[type]
Parser

[grammar]
grammar T;
s @after {<ToStringTree("$ctx"):writeln()>} : e EOF ; // must indicate EOF can follow or 'a\<EOF>' won't match
e : e '*' e
  | e '+' e
  |\<assoc=right> e '?' e ':' e
  |\<assoc=right> e '=' e
  | ID
  ;
ID : 'a'..'z'+ ;
WS : (' '|'\n') -> skip ;

[start]
s

[input]
a? b?c:d : e

[output]
"""(s (e (e a) ? (e (e b) ? (e c) : (e d)) : (e e)) <EOF>)
"""

