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go spec: clarification of channel close()

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CC=golang-dev
https://golang.org/cl/1766042
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Robert Griesemer 2010-07-14 16:09:22 -07:00
parent 708d7160fa
commit dc60c5a7ec
1 changed files with 10 additions and 7 deletions
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17
doc/go_spec.html
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@ -1,5 +1,5 @@
<!-- title The Go Programming Language Specification --> <!-- title The Go Programming Language Specification -->
<!-- subtitle Version of July 12, 2010 --> <!-- subtitle Version of July 14, 2010 -->
<!-- <!--
TODO TODO
@ -4347,14 +4347,17 @@ BuiltinArgs = Type [ "," ExpressionList ] | ExpressionList .
<h3 id="Close_and_closed">Close and closed</h3> <h3 id="Close_and_closed">Close and closed</h3>
<p> <p>
For a channel <code>c</code>, the predefined function <code>close(c)</code> For a channel <code>c</code>, the built-in function <code>close(c)</code>
marks the channel as unable to accept more marks the channel as unable to accept more values through a send operation;
values through a send operation. After any previously values sent to a closed channed are ignored.
After calling <code>close</code>, and after any previously
sent values have been received, receive operations will return sent values have been received, receive operations will return
the zero value for the channel's type. After at least one such zero value has been the zero value for the channel's type without blocking.
After at least one such zero value has been
received, <code>closed(c)</code> returns true. received, <code>closed(c)</code> returns true.
</p> </p>
<h3 id="Length_and_capacity">Length and capacity</h3> <h3 id="Length_and_capacity">Length and capacity</h3>
<p> <p>
@ -4560,10 +4563,10 @@ func recover() interface{}
</pre> </pre>
<p> <p>
<font color=red>TODO: Most of this text could move to the respective <span class="alert">TODO: Most of this text could move to the respective
comments in <code>runtime.go</code> once the functions are implemented. comments in <code>runtime.go</code> once the functions are implemented.
They are here, at least for now, for reference and discussion. They are here, at least for now, for reference and discussion.
</font> </span>
</p> </p>
<p> <p>