Commit ae13f438 authored by Ian Lance Taylor's avatar Ian Lance Taylor

Clarify when expressions are evaluated for a range clause.

R=gri, rsc
CC=golang-dev
https://golang.org/cl/189057
parent 14a74378
......@@ -3783,7 +3783,12 @@ string or array element or map value.
The types of the array or slice index (always <code>int</code>)
and element, or of the map key and value respectively,
must be <a href="#Assignment_compatibility">assignment compatible</a> with
the type of the iteration variables.
the type of the iteration variables. The expression on the right hand
side is evaluated once before beginning the loop. At each iteration
of the loop, the values produced by the range clause are assigned to
the left hand side as in an <a href="#Assignments">assignment
statement</a>. Function calls on the left hand side will be evaluated
exactly once per iteration.
</p>
<p>
For strings, the "range" clause iterates over the Unicode code points
......
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