This patch changes the parser to allow for-of initializer
var-redeclaration of non-destructured catch parameters.
Previously, the spec allowed var-redeclaration of a
non-destructured catch parameter…
try {} catch (e) { var e; }
…except in the particular case where the var declaration is
a for-of initializer:
try {} catch (e) { for (var e of whatever) {} }
https://github.com/tc39/ecma262/pull/1393 removes this strange
exceptional case. This patch implements that change.
BUG=v8:8759
Change-Id: Ia4e33ac1eab89085f8a5fdb547f479cfa38bbee5
Reviewed-on: https://chromium-review.googlesource.com/c/1444954
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59209}
This allows us to stop tracking variables_ in the preparser.
This currently makes us track slightly more variables than neccessary in the
case `for (var ...` since `var ... of` needs to check conflicts with out simple
catch variables. We should probably track the names through a ScopedPtrList
instead of a ZonePtrList anyway. Then it won't matter anymore.
Change-Id: I64e3f9ab13af8269456439cf15b0bc4d5b9e5380
Reviewed-on: https://chromium-review.googlesource.com/c/1421360
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58960}
