===== script =====
# Simple chained assignment
a = b = "foo"
print a
print b

print ""

# Check return value of chained assignment. Also does local assignment `:=` work?
print ({
    a = b := "bar"
})
print a
print b

print ""

# Throw a list matching in there
l = [x y] = [1 2]
print l
print x
print y

print ""

# Same as first two tests, but force using the matcher mechanism

[a] = [b] = ["foo"]
print a
print b

print ""

print ({
    [a] = [b] := ["bar"]
})
print a
print b

===== output =====
foo
foo

bar
bar
foo

[
  1
  2
]
1
2

foo
foo

[
  "bar"
]
bar
foo