55 lines · cpp
1// RUN: %clang_cc1 -fsyntax-only -std=c++11 %s -verify2// RUN: %clang_cc1 -fsyntax-only -std=c++11 %s -verify -triple i386-windows3 4void defargs() {5 auto l1 = [](int i, int j = 17, int k = 18) { return i + j + k; };6 int i1 = l1(1);7 int i2 = l1(1, 2);8 int i3 = l1(1, 2, 3);9}10 11 12void defargs_errors() {13 auto l1 = [](int i,14 int j = 17,15 int k) { }; // expected-error{{missing default argument on parameter 'k'}}16 17 auto l2 = [](int i, int j = i) {}; // expected-error{{default argument references parameter 'i'}}18 19 int foo;20 auto l3 = [](int i = foo) {}; // expected-error{{default argument references local variable 'foo' of enclosing function}}21}22 23struct NonPOD {24 NonPOD();25 NonPOD(const NonPOD&);26 ~NonPOD();27};28 29struct NoDefaultCtor {30 NoDefaultCtor(const NoDefaultCtor&); // expected-note{{candidate constructor}} \31 // expected-note{{candidate constructor not viable: requires 1 argument, but 0 were provided}}32 ~NoDefaultCtor();33};34 35template<typename T>36void defargs_in_template_unused(T t) {37 auto l1 = [](const T& value = T()) { }; // expected-error{{no matching constructor for initialization of 'NoDefaultCtor'}} \38 // expected-note {{in instantiation of default function argument expression for 'operator()<NoDefaultCtor>' required here}}39 l1(t);40}41 42template void defargs_in_template_unused(NonPOD);43template void defargs_in_template_unused(NoDefaultCtor); // expected-note{{in instantiation of function template specialization 'defargs_in_template_unused<NoDefaultCtor>' requested here}}44 45template<typename T>46void defargs_in_template_used() {47 auto l1 = [](const T& value = T()) { }; // expected-error{{no matching constructor for initialization of 'NoDefaultCtor'}} \48 // expected-note {{in instantiation of default function argument expression for 'operator()<NoDefaultCtor>' required here}}49 l1();50}51 52template void defargs_in_template_used<NonPOD>();53template void defargs_in_template_used<NoDefaultCtor>(); // expected-note{{in instantiation of function template specialization}}54 55