JavaScript target can't use wildcards

[dabbler0]

The JavaScript target compiles . to matchWildcard() instead of this.matchWildcard(), which raises an error. Manually changing to this.matchWildcard() in the generated source seems to fix the problem.

[ericvergnaud]

Hi,
can you provide a grammar sample to reproduce this?
Eric

[nodayoshikazu]

Hi,
I am experiencing the same issue. Attached is a grammar snippet to reproduce this. Thanks.
-Yoshi
m.txt

[parrt]

/*  makefile parser grammar   */

grammar m;


root:
       (command)+ EOF
;

command:
    BackSlash? ( ID | Id_or_dir )
  | BackTick ( (.)+? ) BackTick
;

NL:
    ( '\r' '\n'? | '\n' )
;

At: '@' ;
BackTick: '`' ;
Slash: '/' ;
BackSlash: '\\' ;
Vert: '|' ;
LeftAngle: '<' ;
RightAngle: '>' ;
OpenParen: '(' ;
CloseParen: ')' ;
OpenBrace: '{' ;
CloseBrace: '}' ;
DoubleQuote: '"' ;
SingleQuote: '\'' ;

Equal: '=' ;
BangEqual: '!=' ;
QuestionEqual: '?=' ;
ColonEqual: ':=' ;
ColcolEqual: '::=' ;
PlusEqual: '+=' ;

Tab: '\t' ;
AndAnd: '&&' ;
OrOr: '||' ;

Value:	Digit+ ;


StrLiteral:  SingleQuote Id_or_dir SingleQuote
            | DoubleQuote ~["]+ DoubleQuote
;

Id_or_dir: ID ( '/' ID? )*
	  | ( '../' | './' | '/' ) ID? 
;

ID: [a-zA-Z_.~*\[] ( [\-a-zA-Z_.~*\]] | [0-9] )*  ;

fragment
Digit:
	[0-9]
;
LineComment:
	Tab* '#' ~[\r\n]* NL -> skip
;
Whitespace
    :   [ ]+ -> skip
;

NotNewline: ( ~[\r\n] ) ;

[ChristophWedler]

As a workaround, you can use the following "action" before the use of the dot:

    { var matchWildcard = this.matchWildcard.bind(this); }

But a fix in the Javascript generator would be better, of course...

[nodayoshikazu]

Thanks for the tip. Since this is an old problem and I could not wait for the new antlr release with the fix, I did my work around (added "this.") and it is working fine so far.