Boo is a new (2004) object oriented statically typed programming language for the Common Language Infrastructure with a Python inspired syntax and a special focus on language and compiler extensibility. Some features of note include generators, multimethods, optional duck typing, macros, true closures, currying, and first class functions.
Boo is open source licensed under an MIT/BSD style license.
Code samples
print("Hello, world!")
Fibonacci series generator function:
def fib():
a as long, b as long = 0, 1
while true:
yield b
a, b = b, a + b
Asynchronous design pattern with a closure:
import System
def run():
print("executing")
print("started")
result = run.BeginInvoke({ print("called back") })
System.Threading.Thread.Sleep(50ms)
run.EndInvoke(result)
print("done")
def plus_a(a as int):
return { b as int | return a + b }
print plus_a(3)(4)