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A[] = key
#
# XXX: Note that if map is private, then the export will not work.
# This is because Sequence.foreach contains an unqualified export,
# and unqualified exports do not export the static/private environment.
#
Test(map) =
public.map = $(map)
A.foreach(key) =>
map = $(map.add $(key), new)
export map
new = $(map.find key)
if $(equal $(new), new)
println($"export map worked [SUCCESS]")
else
eprintln($"export map had no effect [FAILURE]")
exit 1
X. =
extends $(Map)
$|key| = old
Test($X)
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