Determining if type T is a subclass of X

[flopbucket]

Hi,

Is there a way using templates at compile time to determine if a type
T is a subclass of another type?

Basically I want to chose one struct if it is a subclass, or another
struct if it is not.

[Victor Bazarov]

flopbucket wrote:

Is there a way using templates at compile time to determine if a type
T is a subclass of another type?

Basically I want to chose one struct if it is a subclass, or another
struct if it is not.

Yes, IIRC. Check "is_derived_from" (or something like that) in Boost.

V
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[Sylvester Hesp]

flopbucket wrote :

Hi,

Is there a way using templates at compile time to determine if a type
T is a subclass of another type?

Basically I want to chose one struct if it is a subclass, or another
struct if it is not.

Yes there is, see boost::is_base_of

http://www.boost.org/doc/html/boost_...its.is_base_of

- Sylvester

[Vaibhav]

On Jun 4, 10:27 am, Sylvester Hesp <[e-mail]:

flopbucket wrote :

Hi,

Is there a way using templates at compile time to determine if a type
T is a subclass of another type?

Basically I want to chose one struct if it is a subclass, or another
struct if it is not.

Yes there is, see boost::is_base_of

http://www.boost.org/doc/html/boost_...e.html#boost_t...

- Sylvester

Is it possible to do this without using Boost library functions ???

[Andre Kostur]

Vaibhav <va***********@gmail.comwrote in news:1180967826.331580.90410
@p77g2000hsh.googlegroups.com:

On Jun 4, 10:27 am, Sylvester Hesp <[e-mail]:

>flopbucket wrote :

Hi,

Is there a way using templates at compile time to determine if a type
T is a subclass of another type?

Basically I want to chose one struct if it is a subclass, or another
struct if it is not.

Yes there is, see boost::is_base_of

http://www.boost.org/doc/html/boost_...e.html#boost_t...

- Sylvester

Is it possible to do this without using Boost library functions ???

Sure. Look at how Boost did it... do the same thing.

[vallee.aurelien]

On 4 juin, 16:14, flopbucket <[e-mail]:

Hi,

Is there a way using templates at compile time to determine if a type
T is a subclass of another type?

Basically I want to chose one struct if it is a subclass, or another
struct if it is not.

Look at "Modern C++ Design" - Alexandrescu
The whole process is explained (and used in Loki).