1// RUN: %clang_cc1 -std=c++14 -fconcepts-ts -fcxx-exceptions -x c++ -verify %s 2 3namespace A { 4 template<typename T> concept bool C1() { return true; } 5 6 template<typename T> concept bool C2 = true; 7} 8 9template<typename T> concept bool C3() { return (throw 0, true); } 10static_assert(noexcept(C3<int>()), "function concept should be treated as if noexcept(true) specified"); 11 12template<typename T> concept bool D1(); // expected-error {{function concept declaration must be a definition}} 13 14struct B { 15 template<typename T> concept bool D2() { return true; } // expected-error {{concept declarations may only appear in namespace scope}} 16}; 17 18struct C { 19 template<typename T> static concept bool D3 = true; // expected-error {{concept declarations may only appear in namespace scope}} 20}; 21 22concept bool D4() { return true; } // expected-error {{'concept' can only appear on the definition of a function template or variable template}} 23 24concept bool D5 = true; // expected-error {{'concept' can only appear on the definition of a function template or variable template}} 25 26template<typename T> 27concept bool D6; // expected-error {{variable concept declaration must be initialized}} 28 29template<typename T> 30concept bool D7() throw(int) { return true; } // expected-error {{function concept cannot have exception specification}} 31 32// Tag 33concept class CC1 {}; // expected-error {{'concept' can only appear on the definition of a function template or variable template}} 34concept struct CS1 {}; // expected-error {{'concept' can only appear on the definition of a function template or variable template}} 35concept union CU1 {}; // expected-error {{'concept' can only appear on the definition of a function template or variable template}} 36concept enum CE1 {}; // expected-error {{'concept' can only appear on the definition of a function template or variable template}} 37template <typename T> concept class TCC1 {}; // expected-error {{'concept' can only appear on the definition of a function template or variable template}} 38template <typename T> concept struct TCS1 {}; // expected-error {{'concept' can only appear on the definition of a function template or variable template}} 39template <typename T> concept union TCU1 {}; // expected-error {{'concept' can only appear on the definition of a function template or variable template}} 40typedef concept int CI; // expected-error {{'concept' can only appear on the definition of a function template or variable template}} 41void fpc(concept int i) {} // expected-error {{'concept' can only appear on the definition of a function template or variable template}} 42 43concept bool; // expected-error {{'concept' can only appear on the definition of a function template or variable template}} 44 45template <typename T> concept bool VCEI{ true }; 46template concept bool VCEI<int>; // expected-error {{'concept' cannot be applied on an explicit instantiation}} 47extern template concept bool VCEI<int>; // expected-error {{'concept' cannot be applied on an explicit instantiation}} 48 49template <typename T> concept bool VCPS{ true }; 50template <typename T> concept bool VCPS<T *>{ true }; // expected-error {{'concept' cannot be applied on an partial specialization}} 51 52template <typename T> concept bool VCES{ true }; 53template <> concept bool VCES<int>{ true }; // expected-error {{'concept' cannot be applied on an explicit specialization}} 54 55template <typename T> concept bool FCEI() { return true; } 56template concept bool FCEI<int>(); // expected-error {{'concept' cannot be applied on an explicit instantiation}} 57extern template concept bool FCEI<int>(); // expected-error {{'concept' cannot be applied on an explicit instantiation}} 58 59template <typename T> concept bool FCES() { return true; } 60template <> concept bool FCES<bool>() { return true; } // expected-error {{'concept' cannot be applied on an explicit specialization}} 61