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spec: simplify paragraph on certain range expressions over arrays

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Fixes #22258.

Change-Id: I43e68f1cf3163e1a041ebff2734ff2cb7943f695
Reviewed-on: https://go-review.googlesource.com/71431
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
griesemer 2017-10-17 15:30:12 -07:00 committed by Robert Griesemer
parent 3813f941f6
commit ada6557593
1 changed files with 4 additions and 6 deletions
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10
doc/go_spec.html
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@ -5028,12 +5028,10 @@ the range clause is equivalent to the same clause without that identifier.
</p>
<p>
The range expression is evaluated once before beginning the loop,
with one exception: if the range expression is an array or a pointer to an array
and at most one iteration variable is present, only the range expression's
length is evaluated; if that length is constant,
<a href="#Length_and_capacity">by definition</a>
the range expression itself will not be evaluated.
The range expression <code>x</code> is evaluated once before beginning the loop,
with one exception: if at most one iteration variable is present and
<code>len(x)</code> is <a href="#Length_and_capacity">constant</a>,
the range expression is not evaluated.
</p>
<p>