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doc: clarify non-nil zero length slice to array pointer conversion
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>
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@ -1,6 +1,6 @@
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<!--{
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"Title": "The Go Programming Language Specification",
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"Subtitle": "Version of Jul 24, 2021",
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"Subtitle": "Version of Jul 26, 2021",
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"Path": "/ref/spec"
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}-->
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@ -4335,6 +4335,9 @@ s4 := (*[4]byte)(s) // panics: len([4]byte) > len(s)
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var t []string
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t0 := (*[0]string)(t) // t0 == nil
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t1 := (*[1]string)(t) // panics: len([1]string) > len(t)
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u := make([]byte, 0)
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u0 = (*[0]byte)(u) // u0 != nil
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</pre>
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<h3 id="Constant_expressions">Constant expressions</h3>
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