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[release-branch.go1.9] time: fix documentation of Round, Truncate behavior for d <= 0

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Saying that they return t unchanged is misleading, because they return
a modified t, stripped of any monotonic clock reading, as of Go 1.9.

Fixes #21485.

Change-Id: Icddf8813aed3d687fcefcd2fe542829438be6a0a
Reviewed-on: https://go-review.googlesource.com/56690
Reviewed-by: Avelino <t@avelino.xxx>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-on: https://go-review.googlesource.com/70846
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Russ Cox <rsc@golang.org>
This commit is contained in:
Dmitri Shuralyov 2017-08-17 19:30:34 -04:00 committed by Russ Cox
parent c6388d381e
commit 2e4358c960
1 changed files with 2 additions and 2 deletions
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4
src/time/time.go
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@ -1383,7 +1383,7 @@ func Date(year int, month Month, day, hour, min, sec, nsec int, loc *Location) T
}
// Truncate returns the result of rounding t down to a multiple of d (since the zero time).
// If d <= 0, Truncate returns t unchanged.
// If d <= 0, Truncate returns t stripped of any monotonic clock reading but otherwise unchanged.
//
// Truncate operates on the time as an absolute duration since the
// zero time; it does not operate on the presentation form of the
@ -1400,7 +1400,7 @@ func (t Time) Truncate(d Duration) Time {
// Round returns the result of rounding t to the nearest multiple of d (since the zero time).
// The rounding behavior for halfway values is to round up.
// If d <= 0, Round returns t unchanged.
// If d <= 0, Round returns t stripped of any monotonic clock reading but otherwise unchanged.
//
// Round operates on the time as an absolute duration since the
// zero time; it does not operate on the presentation form of the