@mike-lischke/antlr-tgen
Version:
A generator for antlr-ng runtime test cases
27 lines (20 loc) • 296 B
Plain Text
[type]
Parser
[grammar]
grammar T;
s @after {<ToStringTree("$ctx"):writeln()>} : a ;
a : a ID {<False()>}?\<fail='custom message'>
| ID
;
ID : 'a'..'z'+ ;
WS : (' '|'\n') -> skip ;
[start]
s
[input]
x y z
[output]
"""(s (a (a x) y z))
"""
[errors]
"""line 1:4 rule a custom message
"""