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

A generator for antlr-ng runtime test cases

[notes]
Tests predictions for the following case involving closures.
http://www.antlr.org/wiki/display/~admin/2011/12/29/Flaw+in+ANTLR+v3+LL(*)+analysis+algorithm

[type]
Parser

[grammar]
grammar T;
prog
@init {<LL_EXACT_AMBIG_DETECTION()>}
   : expr_or_assign*;
expr_or_assign
   : expr '++' {<writeln("\"fail.\"")>}
   |  expr {<AppendStr("\"pass: \"","$expr.text"):writeln()>}
   ;
expr: expr_primary ('\<-' ID)?;
expr_primary
   : '(' ID ')'
   | ID '(' ID ')'
   | ID
   ;
ID  : [a-z]+ ;

[start]
prog

[input]
a(i)<-x

[output]
"""pass: a(i)<-x
"""

[errors]
line 1:3 reportAttemptingFullContext d=3 (expr_primary), input='a(i)'
line 1:7 reportAmbiguity d=3 (expr_primary): ambigAlts={2, 3}, input='a(i)<-x'

[flags]
showDiagnosticErrors