Algebraic Data Type - language feature

declare type numOrString = string | number

Example from Coconut:

data Empty()
data Leaf(n)
data Node(l, r)

def size(Empty()) = 0

addpattern def size(Leaf(n)) = 1

addpattern def size(Node(l, r)) = size(l) + size(r)

Languages with Algebraic Data Type include TypeScript, Coconut

Read more about Algebraic Data Type on the web: 1.

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