| // RUN: %clang_cc1 -fsyntax-only -verify %s |
| // RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s |
| // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s |
| |
| |
| // This test creates cases where implicit instantiations of various entities |
| // would cause a diagnostic, but provides expliict specializations for those |
| // entities that avoid the diagnostic. The specializations are alternately |
| // declarations and definitions, and the intent of this test is to verify |
| // that we allow specializations only in the appropriate namespaces (and |
| // nowhere else). |
| struct NonDefaultConstructible { |
| NonDefaultConstructible(int); |
| }; |
| |
| |
| // C++ [temp.expl.spec]p1: |
| // An explicit specialization of any of the following: |
| |
| // -- function template |
| namespace N0 { |
| template<typename T> void f0(T) { |
| T t; |
| } |
| |
| template<> void f0(NonDefaultConstructible) { } |
| |
| void test_f0(NonDefaultConstructible NDC) { |
| f0(NDC); |
| } |
| |
| template<> void f0(int); |
| template<> void f0(long); |
| } |
| |
| template<> void N0::f0(int) { } // okay |
| |
| namespace N1 { |
| template<> void N0::f0(long) { } // expected-error{{does not enclose namespace}} |
| } |
| |
| template<> void N0::f0(double); |
| |
| template<> void N0::f0(double) { } |
| |
| struct X1 { |
| template<typename T> void f(T); |
| |
| template<> void f(int); |
| }; |
| |
| // -- class template |
| namespace N0 { |
| |
| template<typename T> |
| struct X0 { // expected-note {{explicitly specialized declaration is here}} |
| static T member; |
| |
| void f1(T t) { |
| t = 17; |
| } |
| |
| struct Inner : public T { }; // expected-note 2{{explicitly specialized declaration is here}} |
| |
| template<typename U> |
| struct InnerTemplate : public T { }; // expected-note {{explicitly specialized declaration is here}} |
| // expected-error@-1 {{base specifier must name a class}} |
| |
| template<typename U> |
| void ft1(T t, U u); |
| }; |
| |
| } |
| |
| template<typename T> |
| template<typename U> |
| void N0::X0<T>::ft1(T t, U u) { |
| t = u; |
| } |
| |
| template<typename T> T N0::X0<T>::member; |
| |
| template<> struct N0::X0<void> { }; |
| N0::X0<void> test_X0; |
| |
| namespace N1 { |
| template<> struct N0::X0<const void> { }; // expected-error{{not in a namespace enclosing 'N0'}} |
| } |
| |
| namespace N0 { |
| template<> struct X0<volatile void>; |
| } |
| |
| template<> struct N0::X0<volatile void> { |
| void f1(void *); |
| }; |
| |
| // -- member function of a class template |
| template<> void N0::X0<void*>::f1(void *) { } |
| |
| void test_spec(N0::X0<void*> xvp, void *vp) { |
| xvp.f1(vp); |
| } |
| |
| namespace N0 { |
| template<> void X0<volatile void>::f1(void *) { } // expected-error{{no function template matches}} |
| |
| template<> void X0<const volatile void*>::f1(const volatile void*); |
| } |
| |
| void test_x0_cvvoid(N0::X0<const volatile void*> x0, const volatile void *cvp) { |
| x0.f1(cvp); // okay: we've explicitly specialized |
| } |
| |
| // -- static data member of a class template |
| namespace N0 { |
| // This actually tests p15; the following is a declaration, not a definition. |
| template<> |
| NonDefaultConstructible X0<NonDefaultConstructible>::member; |
| |
| template<> long X0<long>::member = 17; |
| |
| template<> float X0<float>::member; |
| |
| template<> double X0<double>::member; |
| } |
| |
