foo != 0
a=aaa
foo bar <"bbb $a ccc" >ddd 2>>EOE == 2
eee
EOE
foo
bar
$cxx.target.class
foo = baz
$foo
fox = $foo-$cxx.target.class
$fox
$test
$~
$*
$0
test = xxx
$0
$*
test.options += --foo
$1
$*
test.arguments += bar
$2
$*
($3 == [null])

x = [uint64] 001
foo $x
cmd abc$(x)23
cmd >>EOO << EOI
foo
$x
bar
EOO
$x$x$x
EOI

y = >>
cmd "2"$y