Circa is a programming language designed for for rapid prototyping by andyfischer.
The intro page has some good information and the syntax example highlights some interesting ideas:
-- The @ operator is some syntactic sugar for rebinding -- an identifier to the result of the overall statement. -- These two lines do exactly the same thing: my_number = max(my_number, 40) max(@my_number, 40) -- Lists are indicated by []s -- List arguments also can be separated -- by commas or semicolons or spaces names = ['Absalom','Bouffant','Chilton'] numbers = [1 2 3] orders = [locate; evacuate; exterminate]
Looks neat!
The first syntax example there didn't quite work. It's supposed to say
Not to hard to whip up a grammar like that, just depends what your doing if you can get away with allowing optional commas etc