// RUN: %clang_cc1 -triple %itanium_abi_triple -std=c++98 -verify -fsyntax-only %s -Wno-c++11-extensions -Wno-c++1y-extensions -DPRECXX11
// RUN: %clang_cc1 -triple %itanium_abi_triple -std=c++11 -verify -fsyntax-only -Wno-c++1y-extensions %s
// RUN: %clang_cc1 -triple %itanium_abi_triple -std=c++1y -verify -fsyntax-only %s -DCPP1Y
#define CONST const
#ifdef PRECXX11
#define static_assert _Static_assert
#endif
class A {
template<typename T> CONST T wrong; // expected-error {{non-static data member 'wrong' cannot be declared as a template}}
template<typename T> CONST T wrong_init = 5; // expected-error {{non-static data member 'wrong_init' cannot be declared as a template}}
template<typename T, typename T0> static CONST T right = T(100);
template<typename T> static CONST T right<T,int> = 5;
template<typename T> CONST int right<int,T>; // expected-error {{non-static data member 'right' cannot be declared as a template}}
template<typename T> CONST float right<float,T> = 5; // expected-error {{non-static data member 'right' cannot be declared as a template}}
#ifdef PRECXX11
// expected-warning@-2 {{in-class initializer for static data member of type 'const float' is a GNU extension}}
#else
// expected-error@-4 {{in-class initializer for static data member of type 'const float' requires 'constexpr' specifier}}
// expected-note@-5 {{add 'constexpr'}}
#endif
template<> CONST int right<int,int> = 7;
template<> CONST float right<float,int>;
template static CONST int right<int,int>; // expected-error {{expected '<' after 'template'}}
};
namespace out_of_line {
class B0 {
template<typename T, typename T0> static CONST T right = T(100);
template<typename T> static CONST T right<T,int> = T(5);
};
template<> CONST int B0::right<int,int> = 7; // expected-note {{previous}}
template CONST int B0::right<int,int>; // expected-warning {{has no effect}}
template<> CONST int B0::right<int,float>; // expected-note {{previous}}
template CONST int B0::right<int,float>; // expected-warning {{has no effect}}
class B1 {
template<typename T, typename T0> static CONST T right;
template<typename T> static CONST T right<T,int>;
};
template<typename T, typename T0> CONST T B1::right = T(100);
template<typename T> CONST T B1::right<T,int> = T(5);
class B2 {
template<typename T, typename T0> static CONST T right = T(100); // expected-note {{previous initialization is here}}
template<typename T> static CONST T right<T,int> = T(5); // expected-note {{previous initialization is here}}
};
template<typename T, typename T0> CONST T B2::right = T(100); // expected-error {{static data member 'right' already has an initializer}}
template<typename T> CONST T B2::right<T,int> = T(5); // expected-error {{static data member 'right' already has an initializer}}
class B3 {
template<typename T, typename T0> static CONST T right = T(100);
template<typename T> static CONST T right<T,int> = T(5);
};
template<typename T, typename T0> CONST T B3::right;
template<typename T> CONST T B3::right<T,int>;
class B4 {
template<typename T, typename T0> static CONST T a;
template<typename T> static CONST T a<T,int> = T(100);
template<typename T, typename T0> static CONST T b = T(100);
template<typename T> static CONST T b<T,int>;
};
template<typename T, typename T0> CONST T B4::a; // expected-error {{default initialization of an object of const type 'const int'}}
template<typename T> CONST T B4::a<T,int>;
template CONST int B4::a<int,char>; // expected-note {{in instantiation of}}
template CONST int B4::a<int,int>;
template<typename T, typename T0> CONST T B4::b;
template<typename T> CONST T B4::b<T,int>; // expected-error {{default initialization of an object of const type 'const int'}}
template CONST int B4::b<int,char>;
template CONST int B4::b<int,int>; // expected-note {{in instantiation of}}
}
namespace non_const_init {
class A {
template<typename T> static T wrong_inst_undefined = T(10); // expected-note {{refers here}}
template<typename T> static T wrong_inst_defined = T(10); // expected-error {{non-const static data member must be initialized out of line}}
template<typename T> static T wrong_inst_out_of_line;
};
template const int A::wrong_inst_undefined<const int>; // expected-error {{undefined}}
template<typename T> T A::wrong_inst_defined;
template const int A::wrong_inst_defined<const int>;
template int A::wrong_inst_defined<int>; // expected-note {{in instantiation of static data member 'non_const_init::A::wrong_inst_defined<int>' requested here}}
template<typename T> T A::wrong_inst_out_of_line = T(10);
template int A::wrong_inst_out_of_line<int>;
class B {
template<typename T> static T wrong_inst; // expected-note {{refers here}}
template<typename T> static T wrong_inst<T*> = T(100); // expected-error {{non-const static data member must be initialized out of line}} expected-note {{refers here}}
template<typename T> static T wrong_inst_fixed;
template<typename T> static T wrong_inst_fixed<T*>;
};
template int B::wrong_inst<int>; // expected-error {{undefined}}
// FIXME: It'd be better to produce the 'explicit instantiation of undefined
// template' diagnostic here, not the 'must be initialized out of line'
// diagnostic.
