Rule Proposal: no-spaced-func with never

[mysticatea]

From requireSpacesInCallExpression and disallowSpacesInCallExpression.

In JSCS, we can specify that spaces are required before the open parenthesis of call expressions.
In ESLint, no-spaced-func has a responsibility for spacing of call expressions.

This proposal is to add "always"/"never" option to no-spaced-func.
Maybe we should rename this rule to call-spacing or something like.

{
    "call-spacing": ["error", "always" or "never"]
}

• "always" - Requires spacing before the open parenthesis of call expressions.
• "never" (default) - Disallows spacing before the open parenthesis of call expressions. (the current behavior)

[alberto]

I can champion this one

[platinumazure]

I would support a rename. Double negatives would be confusing.

[alberto]

Good point, I agree. Maybe func-spacing or func-parens-spacing?

[platinumazure]

I liked the "call-spacing" @mysticatea had proposed. (Sorry, when I said "support" I was referring to his proposal, but I should have made that more clear.)

[mysticatea]

I thought that func-spacing is confusing between call expressions and function declarations. It's the reason I chose call word.

[alberto]

Yeah, sorry, I lost focus on the scope.

[nzakas]

How about func-call-spacing, as I'm not sure "call" is obvious on its own?

[nzakas]

Per TSC meeting (7/21/16), marking as accepted.

Note that is proposal includes deprecating no-spaced-func in favor of the new func-call-spacing rule.

[mysticatea]

Should we need to tweak eslint:all preset for deprecated rules?

[alberto]

@mysticatea I think it's better to discuss that as a separate issue

[mysticatea]

I opened #6734.

[btmills]

Working on this.