In grako one can use the following name:e to add the result of e to the AST using name as key. For example
var_def
=
var+:ID {',' var+:ID}*
What would be a good translation of this to Xtext? I tried
var_def:
var=ID (',' var=ID)*;
which is not failing, but is raising the following warning
Multiple markers at this line
- The possibly assigned value of feature 'var' may be overridden
by subsequent assignments.
- This assignment will override the possibly assigned value of
feature 'var'.
I think I am trying to mimic the name behavior, but do not have much success.
With your solution only the last ID will be available in the AST. I assume var should be a multi-valued feature holding all IDs, not only the last one. This can be expressed as
var_def:
var+=ID (',' var+=ID)*;
In the resulting AST var is a list of IDs.