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# To demonstrate tangle directives, we'll construct a factorial function with
# separate base and recursive cases. Compare factorial.mu.
# This isn't a very realistic example, just a simple demonstration of
# possibilities.
recipe factorial [
default-space:address:array:location <- new location:type, 30:literal
n:integer <- next-ingredient
{
+base-case
}
+recursive-case
]
after +base-case [
# if n=0 return 1
zero?:boolean <- equal n:integer, 0:literal
break-unless zero?:boolean
reply 1:literal
]
after +recursive-case [
# return n * factorial(n - 1)
x:integer <- subtract n:integer, 1:literal
subresult:integer <- factorial x:integer
result:integer <- multiply subresult:integer, n:integer
reply result:integer
]
recipe main [
1:integer <- factorial 5:literal
$print [result: ], 1:integer, [
]
]
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