c# 4.0 - How to collect errors during run time given by a parser in Antlr4 -

i have upgraded antlr 3 antlr 4. using code catch exceptions using code. not working antlr 4.

partial class xparser {     public override void reporterror(recognitionexception e)     {         base.reporterror(e);         console.writeline("error in parser @ line " + ":" + e.offendingtoken.column + e.offendingtoken.line + e.message);     } } 

this error appears

'parser.reporterror(antlr4.runtime.recognitionexception)': no suitable method found override 

in antlr 4 expected way of accumulating errors occurs in input stream. unable find way achieve on net. please provide me guidelines.

edit:

i have implemented xparser below

partial class xparser : iantlrerrorlistener<itoken> {     public void syntaxerror(irecognizer recognizer, itoken offendingsymbol, int line, int charpositioninline, string msg, recognitionexception e)     {         console.writeline("error in parser @ line " + ":" + e.offendingtoken.column + e.offendingtoken.line + e.message);     } } 

as said can extend parser class using of mentioned classes. unable register listener, in main program confused passing argument listener. please me registering.

as can see these classes has capability of producing more meaningful error messages don't they?

you need implement iantlrerrorlistener<itoken>. if want report errors have above, should focus on syntaxerror method. several base classes available if want extend one.

• consoleerrorlistener
• baseerrorlistener
• diagnosticerrorlistener

the error listener attached parser instance calling parser.adderrorlistener(listener).

edit: need create new class implements error listener interface. attach listener parser. parser not implement error listener interface.