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