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time: document hhmmss formats

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Fixes #52516

Change-Id: I173fdb09c245563e09be4e1aacfd374c3a764d74
GitHub-Last-Rev: 14a81e5061
GitHub-Pull-Request: golang/go#52538
Reviewed-on: https://go-review.googlesource.com/c/go/+/402058
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
This commit is contained in:
cuiweixie 2022-04-26 23:55:11 +00:00 committed by Gopher Robot
parent 68b655f2b9
commit 24b570354c
2 changed files with 21 additions and 6 deletions
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11
src/time/example_test.go
View File

@ -212,6 +212,11 @@ func ExampleTime_Format() {
panic(err)
}
tz, err := time.LoadLocation("Asia/Shanghai")
if err != nil { // Always check errors even if they should not happen.
panic(err)
}
// time.Time's Stringer method is useful without any format.
fmt.Println("default format:", t)
@ -221,6 +226,10 @@ func ExampleTime_Format() {
// The time zone attached to the time value affects its output.
fmt.Println("Same, in UTC:", t.UTC().Format(time.UnixDate))
fmt.Println("in Shanghai with seconds:", t.In(tz).Format("2006-01-02T15:04:05 -070000"))
fmt.Println("in Shanghai with colon seconds:", t.In(tz).Format("2006-01-02T15:04:05 -07:00:00"))
// The rest of this function demonstrates the properties of the
// layout string used in the format.
@ -286,6 +295,8 @@ func ExampleTime_Format() {
// default format: 2015-02-25 11:06:39 -0800 PST
// Unix format: Wed Feb 25 11:06:39 PST 2015
// Same, in UTC: Wed Feb 25 19:06:39 UTC 2015
//in Shanghai with seconds: 2015-02-26T03:06:39 +080000
//in Shanghai with colon seconds: 2015-02-26T03:06:39 +08:00:00
//
// Formats:
//

16
src/time/format.go
View File

@ -64,17 +64,21 @@ import "errors"
//
// Numeric time zone offsets format as follows:
//
// "-0700" ±hhmm
// "-07:00" ±hh:mm
// "-07" ±hh
// "-0700" ±hhmm
// "-07:00" ±hh:mm
// "-07" ±hh
// "-070000" ±hhmmss
// "-07:00:00" ±hh:mm:ss
//
// Replacing the sign in the format with a Z triggers
// the ISO 8601 behavior of printing Z instead of an
// offset for the UTC zone. Thus:
//
// "Z0700" Z or ±hhmm
// "Z07:00" Z or ±hh:mm
// "Z07" Z or ±hh
// "Z0700" Z or ±hhmm
// "Z07:00" Z or ±hh:mm
// "Z07" Z or ±hh
// "Z070000" Z or ±hhmmss
// "Z07:00:00" Z or ±hh:mm:ss
//
// Within the format string, the underscores in "_2" and "__2" represent spaces
// that may be replaced by digits if the following number has multiple digits,