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// RUN: %clang_cc1 -fsyntax-only -std=c++11 %s -Wno-lambda-extensions -verify
void defargs() {
auto l1 = [](int i, int j = 17, int k = 18) { return i + j + k; };
int i1 = l1(1);
int i2 = l1(1, 2);
int i3 = l1(1, 2, 3);
}
void defargs_errors() {
auto l1 = [](int i,
int j = 17,
int k) { }; // expected-error{{missing default argument on parameter 'k'}}
auto l2 = [](int i, int j = i) {}; // expected-error{{default argument references parameter 'i'}}
int foo;
auto l3 = [](int i = foo) {}; // expected-error{{default argument references local variable 'foo' of enclosing function}}
}
struct NonPOD {
NonPOD();
NonPOD(const NonPOD&);
~NonPOD();
};
struct NoDefaultCtor {
NoDefaultCtor(const NoDefaultCtor&); // expected-note{{candidate constructor}}
~NoDefaultCtor();
};
template<typename T>
void defargs_in_template_unused(T t) {
auto l1 = [](const T& value = T()) { };
l1(t);
}
template void defargs_in_template_unused(NonPOD);
template void defargs_in_template_unused(NoDefaultCtor);
template<typename T>
void defargs_in_template_used() {
auto l1 = [](const T& value = T()) { }; // expected-error{{no matching constructor for initialization of 'NoDefaultCtor'}}
l1(); // expected-note{{in instantiation of default function argument expression for 'operator()<NoDefaultCtor>' required here}}
}
template void defargs_in_template_used<NonPOD>();
template void defargs_in_template_used<NoDefaultCtor>(); // expected-note{{in instantiation of function template specialization}}
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