Support for enforced and/or filtered attributes

[dkcas11]

Hi,

From reading the documentation it doesn't seem to be possible apply external rules to the parser.
I'd like to make sure that all points gathered all contain elevation too, and not reiterate over the points again once the parser is complete but rather inject this logic.

Basically inject logic into the check of data, to either ensure the data is correct and throw an error, or simply filter out the "bad" data that doesn't contain what you as the developer would like the data to contain.

What do you think about this idea?

Best regards,
Casper

[vincentneo]

Hi Casper,

That does sound like a nice idea, though not sure if it would be easy to implement.
I'll probably get to it after #63 is done.