[antlr-interest] ANTLR could not analyze...
Steve Bennett
stevagewp at gmail.com
Sat Feb 16 06:22:27 PST 2008
[01:19:04] warning(205): mediawiki11intransit.g:302:4: ANTLR could not
analyze this decision in rule table_line; often this is because of
recursive rule references visible from the left edge of alternatives.
ANTLR will re-analyze the decision with a fixed lookahead of k=1.
Consider using "options {k=1;}" for that decision and possibly adding
a syntactic predicate.
What does this warning mean? What can I do about it?
table_line
options { k= 1; }
:
(
(PIPE PLUS) => table_caption
| (PIPE HYPHEN) => table_row_separator
| (EXCLAMATION) => table_header_cells
| (PIPE ~RIGHT_BRACE) => table_data_cells
);
As you can see, I'm using options k=1, and no shortage of syntactic
predicates - what else can I do?
Aside question: What exactly is the scope of options? Does setting an
option on a rule carry through to rules referred to in that rule?
Steve
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