@mike-lischke/antlr-tgen/resources/descriptors/FullContextParsing/ExprAmbiguity_2.txt

A generator for antlr-ng runtime test cases

[type]
Parser

[grammar]
grammar T;
s
@init {<LL_EXACT_AMBIG_DETECTION()>}
:   expr[0] {<ToStringTree("$expr.ctx"):writeln()>};
   expr[int _p]
       : ID
       (
  {5 >= $_p}? '*' expr[6]
  | {4 >= $_p}? '+' expr[5]
       )*
       ;
ID  : [a-zA-Z]+ ;
WS  : [ \r\n\t]+ -> skip ;

[start]
s

[input]
a+b*c

[output]
"""(expr a + (expr b * (expr c)))
"""

[errors]
line 1:1 reportAttemptingFullContext d=1 (expr), input='+'
line 1:2 reportContextSensitivity d=1 (expr), input='+b'
line 1:3 reportAttemptingFullContext d=1 (expr), input='*'
line 1:5 reportAmbiguity d=1 (expr): ambigAlts={1, 2}, input='*c'

[flags]
showDiagnosticErrors