add xml node property row and column in document file

[xfcanyue]

sometimes, i need to know a xml_node's location in the document.

it's useful to edit xml from another program interface. when edited, dynamically update the document, not reload the document.

thanks very much, i like pugixml.

[zeux]

Currently the parser doesn't track row/column information, and there's also no space in the node to store this (making nodes larger would penalize workloads that don't need this info).

You do have xml_node::offset_debug(); it is essentially a byte position of the node in the file, which could be used to recover the row/column offset manually (of course that's a bit cumbersome).

I do have a plan to introduce a separate, optional table that could be used to store & query this data; this is tracked in #12.

[xfcanyue]

did you have finished this plan ?