template int B::wrong_inst<int*>; // expected-note {{in instantiation of static data member 'non_const_init::B::wrong_inst<int *>' requested here}}
template const int B::wrong_inst<const int*>; // expected-error {{undefined}}
template<typename T> T B::wrong_inst_fixed = T(100);
template int B::wrong_inst_fixed<int>;
class C {
template<typename T> static CONST T right_inst = T(10); // expected-note {{here}}
template<typename T> static CONST T right_inst<T*> = T(100); // expected-note {{here}}
};
template CONST int C::right_inst<int>; // expected-error {{undefined variable template}}
template CONST int C::right_inst<int*>; // expected-error {{undefined variable template}}
namespace pointers {
struct C0 {
template<typename U> static U Data;
template<typename U> static CONST U Data<U*> = U(); // expected-note {{here}}
template<typename U> static U Data2;
template<typename U> static CONST U Data2<U*> = U();
};
const int c0_test = C0::Data<int*>;
static_assert(c0_test == 0, "");
template const int C0::Data<int*>; // expected-error {{undefined}}
template<typename U> const U C0::Data2<U*>;
template const int C0::Data2<int*>;
struct C1a {
template<typename U> static U Data;
template<typename U> static U* Data<U*>; // Okay, with out-of-line definition
};
template<typename T> T* C1a::Data<T*> = new T();
template int* C1a::Data<int*>;
struct C1b {
template<typename U> static U Data;
template<typename U> static CONST U* Data<U*>; // Okay, with out-of-line definition
};
template<typename T> CONST T* C1b::Data<T*> = (T*)(0);
template CONST int* C1b::Data<int*>;
struct C2a {
template<typename U> static int Data;
template<typename U> static U* Data<U*> = new U(); // expected-error {{non-const static data member must be initialized out of line}}
};
template int* C2a::Data<int*>; // expected-note {{in instantiation of static data member 'non_const_init::pointers::C2a::Data<int *>' requested here}}
struct C2b {
template<typename U> static int Data;
template<typename U> static U *const Data<U*> = (U*)(0); // expected-error {{static data member of type 'int *const'}}
};
template<typename U> U *const C2b::Data<U*>;
template int *const C2b::Data<int*>; // expected-note {{in instantiation of static data member 'non_const_init::pointers::C2b::Data<int *>' requested here}}
}
}
#ifndef PRECXX11
namespace constexpred {
class A {
template<typename T> constexpr T wrong; // expected-error {{non-static data member 'wrong' cannot be declared as a template}}
// expected-error@-1 {{declaration of constexpr static data member 'wrong' requires an initializer}}
template<typename T> constexpr T wrong_init = 5; // expected-error {{non-static data member 'wrong_init' cannot be declared as a template}}
template<typename T, typename T0> static constexpr T right = T(100);
template<typename T> static constexpr T right<T,int> = 5;
template<typename T> constexpr int right<int,T>; // expected-error {{non-static data member 'right' cannot be declared as a template}}
// expected-error@-1 {{declaration of constexpr static data member 'right<int, T>' requires an initializer}}
template<typename T> constexpr float right<float,T> = 5; // expected-error {{non-static data member 'right' cannot be declared as a template}}
template<> constexpr int right<int,int> = 7;
template<> constexpr float right<float, int>; // expected-error {{declaration of constexpr static data member 'right<float, int>' requires an initializer}}
template static constexpr int right<int,int>; // expected-error {{expected '<' after 'template'}}
};
}
#endif
namespace in_class_template {
