Expose info() api

[olalonde]

Add a function that exposes the info value. This is needed since description() is deprecated.

[hoodie]

If I understand this correctly this always gives you the same message as ScanError::to_string(). Is it really necessary to have it then?

[olalonde]

Not exactly the same:

"mapping values are not allowed in this context at line 4 column 4" (to_string())
"mapping values are not allowed in this context" (info())

Personally, it would help me because I use yaml-rust to parse a section of a larger file so the column/line info is wrong from the perspective of the end user. Right now, I trim the message I receive from to_string but that's not very elegant.

[olalonde]

@hoodie are you a maintainer of yaml-rust? I was under the impression it was unmaintained.

[hoodie]

I am not, just reading along, because I contributed a little in the past. I don't think it's unmaintained, but the maintainer seldomly checks the PRs.

[olalonde]

Ok well, the last commit was a year ago... That's pretty seldom indeed.

[davvid]

FWIW I've merged this into my fork: https://github.com/davvid/yaml-rust