On 9/7/11 7:36 PM, "Jim Idle" <[email protected]> wrote:
Hi Jim,
> You remember that this is all open source, freely given right?
Of course I do :-)
And I have read sources of ANTLR 3.4, be sure.
Btw, my congratulations and respect. Very high quality code.
> Generally,
> don't try and mix C++ things in with the C. Exceptions are almost
> certainly not want you want for error reporting while parsing anyway.
> As I said earlier, copy the existing routine and adapt it. It does as many
> things as it can to show you how to access the information. I can't
> provide a universal error message handler as there is no way to know what
> information your particular parser will have available or how you want the
> messages to look and so on. All your customer error handler need do is
> call a C++ object that you provide and that object can collect the errors
> so that you can print them out at the end etc. The source code is right
> there and well commented :)
Ahhaa, I hope I have to hear you ...
I will try say it now by own words to double check.
* so we must implement own dsiplayError() -- this is clear.
* we must NOT throw here any C++ exception.
Instead, we must just build some Err String and put it
e.g. Into our own Stack of such error strings
* then we do
AST = parser->entryRule()
MyNodes = treePareser->entryRule()
Zero exceptions here
Then we just do
if( errCount > 0 )
{
stop job
somehow report errors to user
for example
point ZZZ:
throw myException( ErrStack->getErrors() ;)
}
Sounds right?
Thank you, Jim for points.
-----------------
Well, only one more question come to mind. :-)
I have read that ANTLR3-C self build LIST OF exception objects.
Is this true?
If yes, then may be this is not needed? I mean override displayError()
method?
>> All your customer error handler need do is
>> call a C++ object that you provide and that object can collect the errors
>> so that you can print them out at the end etc.
And we can "convert" that list into exception at point ZZZ in the above
example?
--
Best regards,
Ruslan Zasukhin
VP Engineering and New Technology
Paradigma Software, Inc
Valentina - Joining Worlds of Information
http://www.paradigmasoft.com
[I feel the need: the need for speed]
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