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doc: clarify non-nil zero length slice to array pointer conversion

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There is an example for nil slice already, so adding example for non-nil
zero length slice, too, clarifying to the reader that the result is also
non-nil and different from nil slice case.

Updates #395

Change-Id: I019db1b1a1c0c621161ecaaacab5a4d888764b1a
Reviewed-on: https://go-review.googlesource.com/c/go/+/336890
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
This commit is contained in:
Cuong Manh Le 2021-07-24 18:34:16 +07:00
parent 1868f8296e
commit ecaa6816bf
1 changed files with 4 additions and 1 deletions
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5
doc/go_spec.html
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@ -1,6 +1,6 @@
<!--{
"Title": "The Go Programming Language Specification",
"Subtitle": "Version of Jul 24, 2021",
"Subtitle": "Version of Jul 26, 2021",
"Path": "/ref/spec"
}-->
@ -4335,6 +4335,9 @@ s4 := (*[4]byte)(s) // panics: len([4]byte) > len(s)
var t []string
t0 := (*[0]string)(t) // t0 == nil
t1 := (*[1]string)(t) // panics: len([1]string) > len(t)
u := make([]byte, 0)
u0 = (*[0]byte)(u) // u0 != nil
</pre>
<h3 id="Constant_expressions">Constant expressions</h3>