69 lines
1.5 KiB
C++
69 lines
1.5 KiB
C++
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// RUN: %clang_cc1 -fms-extensions -std=c++11 %s -verify
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struct Nontemplate {
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typedef int type;
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};
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template<typename T>
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struct X {
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__if_exists(Nontemplate::type) {
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typedef Nontemplate::type type;
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}
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__if_exists(Nontemplate::value) {
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typedef Nontemplate::value type2;
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}
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__if_not_exists(Nontemplate::value) {
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typedef int type3;
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}
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__if_exists(T::X) { // expected-warning{{dependent __if_exists declarations are ignored}}
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typedef T::X type4;
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}
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};
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X<int>::type i1;
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X<int>::type2 i2; // expected-error{{no type named 'type2' in 'X<int>'}}
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X<int>::type3 i3;
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X<int>::type4 i4; // expected-error{{no type named 'type4' in 'X<int>'}}
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struct HasFoo {
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void foo();
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};
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struct HasBar {
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void bar(int);
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void bar(float);
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};
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template<typename T>
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void f(T t) {
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__if_exists(T::foo) {
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{ }
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t.foo();
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}
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__if_not_exists(T::bar) {
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int *i = t; // expected-error{{no viable conversion from 'HasFoo' to 'int *'}}
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{ }
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}
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int array2[] = {
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0,
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__if_exists(T::bar) {2, }// expected-warning{{dependent __if_exists declarations are ignored}}
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3
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};
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}
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template void f(HasFoo); // expected-note{{in instantiation of function template specialization 'f<HasFoo>' requested here}}
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template void f(HasBar);
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template<typename T, typename ...Ts>
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void g(T, Ts...) {
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__if_exists(T::operator Ts) { // expected-error{{__if_exists name contains unexpanded parameter pack 'Ts'}}
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}
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__if_not_exists(Ts::operator T) { // expected-error{{__if_not_exists name contains unexpanded parameter pack 'Ts'}}
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}
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}
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