I have read the article "http://www.antlr.org/fieldguide/whitespace/" and I have a hard time to understand the meaning of action involved

			

			( "{#call = #(#[CALL,"CALL"], #call);} ).
			

		

Thanks,
Ben

The complete parser rule is as follows:

			

			class InstrParser extends Parser;
			

			options {
			

			buildAST = true;
			

			k=2;
			

			}
			

			

			tokens {
			

			CALL // define imaginary token CALL
			

			}
			

			

			slist
			

			:   ( stat )+
			

			;
			

			

			stat:   LBRACE^ (stat)+ RBRACE
			

			|   "if"^ expr "then" stat ("else" stat)?
			

			|   ID ASSIGN^ expr SEMI
			

			|   call
			

			;
			

			

			expr
			

			:   mexpr (PLUS^ mexpr)*
			

			;
			

			

			mexpr
			

			:   atom (STAR^ atom)*
			

			;
			

			

			atom:   INT
			

			|   ID
			

			;
			

			

			call:   ID LPAREN (expr)? RPAREN SEMI
			

			{#call = #(#[CALL,"CALL"], #call);}
			

			^^^ This is line I don't understand.
			

			;