(RTTI) , , . RTTI typeid type_info. Typeinfo typeinfo.
typeid:
typeid ()
typeid ()
type_info, . , bad_typeid.
, (.. type_info , ).
, , type_info , , .
typeid , .
type_info typeinfo.h :
class type_info{
public:
virtual ~ type_info();
bool operator == (const type_info& rhs) const;
bool operator!= (const type_info& rhs) const;
bool before (const type_info& rhs) const;
const char* name () const;
private:
type_info (const type_info& rhs);
type_info& operator = (const type_info& rhs);
};
name , , type_info.
type_info .
private, .
== ! = , before . :
typeid(Tl).before(typeid(T2))
1 2, .
, , , .
:
#include <typeinfo.h>
class {...
public: virtual ~(){...};
};
class : public {...
public: virtual void some_method(){... };
};
void demo (B* ){
if (typeid(*p) == typeid(C))
dynamic_cast<C*>(p)->some_method();
}
int main(){
C* = new C;
demo(c);
return 0;
}
:
void print_type (some_obj *){
cout << type_id(*p).name();
}
typeid , .
|
|
|
:
1. .. /++. . .: , 2006. 464 .:.
2. .. ++ . 4- . .: , 2005. 890 .: .
3. .., .. : .. 2- . . .: , 2005. 600 .: .
4. .., .. /++. : . .: , 2007. 265 .: .
5. .., .. ++. - : . .: , 2007. 239 .: .
:
1. .. ++ Builder 6. 7- . .: , 2010. 1152 ., .
2. . ++. .: , 2011. 371 .: .
3. ., ., . .: . . .: , 2010. 400 .: .
4. . ++. / //. . . .: , 2002. 688 .: .
5. .. ++. . .: -, 2006. 384 .: .
6. .. /++ . .: -, 2006. 288 .: .
:
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