[notes]
During a global follow operation, we still collect semantic
predicates as long as they are not dependent on local context

[type]
Parser

[grammar]
grammar T;
@parser::members {
<Declare_pred()>
}
s : e {<True():Invoke_pred()>}? {<writeln("\"parse\"")>} '!' ;
t : e {<False():Invoke_pred()>}? ID ;
e : ID | ; // non-LL(1) so we use ATN
ID : 'a'..'z'+ ;
INT : '0'..'9'+;
WS : (' '|'\n') -> skip ;

[start]
s

[input]
a!

[output]
eval=true
parse