On Thu, Oct 20, 2016 at 10:47 PM, T L <tapir....@gmail.com> wrote:
>
> On Friday, October 21, 2016 at 1:11:32 AM UTC+8, Ian Lance Taylor wrote:
>>
>> On Thu, Oct 20, 2016 at 6:47 AM, T L <tapi...@gmail.com> wrote:
>> >
>> > On Thursday, October 20, 2016 at 4:46:52 PM UTC+8, Dave Cheney wrote:
>> >>
>> >> What is a pointer wrapper value?
>> >
>> >
>> > struct {
>> > p *T
>> > }
>> >
>> >>
>> >>
>> >> in all seriousness, if you review the git history of the Go spec you'll
>> >> find the word "reference" was purged about two years ago, in effect, to
>> >> try
>> >> to stem these discussions.
>> >
>> >
>> > Yes, I found many old docs and old web pages are still using the word
>> > "reference value".
>> > I think it is an unnecessary word. The concepts of values and pointer
>> > values
>> > are sufficient to understand Golang values well.
>>
>> I have a minor objection. I don't know what a "reference value" is.
>> Alan spoke about "reference types", and sometimes, in the past, before
>> we realized that it was confusing, the Go docs also talked about
>> "reference types."
>>
>> I don't think we ever talked about "reference values." Perhaps a
>> "reference value" is a value whose type is a "reference type."
>> However, people (not Go people, computer programming people in
>> general) also talk about "passing by reference" as opposed to "passing
>> by value", so combining the two opposing terms "reference" and "value"
>> into a single phrase is confusing.
>
> This faq, "Why are maps, slices, and channels references while arrays are
> values?", https://golang.org/doc/faq#references.
> thinks maps, slices, and channels are references. I think the "references"
> here means "reference values".
As Marvin said in his reply, it doesn't.
I'm not trying to say that "reference value" could not have a meaning.
I'm saying that I've never seen that phrase before, and given the long
history of discussions using these words I find it confusing.
Ian
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