The only "disadvantage" i could think would be increasing the ways one
could create variables:
var i int
i := 0
:i = 0
and it allows this madness:
:a, b, :c, d, :e = 0, 1, 2, 3, 4
Otherwise i like the idea, but i don't mind using the long version in pro
of simplicity.
On Mon, 28 Dec 2020, 16:40 bobj...@gmail.com, <bobja...@gmail.com> wrote:
> For the case of multiple variable assignment where some of the target
> variables are to be created in the local scope and some are to be found in
> the existing scope...
>
> Allow:
>
> existingVar, :newVar = 1, 2
>
> instead of:
>
> var newVar int
> existingVar, newVar = 1, 2
>
> That additional line for explicit local var declaration clutters the
> program and could even be a bit confusing.
>
> With this suggestion, current syntax and semantics of multiple assignment
> stay the same. Use of the more concise syntax is optional, of course.
>
> Advantages:
> - More readable
> - More concise
> - Easier to understand at a glance -- current rules are a tad complex and
> require knowledge of previously-declared variables in the current block
> - Does not break existing programs
> - I look at this as "factoring out" the colon :)
>
> Disadvantages:
> - Can't think of any
>
> For me, the most common use case is where the first variable exists
> outside of the enclosing block and the second is an error to be handled
> locally:
>
> var err error
> loopCount, err = strconv.Atoi(arg)
> if err != nil {
> ...
>
> Always bothers me to have to insert that "err" declaration. To me, this
> seems much nicer:
>
> loopCount, :err = strconv.Atoi(arg)
> if err != nil {
> ...
>
> I think the above is a worthwhile improvement and should be considered.
>
> Thoughts?
>
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