Still a mistake there. All "MyReader" uses should be "*MyReader".
On Friday, September 11, 2020 at 11:02:49 PM UTC-4 Di gg wrote:
> Sorry, the last 4 lines should be:
>
> rs = (MyReader string)(rb)
> _, _ = rs.Read(s)
> rb = (MyReader []byte)(rs)
> _, _ = rb.Read(bs)
>
> On Friday, September 11, 2020 at 11:00:12 PM UTC-4 Di gg wrote:
>
>> An example demostrating how to let Reader.Read support both string and
>> []byte parameters.
>>
>> package readonlybytes[T] (
>> assert T.kind & (String | Slice)
>> )
>>
>> package Reader[T] (
>> assert readonlybytes[T]
>> ){
>> type Reader interface {
>> Read(bytes T)(n int, err error)
>> }
>> }
>>
>> package MyReader[T](
>> assert T.kind & (String | Slice)
>> ){
>> type MyReader struct{}
>>
>> type (r *MyReader) Read(s T)(int, error) {
>> return len(s), nil
>> }
>> }
>>
>> // use it:
>>
>> var mrs MyReader string
>> var mrb MyReader []byte
>>
>> s := "Golang"
>> bs := make([]byte, 100)
>>
>> var rs Reader string = mrs
>> _, _ = rs.Read(s)
>> var rb Reader []byte = mrb
>> _, _ = rb.Read(bs)
>>
>> rb = (MyReader string)(rs)
>> _, _ = rb.Read(bs)
>> rs = (MyReader []byte)(rb)
>> _, _ = rs.Read(s)
>>
>>
>>
>> On Wednesday, August 26, 2020 at 1:16:49 PM UTC-4 Di gg wrote:
>>
>>>
>>>
>>> https://github.com/dotaheor/unify-Go-builtin-and-custom-generics/blob/master/use-package-as-gen.md
>>>
>>> This is an alternative generic idea set, which should be Go 1 compatible.
>>> It tries to use the same syntax forms as builtin generics.
>>>
>>> Different from the official draft, it adopts a from-top-to-bottom
>>> pattern,
>>> instead of the from-bottom-to-top pattern, to describe type parameters.
>>> For example, given a map type parameter M, its key and element types
>>> could
>>> be denoted as M.key and M.element, whereas to use a map type parameter,
>>> its key and elements must also present in the declaration signarure or
>>> constraint definitions.
>>>
>>>
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