Hello,
I'm trying to implement something like gmail-search where the user can
enter key:word or key:"more than one word" -> where the multiple words
are enclosed in double quotes (would like to remove that constraint if
possible, but I don't know enough of ANTLR to do that yet)
So far I have the following which correctly matches `description:"something"`:
grammar Search;
options {
language=Python;
}
main
: k=WORD ':' v=PHRASE { print $k.text, '=', $v.text }
;
PHRASE
: '"' WORD '"' { $text = $WORD.text }
;
WORD
: ( 'a'..'z' | 'A'..'Z' | '.' )+
;
WHITESPACE
: (' '|'\t'|'\n'|'\r')+ { self.skip() }
;
The problem is that I'm unable to proceed from here. If I put
PHRASE
: '"' w=WORD+ '"' { $text = $w.text }
;
Then I get the following error:
ANTLR Parser Generator Version 3.1.1
line 1:22 mismatched character u' ' expecting u'"'
line 1:28 required (...)+ loop did not match anything at character '<EOF>'
line 1:23 missing PHRASE at u'todo'
description = <missing PHRASE>
I am not sure how to match a phrase as multiple words.
Any help would be greatly appreciated. Please be gentle on a newbie :-)
Regards,
Swaroop
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