@mike-lischke/antlr-tgen/resources/descriptors/SemPredEvalParser/TwoUnpredicatedAltsAndOneOrthogonalAlt.txt

A generator for antlr-ng runtime test cases

[type]
Parser

[grammar]
grammar T;
s : {<LL_EXACT_AMBIG_DETECTION()>} a ';' a ';' a;
a : INT {<writeln("\"alt 1\"")>}
  | ID {<writeln("\"alt 2\"")>} // must pick this one for ID since pred is false
  | ID {<writeln("\"alt 3\"")>}
  | {<False()>}? ID {<writeln("\"alt 4\"")>}
  ;
ID : 'a'..'z'+ ;
INT : '0'..'9'+;
WS : (' '|'\n') -> skip ;

[start]
s

[input]
34; x; y

[output]
alt 1
alt 2
alt 2

[errors]
line 1:4 reportAttemptingFullContext d=0 (a), input='x'
line 1:4 reportAmbiguity d=0 (a): ambigAlts={2, 3}, input='x'
line 1:7 reportAttemptingFullContext d=0 (a), input='y'
line 1:7 reportAmbiguity d=0 (a): ambigAlts={2, 3}, input='y'

[flags]
showDiagnosticErrors