[antlr-interest] check tokens for whitespace?

[mazypath]

Sorry if this is a newbie question but I can't seem to find an answer
in the docs or online.

Is there anyway to define a token as a string and to only have have
that string recognized as a token if it is not followed by whitespace?

For example if I define the Lexer as follows:
  class L extends Lexer;

  FUNC : "plus";
  WS : ( ' '| '\t' | '\f') { $setType(Token.SKIP); }
  VAR : ('a'..'z') ('a'..'z'|'0'..'9')*;
  ;   

Can I get the Lexer to parse the string "plus1" as a VAR token and not
a FUNC token followed by "1"?

Thanks in advance!
 












 
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