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spec: add example for continue to label

Make the break example slightly more interesting
Update #5725
Effective Go will be updated in a separate CL.

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/13368054
This commit is contained in:
Rob Pike 2013-09-17 07:41:11 +10:00
parent 6a1022a094
commit cec0954dd0

View File

@ -1,6 +1,6 @@
<!--{
"Title": "The Go Programming Language Specification",
"Subtitle": "Version of Sep 12, 2013",
"Subtitle": "Version of Sep 16, 2013",
"Path": "/doc/spec"
}-->
@ -3345,7 +3345,7 @@ As an exception to the addressability requirement, <code>x</code> may also be a
(possibly parenthesized)
<a href="#Composite_literals">composite literal</a>.
If the evaluation of <code>x</code> would cause a <a href="#Run_time_panics">run-time panic</a>,
then the evaluation of <code>&x</code> does too.
then the evaluation of <code>&amp;x</code> does too.
</p>
<p>
@ -3365,7 +3365,7 @@ will cause a <a href="#Run_time_panics">run-time panic</a>.
var x *int = nil
*x // causes a run-time panic
&*x // causes a run-time panic
&amp;*x // causes a run-time panic
</pre>
@ -4997,11 +4997,17 @@ and that is the one whose execution terminates.
</p>
<pre>
L:
for i &lt; n {
switch i {
case 5:
break L
OuterLoop:
for i = 0; i &lt; n; i++ {
for j = 0; j &lt; m; j++ {
switch a[i][j] {
case nil:
state = Error
break OuterLoop
case item:
state = Found
break OuterLoop
}
}
}
</pre>
@ -5023,6 +5029,18 @@ If there is a label, it must be that of an enclosing
advances.
</p>
<pre>
RowLoop:
for y, row := range rows {
for x, data := range row {
if data == endOfRow {
continue RowLoop
}
row[x] = data + bias(x, y)
}
}
</pre>
<h3 id="Goto_statements">Goto statements</h3>
<p>