[antlr-interest] ANTLR Grammar Operator Precedences

Randall R Schulz rschulz at sonic.net
Sun Nov 12 20:46:56 PST 2006


Hi,

On Sunday 12 November 2006 20:09, you wrote:
> On 13. Nov 2006, at 5:03 , Randall R Schulz wrote:
> > Is the precedence of the operators in ANTLR v3.0's grammar
> > documented somewhere? I couldn't find anything on the Wiki.
>
> no, there isn't a list, unfortunately.
> if you suspect a parser error to be responsible, consider running
> ANTLR with
> java org.antlr.Tool -Xgrtree yougrammar.g

On what basis would I suspect an error when I don't know what's the 
correct behavior?


> that will print out the grammar AST. it could be huge, but at the
> moment this
> is the single most helpful tool we have.

Surely someone knows what the relative priority of the concatenation, 
alternation and closure operators are, no? It seems kind of important.


> -k


Randall Schulz


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