1*adb376ecSDouglas Gregor // RUN: %clang_cc1 -fsyntax-only -std=c++11 %s -Wno-lambda-extensions -verify 2*adb376ecSDouglas Gregor 3*adb376ecSDouglas Gregor void defargs() { 4*adb376ecSDouglas Gregor auto l1 = [](int i, int j = 17, int k = 18) { return i + j + k; }; 5*adb376ecSDouglas Gregor int i1 = l1(1); 6*adb376ecSDouglas Gregor int i2 = l1(1, 2); 7*adb376ecSDouglas Gregor int i3 = l1(1, 2, 3); 8*adb376ecSDouglas Gregor } 9*adb376ecSDouglas Gregor 10*adb376ecSDouglas Gregor 11*adb376ecSDouglas Gregor void defargs_errors() { 12*adb376ecSDouglas Gregor auto l1 = [](int i, 13*adb376ecSDouglas Gregor int j = 17, 14*adb376ecSDouglas Gregor int k) { }; // expected-error{{missing default argument on parameter 'k'}} 15*adb376ecSDouglas Gregor 16*adb376ecSDouglas Gregor auto l2 = [](int i, int j = i) {}; // expected-error{{default argument references parameter 'i'}} 17*adb376ecSDouglas Gregor 18*adb376ecSDouglas Gregor int foo; 19*adb376ecSDouglas Gregor auto l3 = [](int i = foo) {}; // expected-error{{default argument references local variable 'foo' of enclosing function}} 20*adb376ecSDouglas Gregor } 21*adb376ecSDouglas Gregor 22*adb376ecSDouglas Gregor struct NonPOD { 23*adb376ecSDouglas Gregor NonPOD(); 24*adb376ecSDouglas Gregor NonPOD(const NonPOD&); 25*adb376ecSDouglas Gregor ~NonPOD(); 26*adb376ecSDouglas Gregor }; 27*adb376ecSDouglas Gregor 28*adb376ecSDouglas Gregor struct NoDefaultCtor { 29*adb376ecSDouglas Gregor NoDefaultCtor(const NoDefaultCtor&); // expected-note{{candidate constructor}} 30*adb376ecSDouglas Gregor ~NoDefaultCtor(); 31*adb376ecSDouglas Gregor }; 32*adb376ecSDouglas Gregor 33*adb376ecSDouglas Gregor template<typename T> 34*adb376ecSDouglas Gregor void defargs_in_template_unused(T t) { 35*adb376ecSDouglas Gregor auto l1 = [](const T& value = T()) { }; 36*adb376ecSDouglas Gregor l1(t); 37*adb376ecSDouglas Gregor } 38*adb376ecSDouglas Gregor 39*adb376ecSDouglas Gregor template void defargs_in_template_unused(NonPOD); 40*adb376ecSDouglas Gregor template void defargs_in_template_unused(NoDefaultCtor); 41*adb376ecSDouglas Gregor 42*adb376ecSDouglas Gregor template<typename T> 43*adb376ecSDouglas Gregor void defargs_in_template_used() { 44*adb376ecSDouglas Gregor auto l1 = [](const T& value = T()) { }; // expected-error{{no matching constructor for initialization of 'NoDefaultCtor'}} 45*adb376ecSDouglas Gregor l1(); // expected-note{{in instantiation of default function argument expression for 'operator()<NoDefaultCtor>' required here}} 46*adb376ecSDouglas Gregor } 47*adb376ecSDouglas Gregor 48*adb376ecSDouglas Gregor template void defargs_in_template_used<NonPOD>(); 49*adb376ecSDouglas Gregor template void defargs_in_template_used<NoDefaultCtor>(); // expected-note{{in instantiation of function template specialization}} 50*adb376ecSDouglas Gregor 51