On Fri, Nov 12, 2021 at 4:29 PM tapi...@gmail.com <tapir....@gmail.com>
wrote:
> On Friday, November 12, 2021 at 11:10:17 PM UTC+8
> axel.wa...@googlemail.com wrote:
>
>> `range s` works differently for string and []byte. In the former case it
>> iterates over utf8-encoded unicode codepoints, in the latter it iterates
>> over bytes.
>>
>
> It is true, but why it matters here?
>
Because it makes `range` different operations for the purposes of
determining the allowed operations on a type-parameter.
>
>
>>
>> On Fri, Nov 12, 2021 at 3:18 PM tapi...@gmail.com <tapi...@gmail.com>
>> wrote:
>>
>>>
>>> func Bar[T []byte|string](s T) bool {
>>> for _, v := range s { // cannot range over s (variable of type T
>>> constrained by []byte|string) (T has no structural type)
>>> if v > 100 {
>>> return true
>>> }
>>> }
>>> return false
>>> }
>>>
>>> The message is quite confusing.
>>>
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