Method which returns vector on unknown type

[pocmatos]

Hi all,

Is it possible to have a class in which a method in some cases returns
a vector<int> and on others returns vector<double>? How?

Thanks,

Paulo Matos

 

[pocmatos]

It seems I found something:
http://www.parashift.com/c++-faq-lite/templates.html#faq-35.3

 

[Zara]

Hi all,

Is it possible to have a class in which a method in some cases returns
a vector<int> and on others returns vector<double>? How?

Thanks,

Paulo Matos

You can only have such functions if there is a base class common to
all types of results. So the answer is 'No'.

 

[pocmatos]

You can only have such functions if there is a base class common to
all types of results. So the answer is 'No'.

Oh.

 

[Axter]

Hi all,

Is it possible to have a class in which a method in some cases returns
a vector<int> and on others returns vector<double>? How?

Thanks,

Paulo Matos

Either you need to have a common base class, or you need to have types
that have a common interface.

See following example for Heterogeneous Containers that can store
objects that have different base types, but have some type of common
interface (function signature).

http://code.axter.com/HeterogeneousContainer1.cpp
http://code.axter.com/HeterogeneousContainer2.cpp
http://code.axter.com/HeterogeneousContainer3.cpp

 

[Eric Pruneau]

Hi all,

Is it possible to have a class in which a method in some cases returns
a vector<int> and on others returns vector<double>? How?

Thanks,

Paulo Matos

You can use boost::any

Your method will return a vector<boost::any>
which can be .... anything!

Eric