[antlr-interest] Re: Error recovery

[lgcraymer]

What you really want to change is the input buffering.  Check out
CharBuffer.java in the antlr directory and write an equivalent
(assuming that you are using Java--C++ and C# differ) that blocks on
interactive input at end of line rather than returning EOF.

--Loring


--- In antlr-interest at yahoogroups.com, "jduquevieira" <jpdv at m...> wrote:
> Hello.
> 
> I have a math editor that uses ANTLR as the parser.
> Now I have problems recovering from errors.
> 
> For instance, if the user writes:
>     "2+"
> 
> The parser can't handle it, because it expects another number after 
> the sum operator:
>     "2+<number>"
> 
> I've tried to handle it with exceptions and got no good results.
> Besides, by using exceptions the parser gets too slow.
> 
> I've also tried to write every possibility in every rule, but I get 
> a lot of ambiguities.
> 
> Does anyone know how to do this?
> Any ideas?
> 
> Thanks in advance.
> Best regards.



 
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