Hi, I am new to grammar design and I am still struggling with understanding
non LL(*) errors.
In the example below I do understand that "call f using 1, 2" is ambiguous,
which I am trying to address with the greedy option, but I still get a fatal
error trying to compile the grammar.
I am looking for general tips that would help me get from such an error
message (the actual grammar is complex and those errors keep coming up with
every change) to a specific input example where I can understand which rule
sequence would send antlr into a recursive loop?
Thanks in advance!
Franck
grammar Test;
tokens {
ON='on';
COMMA=',';
}
callExpression
: primaryExpression
| 'call' primaryExpression ( 'using' primaryExpression ( options
{greedy=true;} : COMMA primaryExpression )* )?
;
primaryExpression
: '(' callExpression ')'
| ID
;
argumentList
: callExpression ( COMMA callExpression )*
;
// $>
// LEXER
// ==========================================
ID
: ('a'..'z'|'A'..'Z'|'_') ('a'..'z'|'A'..'Z'|'0'..'9'|'_')*
;
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