82 lines
3.2 KiB
C++
82 lines
3.2 KiB
C++
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// RUN: %clang_cc1 -fsyntax-only -verify -Wc++11-compat %s
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// A declaration of a function template shall be in scope at the point of the
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// explicit instantiation of the function template.
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template<typename T> void f0(T);
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template void f0(int); // okay
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template<typename T> void f0(T) { }
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// A definition of the class or class template containing a member function
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// template shall be in scope at the point of the explicit instantiation of
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// the member function template.
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struct X0; // expected-note {{forward declaration}}
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template<typename> struct X1; // expected-note 5{{declared here}}
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template void X0::f0<int>(int); // expected-error {{incomplete type}}
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template void X1<int>::f0<int>(int); // expected-error {{implicit instantiation of undefined template}}
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// A definition of a class template or class member template shall be in scope
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// at the point of the explicit instantiation of the class template or class
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// member template.
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template struct X1<float>; // expected-error{{explicit instantiation of undefined template}}
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template<typename T>
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struct X2 { // expected-note 4{{refers here}}
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template<typename U>
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struct Inner; // expected-note{{declared here}}
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struct InnerClass; // expected-note{{forward declaration}}
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};
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template struct X2<int>::Inner<float>; // expected-error{{explicit instantiation of undefined template}}
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// A definition of a class template shall be in scope at the point of an
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// explicit instantiation of a member function or a static data member of the
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// class template.
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template void X1<int>::f1(int); // expected-error {{undefined template}}
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template void X1<int>::f1<int>(int); // expected-error {{undefined template}}
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template int X1<int>::member; // expected-error {{undefined template}}
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// A definition of a member class of a class template shall be in scope at the
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// point of an explicit instantiation of the member class.
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template struct X2<float>::InnerClass; // expected-error{{undefined member}}
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// If the declaration of the explicit instantiation names an implicitly-declared
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// special member function (Clause 12), the program is ill-formed.
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template X2<int>::X2(); // expected-error{{not an instantiation}}
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template X2<int>::X2(const X2&); // expected-error{{not an instantiation}}
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template X2<int>::~X2(); // expected-error{{not an instantiation}}
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template X2<int> &X2<int>::operator=(const X2<int>&); // expected-error{{not an instantiation}}
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// A definition of a class template is sufficient to explicitly
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// instantiate a member of the class template which itself is not yet defined.
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namespace PR7979 {
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template <typename T> struct S {
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void f();
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static void g();
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static int i;
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struct S2 {
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void h();
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};
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};
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template void S<int>::f();
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template void S<int>::g();
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template int S<int>::i;
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template void S<int>::S2::h();
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template <typename T> void S<T>::f() {}
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template <typename T> void S<T>::g() {}
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template <typename T> int S<T>::i;
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template <typename T> void S<T>::S2::h() {}
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}
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namespace PR11599 {
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template <typename STRING_TYPE> class BasicStringPiece; // expected-note {{template is declared here}}
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extern template class BasicStringPiece<int>; // expected-error{{explicit instantiation of undefined template 'PR11599::BasicStringPiece<int>}}
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template class BasicStringPiece<int>;
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}
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