39 lines · cpp
1// RUN: %clang_cc1 -std=c++14 -fsyntax-only -verify %s2 3struct A {4 operator __auto_type() {} // expected-error {{'__auto_type' not allowed in conversion function type}}5};6 7__auto_type a() -> int; // expected-error {{function with trailing return type must specify return type 'auto'}}8__auto_type a2(); // expected-error {{'__auto_type' not allowed in function return type}}9template <typename T>10__auto_type b() { return T::x; } // expected-error {{'__auto_type' not allowed in function return type}}11auto c() -> __auto_type { __builtin_unreachable(); } // expected-error {{'__auto_type' not allowed in function return type}}12int d() {13 decltype(__auto_type) e = 1; // expected-error {{expected expression}}14 auto _ = [](__auto_type f) {}; // expected-error {{'__auto_type' not allowed in lambda parameter}}15 __auto_type g = 2;16 struct BitField { int field:2; };17 __auto_type h = BitField{1}.field; // (should work from C++)18 new __auto_type; // expected-error {{'__auto_type' not allowed in type allocated by 'new'}}19}20 21namespace TestDeductionFail {22 23template<typename T>24void caller(T x) {x.fun();} // expected-error {{parameter type 'TestDeductionFail::Abstract' is an abstract class}}25 26template<typename T>27auto getCaller(){28 return caller<T>; // expected-note {{in instantiation of function template specialization 'TestDeductionFail::caller<TestDeductionFail::Abstract>' requested here}}29}30 31class Abstract{32 public:33 void fun();34 virtual void vfun()=0; // expected-note {{unimplemented pure virtual method 'vfun' in 'Abstract'}}35 void call(){getCaller<Abstract>()(*this);} // expected-error {{allocating an object of abstract class type 'TestDeductionFail::Abstract'}}36};37 38}39