postfix-expression ( expression-list )
template<class T> struct X : B<T> {
typename T::A* pa;
void f(B<T>* pb) {
static int i = B<T>::i;
pb->j++;
}
};
typedef double A;
template<class T> class B {
typedef int A;
};
template<class T> struct X : B<T> {
A a; // a has type double
};
struct A {
struct B { /* ... */ };
int a;
int Y;
};
int a;
template<class T> struct Y : T {
struct B { /* ... */ };
B b; // The B defined in Y
void f(int i) { a = i; } // ::a
Y* p; // Y<T>
};
Y<A> ya;
template <class T> class A {
A* p1; // A is the current instantiation
A<T>* p2; // A<T> is the current instantiation
A<T*> p3; // A<T*> is not the current instantiation
::A<T>* p4; // ::A<T> is the current instantiation
class B {
B* p1; // B is the current instantiation
A<T>::B* p2; // A<T>::B is the current instantiation
typename A<T*>::B* p3; // A<T*>::B is not the current instantiation
};
};
template <class T> class A<T*> {
A<T*>* p1; // A<T*> is the current instantiation
A<T>* p2; // A<T> is not the current instantiation
};
template <class T1, class T2, int I> struct B {
B<T1, T2, I>* b1; // refers to the current instantiation
B<T2, T1, I>* b2; // not the current instantiation
typedef T1 my_T1;
static const int my_I = I;
static const int my_I2 = I+0;
static const int my_I3 = my_I;
B<my_T1, T2, my_I>* b3; // refers to the current instantiation
B<my_T1, T2, my_I2>* b4; // not the current instantiation
B<my_T1, T2, my_I3>* b5; // refers to the current instantiation
}; — end example
template<class T> struct A {
typedef int M;
struct B {
typedef void M;
struct C;
};
};
template<class T> struct A<T>::B::C : A<T> {
M m; // OK, A<T>::M
}; — end example
template <class T> class A {
static const int i = 5;
int n1[i]; // i refers to a member of the current instantiation
int n2[A::i]; // A::i refers to a member of the current instantiation
int n3[A<T>::i]; // A<T>::i refers to a member of the current instantiation
int f();
};
template <class T> int A<T>::f() {
return i; // i refers to a member of the current instantiation
} — end example
template<class T> class A {
typedef int type;
void f() {
A<T>::type i; // OK: refers to a member of the current instantiation
typename A<T>::other j; // error: neither a member of the current instantiation nor
// a member of an unknown specialization
}
}; — end example
struct A {
int m;
};
struct B {
int m;
};
template<typename T>
struct C : A, T {
int f() { return this->m; } // finds A::m in the template definition context
int g() { return m; } // finds A::m in the template definition context
};
template int C<B>::f(); // error: finds both A::m and B::m
template int C<B>::g(); // OK: transformation to class member access syntax
// does not occur in the template definition context; see [class.mfct.non-static]
— end examplesimple-type-specifier ( expression-list ) :: new new-placement new-type-id new-initializer :: new new-placement ( type-id ) new-initializer dynamic_cast < type-id > ( expression ) static_cast < type-id > ( expression ) const_cast < type-id > ( expression ) reinterpret_cast < type-id > ( expression ) ( type-id ) cast-expression
literal postfix-expression . pseudo-destructor-name postfix-expression -> pseudo-destructor-name sizeof unary-expression sizeof ( type-id ) sizeof ... ( identifier ) alignof ( type-id ) typeid ( expression ) typeid ( type-id ) :: delete cast-expression :: delete [ ] cast-expression throw assignment-expression noexcept ( expression )
sizeof unary-expression sizeof ( type-id ) typeid ( expression ) typeid ( type-id ) alignof ( type-id ) noexcept ( expression )
simple-type-specifier ( expression-list ) static_cast < type-id > ( expression ) const_cast < type-id > ( expression ) reinterpret_cast < type-id > ( expression ) ( type-id ) cast-expression