1 // RUN: %clang_cc1 -std=c++14 -fconcepts-ts -x c++ -verify %s 2 3 template <typename T> concept bool FCEI() { return true; } // expected-note {{previous declaration is here}} expected-note {{previous declaration is here}} 4 template bool FCEI<int>(); // expected-error {{function concept cannot be explicitly instantiated}} 5 extern template bool FCEI<double>(); // expected-error {{function concept cannot be explicitly instantiated}} 6 7 template <typename T> concept bool FCES() { return true; } // expected-note {{previous declaration is here}} 8 template <> bool FCES<int>() { return true; } // expected-error {{function concept cannot be explicitly specialized}} 9 10 template <typename T> concept bool VC { true }; // expected-note {{previous declaration is here}} expected-note {{previous declaration is here}} 11 template bool VC<int>; // expected-error {{variable concept cannot be explicitly instantiated}} 12 extern template bool VC<double>; // expected-error {{variable concept cannot be explicitly instantiated}} 13 14 template <typename T> concept bool VCES { true }; // expected-note {{previous declaration is here}} 15 template <> bool VCES<int> { true }; // expected-error {{variable concept cannot be explicitly specialized}} 16 17 template <typename T> concept bool VCPS { true }; // expected-note {{previous declaration is here}} 18 template <typename T> bool VCPS<T *> { true }; // expected-error {{variable concept cannot be partially specialized}} 19
