starling

A pure and lazy functional language.

Getting started

To install, run:

$ python setup.py install

You can start the starling interpreter with the command:

$ starling

Examples

You can do basic arithmetic (but no operator precedence yet):

>>> ((1 + 2) * 8) pow 2
576
>>> (702 / 2) mod 8
7

Curried functions and list operations:

>>> map (*2) (range 0 10)
[0, 2, 4, 6, 8, 10, 12, 14, 16, 18]
>>> sort [3, 1, 10]
[1, 3, 10]

Infinite lists, nested scopes and functions/lambdas:

>>> let is_odd = (x -> (x mod 2) != 0) in take 5 >> (filter is_odd) nats
[1, 3, 5, 7, 9]

Concise, JSON-esque object definitions:

>>> shopping_list = [{name="eggs", price=2}, {name="milk", price=3}]
>>> eggs = shopping_list@0
>>> eggs.price
2
>>> eggs.name
eggs
>>> map (.name) shopping_list
["eggs", "milk"]

Importing modules:

>>> re = import regex
>>> re.match "(mur)+" "murmurmurmur"
{match=True, rem=[], str="murmurmurmur"}

What's next?

• Compilation to LLVM
• Bootstrapping the compiler in Starling itself
• Introduce type inference
• Operator precedence
• Support for I/O and impure behaviour