nimsuggest: Set a case style preference

[gwennlbh]

Summary

A new flag --case or --case-style that can take one of the following values:

• snake for lower_underscore_case
• camel for camelCase
• pascal for PascalCase
• lower for lowercasewithnoseparators

A function to convert from any style to the chosen one is ran on all variable/types/functions suggestions nimsuggest makes so that developers can choose their preferred style (which I believe is one of the reasons why Nim is case-insensitive)

Description

Currently, if a library uses a different case style, you have two competing options:

• taking advantage of nimsuggest and accepting suggestions that will create an inconsistent code style
• typing out the function's name in its entirety while watching the suggestion just above nag you (which can be a bit irritating)

Both have disadvantages. The proposed feature only keeps the best of both worlds.

Alternatives

Not exactly an alternative, but rather an extension of the configuration that I think might be a bit too extreme: specify different types for different things, like how functions are snake_case while classes are PascalCase in some languages. This requirement could be specified by making --case-style accept a space-separated list of <kind>s:<style> pairs, where <kind> is function, variable, constant, etc. and <style> is a case style to be associated with that kind of "object".

The simpler format and this more advanced one could coexist: if no : appears in --case-style, use the simpler format (just one case style), otherwise, use the more extensive one.

Examples

--case-style snake will autocomplete with snake_case'd functions
--case-style "constants:pascal functions:lower" will autocomplete with PascalCase'd constant names and lowercased function names

[RSDuck]

I implemented something like this once, but from the side of the VSC addon: pragmagic/vscode-nim#82

[Akronae]

Is there any advancement on this?
Supporting different case types is something that is really bragged on about Nim, but in reality it is impossible to conveniently code using snake_case as nimsuggest/std lib is totally opiniated to camelCase.

How about not having to configure anything at all but just nimSuggest infering your coding style from your input ?
E.g:

I have a module A with a proc myProc
if I type A. nimsuggest will suggest me A.myProc
if I type A.my_ nimsuggest will suggest A.my_proc

A more advanced flavor would be for nimsuggest to look backward and check wether I used snake_case for other identifiers and suggest straight away A.my_proc while still suggesting A.myProc if I type A.myP

Seems simple enough, I'm pretty new to Nim though maybe there is something I'm overlooking.
I would be interested to contribute.

[Araq]

Not planned. PRs acceptable.