Swiftformat: Rule to force position of else statement in multiline guard statements

[mgrebenets]

Would it be possible to have a rule that enforces else position in multi-line guard statements?
E.g.

guard
  let a = a,
  let b = b else {
  return
}

would be formatted into

guard
  let a = a,
  let b = b
else {
  return
}

At the moment SwiftFormat leaves code like this untouched.

I believe this is related to #37.

[mgrebenets]

Another useful formatting rule would be to enforce uniform formatting for multiline guards.

For example, when guard is multiline, but there is no newline after guard itself:

guard let a = a,
  let b = b
else {
 return
}

Could be formatted into

guard
  let a = a,
  let b = b
else {
  return
}

Since it's clear that guard is multiline here.

[nicklockwood]

@mgrebenets do you think it would make sense to tie this to the existing elseOnSameLine rule configuration? It seems related.

[rafcabezas]

@nicklockwood Please don't tie it into the elseOnSameLine rule. We use else on same line for everything except multiline guards

[rafcabezas]

A rule to enforce the multiline guard formatting would be greatly appreciated, though. With our current setup, swiftformat seems to respect/infer the current multiline guard format and leave it as is; but the reason we're using swiftformat is to enforce a certain formatting style, so it kind of defeats the purpose :)

[hartbit]

Same here.

[nicklockwood]

@mgrebenets @rafcabezas @hartbit this is now implemented in 0.45.1. It's controlled by a new --guardelse option.