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