Calculator on each selection

[carrascomj]

Use case

When manipulating CSVs or tables in latex, markdown, etc. sometimes I want to compute a numerical operation on columns.

Feature

Evaluate an arithmetic expression on each selection on the typable command "calc" (similar to "pipe").

Design details

• In the prompt, "%" represents each range fragment. This should definitely be changed because it is an actual operator (and it has a very different and vim which one may want to avoid).
• After replacement, the expression gets evaluated using the eval crate, which introduces another dependency.
• In the example above I am replacing the ranges, but I would prefer to copy them to the default register.

I have grepped through kakoune's documentation at Gtihub without any luck so I don't know about the prior art. If this feature gets fleshed out and there's interest I can submit a PR.

This behaviour can be achieved using the :pipe command and bc (maybe with xargs), but I have never ever got it right.

[pascalkuthe]

Something like this should wait for the built-in scripting language which would be used instead of eval here.

[carrascomj]

That's probably the best option since the eval crate has been abandoned for some time and the feature is a bit niche.

It is still very handy. Something like this plus virtual space for indentation and some syntax highligting would make a great csv.hx plugin.