Hello,
I tried to use the "Refactor" -> "Remove left recursion" function but
couldn't get it to work. When generating the parser ANTLR detects the
left recursion. But when I place the cursor on the offending symbol and
try to start the "Remove left recursion" function it says "The rule
doesn't have a left recursion.".
Also ANTLR spits out the following exception in the console whenever it
detects a left recursion while generating a grammar:
java.lang.ClassCastException: org.antlr.tool.Rule cannot be cast to
java.lang.String
at
org.antlr.works.grammar.antlr.ANTLRGrammarEngineImpl.markLeftRecursiveRules(Unknown
Source)
at
org.antlr.works.grammar.antlr.ANTLRGrammarEngineImpl.analyze(Unknown Source)
at org.antlr.works.grammar.engine.GrammarEngineImpl.analyze(Unknown
Source)
at org.antlr.works.grammar.CheckGrammar.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
I'm not sure if this has anything to do with the "Remove left recursion"
function not working.
These problems seem to happen with every grammar that has a left recursion.
Max
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