[Rock-dev] orocos.rb accessing complex task properties

[Alexander Duda]

If you are trying to access a task property which is a struct or class
orocos.rb is not very transparent.

task.property.x = 123	# is not working

#you have to do it this way
prop = task.property
prop.x = 123
task.property = prop

This is because task.property is creating a new object
and .x= is modifying it but it is not written back to the task.
As far as I know there is no nice solution for it because of corba.

Therefore I would suggest to block calls like
task.property if the property is a class or a struct

task.property.x = 123 
should result in
"Warning: Use task.read(x) to access complex properties"

task.property2 = 123   #should still work

Otherwise nearly all new user will run into it.

Thoughts?

Alex


-- 
Dipl.-Ing. Alexander Duda 
Unterwasserrobotik

DFKI Bremen
Robotics Innovation Center
Robert-Hooke-Straße 5
28359 Bremen, Germany

Phone: +49 (0)421 178-456620
Fax:   +49 (0)421 178-454150
E-Mail: alexander.duda at dfki.de

Weitere Informationen: http://www.dfki.de/robotik
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