I am writing a program that uses branch labels. It uses your example
pattern to break out of a loop when a particular `select` situation occurs.
Branch labels are not indented because they represent unusual locations for
modifying the flow of control. This seems perfectly cromulent to me.
A branch label does not have to begin with a capital letter. Where did you
get the idea it has to begin with a capital letter? Also, what you call a
"loop" label is better characterized as a branch label.
On Mon, Oct 2, 2023 at 10:12 PM 王富民awaw <a...@nandalu.idv.tw> wrote:
> I wonder does anyone know the reason and history of why loop labels are
> styled as such:
>
> * Labels are *unindented*.
> All Go constructs, such as fields in structs indent to the right.
> Why does loop labels unindented to the left?
> * Labels start with capital letters.
> Since all other Go identifiers start with lower case, why is loop label
> an exception?
>
> ```
> func foo() {
> ok := true
> // Why is the loop label unindented backwards to the left?
> Loop:
> for {
> switch {
> case ok:
> // Why is the loop label capitalized?
> break Loop
> }
> }
> }
> ```
>
> Thanks in advance to those who are ancient enough to share the story
> behind loop labels.
>
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--
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