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Coconut

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Coconut is an open source programming language created in 2014.

#177on PLDB 10Years Old
Download source code:
git clone https://github.com/evhub/coconut

Try now: Web · Riju · TIO

Simple, elegant, Pythonic functional programming.


Example from Riju:
print("Hello, world!")
Example from hello-world:
"Hello World" |> print

Language features

Feature Supported Token Example
Strings "
"Hello world"
Print() Debugging print
Algebraic Data Type
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)
Function Composition
(f..g..h)(x, y, z)
Destructuring
{"list": [0] + rest} = {"list": [0, 1, 2, 3]}
Anonymous Functions
x -> x ** 2
Infix Notation
5 `mod` 3 == 2
Pattern Matching
match [head] + tail in [0, 1, 2, 3]:
   print(head, tail)

View source

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