Hello,
I am trying to parse a simple templating language that may look like this:
"a aa [T * 2]a a"
Here, the part inside [] should be calculated (T has an integer value) and
replaced. The other part
is supposed to be left as-is. With those rules, the output should be "a aa
30a a" (when T is 15).
I want to be able to have whitespace surrounding the '*', so I am sending '
' to the hidden channel.
But that breaks the parts outside [] into pieces. Is there a way to capture
the part outside [] as-is,
with whitespace exactly like written, and the part inside [] is relaxed
where whitespace to go hidden
channel?
Daniel
Here's my grammar, btw:
parse
: (IDENT | variable)+ EOF
;
variable
: '[' mult ']'
;
// the multiplication is optional
mult
: IDENT ('*' INTEGER)?
;
fragment DIGIT : '0'..'9' ;
INTEGER : DIGIT+ ;
fragment LETTER : 'a'..'z' | 'A'..'Z';
IDENT : LETTER+ ;
WS : ' '+ { $channel = HIDDEN; } ;
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