| NonDefaultConstructible &get_static_member() { |
| return N0::X0<NonDefaultConstructible>::member; |
| } |
| |
| template<> int N0::X0<int>::member; |
| |
| template<> float N0::X0<float>::member = 3.14f; |
| |
| namespace N1 { |
| template<> double N0::X0<double>::member = 3.14; // expected-error{{does not enclose namespace}} |
| } |
| |
| // -- member class of a class template |
| namespace N0 { |
| |
| template<> |
| struct X0<void*>::Inner { }; |
| |
| template<> |
| struct X0<int>::Inner { }; |
| |
| template<> |
| struct X0<unsigned>::Inner; |
| |
| template<> |
| struct X0<float>::Inner; |
| |
| template<> |
| struct X0<double>::Inner; // expected-note{{forward declaration}} |
| } |
| |
| template<> |
| struct N0::X0<long>::Inner { }; |
| |
| template<> |
| struct N0::X0<float>::Inner { }; |
| |
| namespace N1 { |
| template<> |
| struct N0::X0<unsigned>::Inner { }; // expected-error{{member class specialization}} |
| |
| template<> |
| struct N0::X0<unsigned long>::Inner { }; // expected-error{{member class specialization}} |
| }; |
| |
| N0::X0<void*>::Inner inner0; |
| N0::X0<int>::Inner inner1; |
| N0::X0<long>::Inner inner2; |
| N0::X0<float>::Inner inner3; |
| N0::X0<double>::Inner inner4; // expected-error{{incomplete}} |
| |
| // -- member class template of a class template |
| namespace N0 { |
| template<> |
| template<> |
| struct X0<void*>::InnerTemplate<int> { }; |
| |
| template<> template<> |
| struct X0<int>::InnerTemplate<int>; // expected-note{{forward declaration}} |
| |
| template<> template<> |
| struct X0<int>::InnerTemplate<long>; |
| |
| template<> template<> |
| struct X0<int>::InnerTemplate<double>; |
| } |
| |
| template<> template<> |
| struct N0::X0<int>::InnerTemplate<long> { }; // okay |
| |
| template<> template<> |
| struct N0::X0<int>::InnerTemplate<float> { }; |
| |
| namespace N1 { |
| template<> template<> |
| struct N0::X0<int>::InnerTemplate<double> { }; // expected-error{{enclosing}} |
| } |
| |
| N0::X0<void*>::InnerTemplate<int> inner_template0; |
| N0::X0<int>::InnerTemplate<int> inner_template1; // expected-error{{incomplete}} |
| N0::X0<int>::InnerTemplate<long> inner_template2; |
| N0::X0<int>::InnerTemplate<unsigned long> inner_template3; // expected-note{{instantiation}} |
| |
| // -- member function template of a class template |
| namespace N0 { |
| template<> |
| template<> |
| void X0<void*>::ft1(void*, const void*) { } |
| |
| template<> template<> |
| void X0<void*>::ft1(void *, int); |
| |
| template<> template<> |
| void X0<void*>::ft1(void *, unsigned); |
| |
| template<> template<> |
| void X0<void*>::ft1(void *, long); |
| } |
| |
| template<> template<> |
| void N0::X0<void*>::ft1(void *, unsigned) { } // okay |
| |
| template<> template<> |
| void N0::X0<void*>::ft1(void *, float) { } |
| |
| namespace N1 { |
| template<> template<> |
| void N0::X0<void*>::ft1(void *, long) { } // expected-error{{does not enclose namespace}} |
| } |
| |
| |
| void test_func_template(N0::X0<void *> xvp, void *vp, const void *cvp, |
| int i, unsigned u) { |
| xvp.ft1(vp, cvp); |
| xvp.ft1(vp, i); |
| xvp.ft1(vp, u); |
| } |
| |
| namespace PR8979 { |
| template<typename Z> |
| struct X0 { |
| template <class T, class U> class Inner; |
| struct OtherInner; |
| template<typename T, typename U> void f(Inner<T, U>&); |
| |
| typedef Inner<OtherInner, OtherInner> MyInner; |
| template<> void f(MyInner&); |
| }; |
| } |