[antlr-interest] Help Needed on throwing exceptions

[Srikantham, Anil]

Hi,

I'm currently working on a compiler for IEC 61131 languages.
I'm using ANTLR 2.7.2 and things look fine till now.
But I see a problem when I throw explicitly an exception based on a
condition in the parser. 

I use a default try-catch block and the catch block has a function
consumeUntil which consumes some tokens when this exception is raised.

To negate this I used mark and rewind.

Can there be a better solution??? Or is it a problem with this version of
ANTLR.

function_call! {int funcNameMark = 0; } :

r2:function_name  LEFT_PAREN! p2:param_value_list { funcNameMark = mark(); }
RIGHT_PAREN!
		{ 

//-----this is the exception that I throw -----
			if(gPositionalParamsCnt != 0 &&  gNamedParamsCnt !=
0)
			{
				gPositionalParamsCnt = 0;
				gNamedParamsCnt = 0;
				rewind(funcNameMark);
				throw new RecognitionException( "Function
call to " + r2_AST.ToString() + " has both positional and named arguments");

			}

			#function_call = #(#[FUNCTION_CALL,"FUNCTION_CALL"],
r2, p2 ); 
			
		}


Thanks --- Anil




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