Query

[Naren]

Hello All,
Does C++ have only have RTTI i.e. only identification?.Is there any way
that objects can be created knowing the name of the class as string during
run-time?

Thanks in advance.

Regards,
Naren

 

[Patrik Stellmann]

Hello All,
Does C++ have only have RTTI i.e. only identification?.

Don't understand your question...
Is there any way

that objects can be created knowing the name of the class as string during
run-time?

You can do somthing like that using a map to get the pointer to a
create-function for a specific string while the string could be the
value of type_info::name(). Unfortunately the value of type_info::name()
is - as far as i know - not specified in the standard but at least all
MS-VC compilers return the full class name (with napespace) here. The
return value of the create function could be either a void* (not
recommended) or a pointer to the base class of all classes you want to
be able to create with this concept...

 

[Karl Heinz Buchegger]

Hello All,
Does C++ have only have RTTI i.e. only identification?.Is there any way
that objects can be created knowing the name of the class as string during
run-time?

Search your literature (or the web) for 'Factory pattern'

 

[Rolf Magnus]

You can do somthing like that using a map to get the pointer to a
create-function for a specific string while the string could be the
value of type_info::name(). Unfortunately the value of
type_info::name() is - as far as i know - not specified in the
standard

And further, it doesn't even need to be unique.

but at least all MS-VC compilers return the full class name
(with napespace) here.

g++ returns the string that would be used in name mangling if it were
e.g. the type of a funciton parameter.