{"", "2006-01-02 15:04:05.999999999 -0700 MST", "2010-02-04 21:00:57.012345678 -0800 PST", true, false, 1, 9},
	// comma "," separator.
	{"", "2006-01-02 15:04:05,9999 -0700 MST", "2010-02-04 21:00:57 -0800 PST", true, false, 1, 0},
	{"", "2006-01-02 15:04:05,999999999 -0700 MST", "2010-02-04 21:00:57 -0800 PST", true, false, 1, 0},

	// Output:
	// 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:
	//
	// Basic full date  "Mon Jan 2 15:04:05 MST 2006" gives "Wed Feb 25 11:06:39 PST 2015"
	// Basic short date "2006/01/02" gives "2015/02/25"

	{2011, 11, 6, 2, 0, 0, 0, Local, 1320573600},   // 2:00:00 PST

	{2011, 3, 13, 1, 0, 0, 0, Local, 1300006800},   // 1:00:00 PST
	{2011, 3, 13, 1, 59, 59, 0, Local, 1300010399}, // 1:59:59 PST
	{2011, 3, 13, 3, 0, 0, 0, Local, 1300010400},   // 3:00:00 PDT
	{2011, 3, 13, 2, 30, 0, 0, Local, 1300008600},  // 2:30:00 PDT ≡ 1:30 PST
	{2012, 12, 24, 0, 0, 0, 0, Local, 1356336000},  // Leap year

			continue
		}
		// check for badly ordered starts
		pst := is[i-1].st
		pen := is[i-1].en
		if pst >= st {
			return fmt.Errorf("range start not ordered %d:%d less than prev %d:%d", st, en,
				pst, pen)
		}
		// check end of last range against start of this range
		if pen > st {
			return fmt.Errorf("bad range elem %d:%d overlaps prev %d:%d", st, en,
				pst, pen)
		}
	}
	return nil
}

or string types and associate methods with them:
</p>

<pre>
type TimeZone int

const (
	EST TimeZone = -(5 + iota)
	CST
	MST
	PST
)

func (tz TimeZone) String() string {
	return fmt.Sprintf("GMT%+dh", tz)
}
</pre>


<h3 id="Variable_declarations">Variable declarations</h3>

<p>

or string types and associate methods with them:
</p>

<pre>
type TimeZone int

const (
	EST TimeZone = -(5 + iota)
	CST
	MST
	PST
)

func (tz TimeZone) String() string {
	return fmt.Sprintf("GMT%+dh", tz)
}
</pre>

<p>
If the type definition specifies <a href="#Type_parameter_declarations">type parameters</a>,