-- main.mcl --
# this should be a function as a value, iow a lambda
$prefixer = func($x) {
	"hello" + $x	# i'd only ever expect one "hello" string in the graph
}

$out1 = $prefixer("a")
$out2 = $prefixer("b")

test $out1 {} # helloa
test $out2 {} # hellob
-- OUTPUT --
Edge: call:_operator(str("+"), str("hello"), var(x)) -> func(x) { call:_operator(str("+"), str("hello"), var(x)) } # body
Edge: call:_operator(str("+"), str("hello"), var(x)) -> func(x) { call:_operator(str("+"), str("hello"), var(x)) } # body
Edge: call:prefixer(str("a")) -> var(out1) # var:out1
Edge: call:prefixer(str("b")) -> var(out2) # var:out2
Edge: func(x) { call:_operator(str("+"), str("hello"), var(x)) } -> call:prefixer(str("a")) # call:prefixer
Edge: func(x) { call:_operator(str("+"), str("hello"), var(x)) } -> call:prefixer(str("b")) # call:prefixer
Edge: str("+") -> call:_operator(str("+"), str("hello"), var(x)) # op
Edge: str("+") -> call:_operator(str("+"), str("hello"), var(x)) # op
Edge: str("a") -> call:prefixer(str("a")) # x
Edge: str("a") -> var(x) # var:x
Edge: str("b") -> call:prefixer(str("b")) # x
Edge: str("b") -> var(x) # var:x
Edge: str("hello") -> call:_operator(str("+"), str("hello"), var(x)) # a
Edge: str("hello") -> call:_operator(str("+"), str("hello"), var(x)) # a
Edge: var(x) -> call:_operator(str("+"), str("hello"), var(x)) # b
Edge: var(x) -> call:_operator(str("+"), str("hello"), var(x)) # b
Vertex: call:_operator(str("+"), str("hello"), var(x))
Vertex: call:_operator(str("+"), str("hello"), var(x))
Vertex: call:prefixer(str("a"))
Vertex: call:prefixer(str("b"))
Vertex: func(x) { call:_operator(str("+"), str("hello"), var(x)) }
Vertex: func(x) { call:_operator(str("+"), str("hello"), var(x)) }
Vertex: str("+")
Vertex: str("a")
Vertex: str("b")
Vertex: str("hello")
Vertex: var(out1)
Vertex: var(out2)
Vertex: var(x)
Vertex: var(x)