template<typename T>
class D0 {
template<typename U> static U Data; // expected-note {{here}}
template<typename U> static CONST U Data<U*> = U();
};
template CONST int D0<float>::Data<int*>;
template int D0<float>::Data<int>; // expected-error {{undefined}}
template<typename T> template<typename U> const U D0<T>::Data<U*>;
template<typename T>
class D1 {
template<typename U> static U Data;
template<typename U> static U* Data<U*>;
};
template<typename T>
template<typename U> U* D1<T>::Data<U*> = (U*)(0);
template int* D1<float>::Data<int*>; // expected-note {{previous}}
template int* D1<float>::Data<int*>; // expected-error {{duplicate explicit instantiation}}
template<typename T>
class D2 {
template<typename U> static U Data;
template<typename U> static U* Data<U*>;
};
template<>
template<typename U> U* D2<float>::Data<U*> = (U*)(0) + 1;
template int* D2<float>::Data<int*>; // expected-note {{previous}}
template int* D2<float>::Data<int*>; // expected-error {{duplicate explicit instantiation}}
template<typename T>
struct D3 {
template<typename U> static CONST U Data = U(100); // expected-note {{here}}
};
static_assert(D3<float>::Data<int> == 100, "");
template const char D3<float>::Data<char>; // expected-error {{undefined}}
namespace bug_files {
template<typename T>
class D0a {
template<typename U> static U Data;
template<typename U> static CONST U Data<U*> = U(10); // expected-note {{previous declaration is here}}
};
template<>
template<typename U> U D0a<float>::Data<U*> = U(100); // expected-error {{redefinition of 'Data'}}
// FIXME: We should accept this, and the corresponding case for class
// templates.
//
// [temp.class.spec.mfunc]/2: If the primary member template is explicitly
// specialized for a given specialization of the enclosing class template,
// the partial specializations of the member template are ignored
template<typename T>
class D1 {
template<typename U> static U Data;
template<typename U> static CONST U Data<U*> = U(10); // expected-note {{previous declaration is here}}
};
template<>
template<typename U> U D1<float>::Data = U(10);
template<>
template<typename U> U D1<float>::Data<U*> = U(100); // expected-error{{redefinition of 'Data'}}
}
namespace definition_after_outer_instantiation {
template<typename A> struct S {
template<typename B> static const int V1;
template<typename B> static const int V2; // expected-note 3{{here}}
};
template struct S<int>;
template<typename A> template<typename B> const int S<A>::V1 = 123;
template<typename A> template<typename B> const int S<A>::V2<B*> = 456;
static_assert(S<int>::V1<int> == 123, "");
// FIXME: The first and third case below possibly should be accepted. We're
// not picking up partial specializations added after the primary template
// is instantiated. This is kind of implied by [temp.class.spec.mfunc]/2,
// and matches our behavior for member class templates, but it's not clear
// that this is intentional. See PR17294 and core-24030.
static_assert(S<int>::V2<int*> == 456, ""); // FIXME expected-error {{}} expected-note {{initializer of 'V2<int *>' is unknown}}
static_assert(S<int>::V2<int&> == 789, ""); // expected-error {{}} expected-note {{initializer of 'V2<int &>' is unknown}}
template<typename A> template<typename B> const int S<A>::V2<B&> = 789;
static_assert(S<int>::V2<int&> == 789, ""); // FIXME expected-error {{}} expected-note {{initializer of 'V2<int &>' is unknown}}
// All is OK if the partial specialization is declared before the implicit
// instantiation of the class template specialization.
