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slices: document that Clone can return extra capacity
Change-Id: I8b9aa1f36ce554d8855ee70e15f0dd0a8cf1097a Reviewed-on: https://go-review.googlesource.com/c/go/+/568342 Reviewed-by: Michael Knyszek <mknyszek@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Keith Randall <khr@golang.org> Reviewed-by: Keith Randall <khr@google.com> Auto-Submit: Ian Lance Taylor <iant@golang.org>
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@ -342,6 +342,7 @@ func Replace[S ~[]E, E any](s S, i, j int, v ...E) S {
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// Clone returns a copy of the slice.
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// Clone returns a copy of the slice.
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// The elements are copied using assignment, so this is a shallow clone.
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// The elements are copied using assignment, so this is a shallow clone.
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// The result may have additional unused capacity.
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func Clone[S ~[]E, E any](s S) S {
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func Clone[S ~[]E, E any](s S) S {
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// The s[:0:0] preserves nil in case it matters.
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// The s[:0:0] preserves nil in case it matters.
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return append(s[:0:0], s...)
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return append(s[:0:0], s...)
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