[antlr-interest] How to intervene automatic keywords generation

Fan Yang yhhf_dy at yahoo.com
Wed Oct 16 14:16:57 PDT 2002


According to the manual of ANTLR about Keywords and literals: any 
double-quoted string used in a parser is automatically entered into 
the literals table of the associated lexer. For instance,

   : "on" "error" "goto" label)

So "on", "error" and "goto" will be automatically putted into the 
literals table. But in my target language "error" is not a keyword. 
so "error" can be an "identifier" in a statement as following pseudo 
code line shows. 

  printf("%s", e.error)

In fact, this line will cause a problem. because the parser will look 
for the identifier -"error" in the literals table first, then 
treat "error" as keyword not an general identifier. 

  options {testLiterals=true;}
  :	('a'..'z'|'_') ('a'..'z'|'_'|'0'..'9')*	

My question is that may I determine which one ,double-quoted strings, 
can be entered into literals table instead of automatically 
generatation. Or there is an alternative way to deal with this kind 
of problem




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