.0 -std=c++11 -fsyntax-only -verify %s 3 4 template<int ...Values> struct X1; 5 6 template<int ...Values> // expected-note {{non-deducible}} 7 struct X1<0, Values+1 ...>; // expected-error{{contains a template parameter that cannot be deduced}} 8 9 template<typename T, int ...Values> struct X2; // expected-note {{here}} 10 template<int ...Values> struct X2<X1<Values...>, Values+1 ...> {}; // ok (DR1315) 11 X2<X1<1, 2, 3>, 2, 3, 4> x2; // ok 12 X2<X1<1, 2, 3>, 2, 3, 4, 5> x3; // expected-error {{undefined template}} 13