Folks
I have a grammar A that imports B. One thing I'd like to do is to provide a
mechanism for non-default error reporting in A and B and I do this in the way
described here
http://www.antlr.org/wiki/display/ANTLR3/Error+reporting+and+recovery
Thing is, I have to plug this code
private ErrorReporter errorReporter = null;
public void setErrorReporter(ErrorReporter errorReporter) {
this.errorReporter = errorReporter;
<delegate>.setErrorReporter(errorReporter);
}
// Overrides parser/lexer emitErrorMsg
public void emitErrorMessage(String msg) {
if (errorReporter == null) {
super.emitErrorMessage(msg);
} else {
errorReporter.reportError(msg);
}
}
into all the grammars where I want this functionality, including the imported
grammars.
What I'd like to do is to define subclasses of Parser and TreeParser that
include this behavior already. I need a way for the method setErrorReporter()
in A to also work on B. Where I have <delegate> above is where I do this.
The issue is that, if I provide these methods in defined subclasses of Parser
and TreeParser, there seems to be no way in that code that can get to the
delegates without knowing their names. What I'd like for setErrorReporter() is
something like this (call my defined Parser subclass MyParser):
public void setErrorReporter(ErrorReporter errorReporter) {
this.errorReporter = errorReporter;
for (MyParser delegate : getDelegates()) {
delegate.setErrorReporter(errorReporter);
}
}
First, is there any way to do what I'm trying to do here? Second, if there's
not, is there a good workaround (I have a feeling that I might have to change
ANTLR's processing of imports to generate that getDelegates() method)?
Any help appreciated
.bill
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