@mike-lischke/antlr-tgen/resources/descriptors/ParseTrees/TwoAlts.txt

A generator for antlr-ng runtime test cases

[type]
Parser

[grammar]
grammar T;
s
@init {
<BuildParseTrees()>
}
@after {
<ToStringTree("$r.ctx"):writeln()>
}
  : r=a ;
a : 'x' | 'y'
  ;

[start]
s

[input]
y

[output]
"""(a y)
"""