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Reading multi-line value in ANTLR before special character appears

How can I read multiline text in ANTLR until a special character appears. As in the text below: -

@Description("
Hi There I am.
")

I need to read it as - > @Description and value -> "Hello, I am" .

I tried this with the following grammar

KEY
 : '@' [a-zA-Z] (~[(\r\n] | '\\)')*
 ;


VALUE
 : '(' ~[\r\n]*
 ;

I have tried many variants of VALUE grammar but no luck.

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1 answer


You are probably confused by the lexer / parser separation. You only provided one example, but I can do the following:

declaration: KEY '(' STRING ')' ;
KEY : '@' [a-zA-Z]+ ;
STRING: '"' (~'"')* '"' ;
WS: [ \t\r\n] -> skip;

declaration

is the parser rule. It consists of KEY

( @

followed by letters), an open parenthesis, STRING

(any text between quotes), and a closing parenthesis. KEY

and STRING

- lexer rules.



Keep in mind that the rule STRING

above will not allow you to avoid symbols. If you need to avoid a quote with a backslash (as well as a backslash with a backslash), use the following rule instead:

STRING: '"' ('\\' ["\\] | ~'"')* '"'
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