adb376ec33
lambda expressions. Because these issue was pulled back from Ready status at the Kona meeting, we still emit an ExtWarn when using default arguments for lambda expressions. llvm-svn: 150519
51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -std=c++11 %s -Wno-lambda-extensions -verify
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void defargs() {
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auto l1 = [](int i, int j = 17, int k = 18) { return i + j + k; };
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int i1 = l1(1);
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int i2 = l1(1, 2);
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int i3 = l1(1, 2, 3);
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}
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void defargs_errors() {
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auto l1 = [](int i,
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int j = 17,
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int k) { }; // expected-error{{missing default argument on parameter 'k'}}
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auto l2 = [](int i, int j = i) {}; // expected-error{{default argument references parameter 'i'}}
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int foo;
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auto l3 = [](int i = foo) {}; // expected-error{{default argument references local variable 'foo' of enclosing function}}
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}
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struct NonPOD {
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NonPOD();
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NonPOD(const NonPOD&);
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~NonPOD();
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};
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struct NoDefaultCtor {
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NoDefaultCtor(const NoDefaultCtor&); // expected-note{{candidate constructor}}
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~NoDefaultCtor();
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};
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template<typename T>
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void defargs_in_template_unused(T t) {
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auto l1 = [](const T& value = T()) { };
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l1(t);
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}
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template void defargs_in_template_unused(NonPOD);
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template void defargs_in_template_unused(NoDefaultCtor);
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template<typename T>
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void defargs_in_template_used() {
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auto l1 = [](const T& value = T()) { }; // expected-error{{no matching constructor for initialization of 'NoDefaultCtor'}}
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l1(); // expected-note{{in instantiation of default function argument expression for 'operator()<NoDefaultCtor>' required here}}
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}
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template void defargs_in_template_used<NonPOD>();
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template void defargs_in_template_used<NoDefaultCtor>(); // expected-note{{in instantiation of function template specialization}}
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