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ros2 / design

Design documentation for ROS 2.0 effort
http://design.ros2.org/
Apache License 2.0
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legacy char now maps to int in python #222

Closed mikaelarguedas closed 5 years ago

mikaelarguedas commented 5 years ago

redo of https://github.com/ros2/design/pull/221 but targeting the legacy design doc for msg.

dirk-thomas commented 5 years ago

This article starts with:

With the transition to use IDL for specifying interfaces in ROS 2 Dashing this article has been superseded by ...

So I am not sure it makes sense to update it.

mikaelarguedas commented 5 years ago

I understand your point. What prompted this initially is that crystal code setting fields of type char in messages is now failing to run on master, and I was not able to find resources explaining that it was now mapping to an int.

Is there a place discussing the support (or discontinued support) of msg in Dashing and what the generated datastructures will be like for people using msg files?

dirk-thomas commented 5 years ago

Please see https://github.com/ros2/design/pull/221#discussion_r269296677. The change basically restores compatibility to how it is being mapped in ROS 1.

mikaelarguedas commented 5 years ago

Thanks for the answer, I replied in #221 . Closing this invalid PR then