Using C / C++ keywords as package name / field names results into compilation error

[firesurfer]

I realised today that using C++ keywords as fieldnames results into a compilation error.
Example:

bool delete false

Will result into:

rosidl_generator_cpp/iboss_msgs/msg/request_stored_data__struct.hpp:90:16: error: expected member name or ';' after declaration specifiers
  _delete_type delete;

It would be great if either the message generator would throw an error like: Don't use c++ keywords or
the message generator would somehow escape these fields.
If this is not a viable solution for you I think a hint in the documentation would be useful:
https://github.com/ros2/ros2/wiki/About-ROS-Interfaces

[dirk-thomas]

the message generator would somehow escape these fields.

Absolutely, that is what should happen in each language message generator specific to the keywords in that language.

Related to #118.

[firesurfer]

Just for information: I did a short search and apparently it isn't possible in C++ to escape keywords. The usage of keywords as identifiers is forbidden.

[dirk-thomas]

it isn't possible in C++ to escape keywords

I am not sure I understand your comment. If the delete field would result in a C++ member delete_ it doesn't collide with the keyword anymore. This step is commonly called "mangling" but I assumed what is what you referred to as "escaping".

[firesurfer]

I thought of escaping in the way of doing something like int @class = 0 what would be possible in C#.
Changing a field named delete to delete_ would work of course in C++.

[tfoote]

I've started an design article on this topic at: ros2/design#172

[firesurfer]

I guess this can be closed @dirk-thomas