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nikolaos authored
In short, array literals containing spreads, when used as expressions, are rewritten using do expressions. E.g. [1, 2, 3, ...x, 4, ...y, 5] is roughly rewritten as: do { $R = [1, 2, 3]; for ($i of x) %AppendElement($R, $i); %AppendElement($R, 4); for ($j of y) %AppendElement($R, $j); %AppendElement($R, 5); $R } where $R, $i and $j are fresh temporary variables. R=rossberg@chromium.org BUG= Review URL: https://codereview.chromium.org/1564083002 Cr-Commit-Position: refs/heads/master@{#33307}
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