Re: [Pyparsing] better parse error reporting

[Gre7g L. <haf...@ya...>]

--- "W. Martin Borgert" <de...@de...> wrote:

> That would be cool! I think, this is something most
> pyparsing
> users would welcome. How valuable sane error
> reporting is, one
> notices, if it's missing, such as in LaTeX. Thanks
> for any help!

Okay, here's a hack to try. It's not real pretty and I
haven't thoroughly tested it either, but it's a good
starting point, at least.

First, apply the following patch to pyparsing.py. Be
careful. Your line numbers may vary a bit because I've
added the ternary code discussed earlier which may not
be in the current release just yet:

http://pastie.textmate.org/177251

Then you can test it out with this really stupid
parser script:

http://pastie.textmate.org/177253

As you can see, all I'm doing is recording how far the
parser made it (hopefully I'm doing this at the right
spot) and keeping that in a global variable that you
can access later.

It's a little Kludgey, but as Kludges go, it is pretty
minor.

HTH,
Gre7g

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