1 // RUN: %clang_cc1 -fsyntax-only -std=c++11 %s -verify 2 3 void defargs() { 4 auto l1 = [](int i, int j = 17, int k = 18) { return i + j + k; }; 5 int i1 = l1(1); 6 int i2 = l1(1, 2); 7 int i3 = l1(1, 2, 3); 8 } 9 10 11 void defargs_errors() { 12 auto l1 = [](int i, 13 int j = 17, 14 int k) { }; // expected-error{{missing default argument on parameter 'k'}} 15 16 auto l2 = [](int i, int j = i) {}; // expected-error{{default argument references parameter 'i'}} 17 18 int foo; 19 auto l3 = [](int i = foo) {}; // expected-error{{default argument references local variable 'foo' of enclosing function}} 20 } 21 22 struct NonPOD { 23 NonPOD(); 24 NonPOD(const NonPOD&); 25 ~NonPOD(); 26 }; 27 28 struct NoDefaultCtor { 29 NoDefaultCtor(const NoDefaultCtor&); // expected-note{{candidate constructor}} \ 30 // expected-note{{candidate constructor not viable: requires 1 argument, but 0 were provided}} 31 ~NoDefaultCtor(); 32 }; 33 34 template<typename T> 35 void defargs_in_template_unused(T t) { 36 auto l1 = [](const T& value = T()) { }; // expected-error{{no matching constructor for initialization of 'NoDefaultCtor'}} 37 l1(t); 38 } 39 40 template void defargs_in_template_unused(NonPOD); 41 template void defargs_in_template_unused(NoDefaultCtor); // expected-note{{in instantiation of function template specialization 'defargs_in_template_unused<NoDefaultCtor>' requested here}} 42 43 template<typename T> 44 void defargs_in_template_used() { 45 auto l1 = [](const T& value = T()) { }; // expected-error{{no matching constructor for initialization of 'NoDefaultCtor'}} \ 46 // expected-note{{candidate function not viable: requires single argument 'value', but no arguments were provided}} \ 47 // expected-note{{conversion candidate of type 'void (*)(const NoDefaultCtor &)'}} 48 l1(); // expected-error{{no matching function for call to object of type '(lambda at }} 49 } 50 51 template void defargs_in_template_used<NonPOD>(); 52 template void defargs_in_template_used<NoDefaultCtor>(); // expected-note{{in instantiation of function template specialization}} 53 54
