||Runtime type identification operator
postfix-expr := typeid ( expression ) | typeid ( type-id )
The typeid operator returns a
const reference to a type_info
object that describes type-id or the type of
expression. If expression
is an lvalue (not a pointer) of a polymorphic class, the
type_info of the most-derived class is returned.
Otherwise, expression is not evaluated, and the
type_info of its static type is returned.
Each distinct type has its own associated
type_info object, but type synonyms (such as those
created with typedef) have the same
void debug(const T& obj)
std::clog << typeid(obj).name( ) << ':' << &obj << '\n';
expression, typedef, Chapter 3, <typeinfo>