Subj : Re: error handling in SpiderMonkey
To   : netscape.public.mozilla.jseng
From : frankin@miramar.com (Forest Rankin)
Date : Mon Aug 11 2003 11:20 am

I believe you answered this by saying the parser doesn't have error
recovery, but I just wanted to clarify. I would like to be able to
report all/most errors in the script at compile-time and runtime.

In the mozilla browser you can open the JavaScript console which will
display all the errors and warnings on the current page. I would like
to do something like this but I can only get the JS engine to report
one error. Does Firebird use Rhino and that's why it can report
multiple errors?

See the "error handling in Rhino" post from "Date: 2002-01-16 16:38:10
PST"

"""
Try installing your own custom ErrorHandler using 
Context.setErrorHandler, then calling Context.compileReader, passing a
null for the scope.

This is what the jsc tool does; you can see it reports two errors on
the
source file.

[rhino] cat test.js
function x() {
    return debugger;
}

function foo bar() {
}
[rhino] java -classpath build/rhino1_5R3/js.jar 
org.mozilla.javascript.tools.jsc.Main test.js
js: "test.js", line 2: identifier is a reserved word
js:     return debugger;
js: ..................^
js: "test.js", line 5: missing ( before function parameters
js: function foo bar() {
js: ...............^
"""

-forest

Brendan Eich <brendan@meer.net> wrote in message news:<3F349E18.1030101@meer.net>...
> Forest Rankin wrote:
> 
> >How do I get the SpiderMonkey engine go through a
> >Javascript script from start to end and report ALL syntax errors it
> >can find, rather than just stopping on the first syntax error and kicking
> >out?
> >
> 
> You'd have to add error recovery to the parser.  That's something I 
> wanted to do originally, but it never became important enough in 
> web-browser embeddings.
> 
> >I would also like to be able to log runtime errors and continue like
> >the browser does.
> >  
> >
> 
> What do you mean by continue?  An error that is not caught as an 
> exception stops the errant script or function in its tracks.
>
> /be

.