The reason for short variable declarations is, that it makes reuse easier
in cases of multiple return values. e.g.
var a, err = Foo()
if err != nil {
return err
}
var b, err = a.Bar()
if err != nil {
return err
}
doesn't work. That being said, the duplication between ways of declaring
variables has long been acknowledged as an unfortunate historical accident.
On Tue, Oct 18, 2016 at 5:09 PM, T L <tapir....@gmail.com> wrote:
>
>
> On Tuesday, October 18, 2016 at 11:01:18 PM UTC+8, Pietro Gagliardi
> (andlabs) wrote:
>>
>> No, the reason for short variable declarations is to avoid having to
>> stutter the type of variables everywhere.
>>
>
> You can also avoid having to stutter the type of variables by using var
> declaration.
>
>
>> It's part of the reason why Go is strongly typed yet doesn't fully feel
>> that way, and was one of the main design goals at first.
>>
>
>> Why the control statements require one, however, is something I wouldn't
>> know.
>>
> On Oct 18, 2016, at 10:50 AM, T L <tapi...@gmail.com> wrote:
>>
>>
>>
>> On Tuesday, October 18, 2016 at 10:40:02 PM UTC+8, Ian Lance Taylor wrote:
>>>
>>> On Tue, Oct 18, 2016 at 7:21 AM, T L <tapi...@gmail.com> wrote:
>>> >
>>> > alternative question, why followings are not accepted in syntax:
>>> >
>>> > if var x = 5; x > 3 {
>>> > _ = x
>>> > }
>>> >
>>> > for var x = range []int{0,1,2} {
>>> > _ = x
>>> >
>>> > }
>>> >
>>> > switch var x = "abc"; x {
>>> > default:
>>> > _ = x
>>> > }
>>> >
>>> > switch var x = (interface{}(true)).(type) {
>>> > default:
>>> > _ = x
>>> > }
>>>
>>> That syntax adds no functionality and, at least to me, seems uglier
>>> and harder to read.
>>>
>>> Ian
>>>
>>
>> So the reason of adding short variable declarations is just to avoid
>> so-called ugliness?
>>
>>
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