spec: clarify when range expression is evaluated

Clarify that the range expression of a "for" loop is called *just* once to rule out that it might be re-evaluated after each iteration. Change-Id: Iedb61cd29e5238ac0168b8ac01c34d6208cc4312 Reviewed-on: https://go-review.googlesource.com/c/go/+/582775 Reviewed-by: Robert Griesemer <[email protected]> Auto-Submit: Ian Lance Taylor <[email protected]> LUCI-TryBot-Result: Go LUCI <[email protected]> Reviewed-by: Ian Lance Taylor <[email protected]>
golang · May 2, 2024 · 344075d · 344075d
1 parent e602625
commit 344075d
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/doc/go_spec.html b/doc/go_spec.html
@@ -6643,7 +6643,7 @@ <h4 id="For_range">For statements with <code>range</code> clause</h4>
 </p>
 
 <p>
-The range expression <code>x</code> is evaluated once before beginning the loop,
+The range expression <code>x</code> is evaluated before beginning the loop,
 with one exception: if at most one iteration variable is present and <code>x</code> or
 <a href="#Length_and_capacity"><code>len(x)</code></a> is <a href="#Constants">constant</a>,
 the range expression is not evaluated.