static_assert(S<char>::V1<int> == 123, "");
static_assert(S<char>::V2<int*> == 456, "");
static_assert(S<char>::V2<int&> == 789, "");
}
namespace incomplete_array {
template<typename T> extern T var[];
template<typename T> T var[] = { 1, 2, 3 };
template<> char var<char>[] = "hello";
template<typename T> char var<T*>[] = "pointer";
static_assert(sizeof(var<int>) == 12, "");
static_assert(sizeof(var<char>) == 6, "");
static_assert(sizeof(var<void*>) == 8, "");
template<typename...> struct tuple;
template<typename T> struct A {
template<typename U> static T x[];
template<typename U> static T y[];
template<typename...U> static T y<tuple<U...> >[];
};
int *use_before_definition = A<int>::x<char>;
template<typename T> template<typename U> T A<T>::x[sizeof(U)];
static_assert(sizeof(A<int>::x<char>) == 4, "");
template<typename T> template<typename...U> T A<T>::y<tuple<U...> >[] = { U()... };
static_assert(sizeof(A<int>::y<tuple<char, char, char> >) == 12, "");
}
namespace bad_reference {
struct S {
template<typename T> static int A; // expected-note 4{{here}}
};
template<typename T> void f() {
typename T::template A<int> a; // expected-error {{template name refers to non-type template 'S::template A'}}
}
template<typename T> void g() {
T::template A<int>::B = 0; // expected-error {{template name refers to non-type template 'S::template A'}}
}
template<typename T> void h() {
class T::template A<int> c; // expected-error {{template name refers to non-type template 'S::template A'}}
}
template<typename T>
struct X : T::template A<int> {}; // expected-error {{template name refers to non-type template 'S::template A'}}
template void f<S>(); // expected-note {{in instantiation of}}
template void g<S>(); // expected-note {{in instantiation of}}
template void h<S>(); // expected-note {{in instantiation of}}
template struct X<S>; // expected-note {{in instantiation of}}
}
}
namespace in_nested_classes {
// TODO:
}
namespace bitfield {
struct S {
template <int I>
static int f : I; // expected-error {{static member 'f' cannot be a bit-field}}
};
}
namespace b20896909 {
// This used to crash.
template<typename T> struct helper {};
template<typename T> class A {
template <typename> static helper<typename T::error> x; // expected-error {{type 'int' cannot be used prior to '::' because it has no members}}
};
void test() {
A<int> ai; // expected-note {{in instantiation of}}
}
}
namespace member_access_is_ok {
#ifdef CPP1Y
namespace ns1 {
struct A {
template<class T, T N> constexpr static T Var = N;
};
static_assert(A{}.Var<int,5> == 5,"");
} // end ns1
#endif // CPP1Y
namespace ns2 {
template<class T> struct A {
template<class U, T N, U M> static T&& Var;
};
template<class T> template<class U, T N, U M> T&& A<T>::Var = T(N + M);
int *AV = &A<int>().Var<char, 5, 'A'>;
} //end ns2
} // end ns member_access_is_ok
#ifdef CPP1Y
namespace PR24473 {
struct Value
{
template<class T>
static constexpr T value = 0;
};
template<typename TValue>
struct Something
{
void foo() {
static_assert(TValue::template value<int> == 0, ""); // error
}
};
int main() {
Something<Value>{}.foo();
return 0;
}
} // end ns PR24473
#endif // CPP1Y
namespace dependent_static_var_template {
struct A {
template<int = 0> static int n; // expected-note 2{{here}}
};
int &r = A::template n; // expected-error {{use of variable template 'A::template n' requires template arguments}} expected-error {{a template argument list is expected after a name prefixed by the template keyword}}
template<typename T>
int &f() { return T::template n; } // expected-error {{use of variable template 'A::template n' requires template arguments}} expected-error {{a template argument list is expected after a name prefixed by the template keyword}}
int &s = f<A>(); // expected-note {{instantiation of}}
namespace B {
template<int = 0> static int n; // expected-note {{here}}
}
int &t = B::template n; // expected-error {{use of variable template 'B::template n' requires template arguments}} expected-error {{a template argument list is expected after a name prefixed by the template keyword}}
struct C {
template <class T> static T G;
};
template<class T> T C::G = T(6);
template <class T> T F() {
C c;
return c.G<T>;
}
int cf() { return F<int>(); }
}
#ifndef PRECXX11
namespace template_vars_in_template {
template <int> struct TakesInt {};
template <class T2>
struct S {
template <class T1>
static constexpr int v = 42;
template <class T>
void mf() {
constexpr int val = v<T>;
}
void mf2() {
constexpr int val = v<char>;
TakesInt<val> ti;
(void)ti.x; // expected-error{{no member named 'x' in 'template_vars_in_template::TakesInt<42>'}}
}
};
void useit() {
S<int> x;
x.mf<double>();
x.mf2(); // expected-note{{in instantiation of member function 'template_vars_in_template::S<int>::mf2' requested here}}
}
}
#endif
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