zunscript

ZunScript

ZunScript is a conceptual Scripting Language. Below are some loosely-defined syntax rules. I am borrowing and expanding upon concepts of Ruby, Python and Lua.

The main features I want to explore with ZunScript are method and parameter binding as well as a very monkeypatchable langauge. I am trying to boil everything down to the a few very simple and concise rules and ideas with clear syntax; On a higher level than Lua but not as polluted as Ruby is in my opinion (for example things like $1, $2, ... are way too specific to be in a language's core for example).

I want to eliminate keywords and hardcoded things wherever possible, if possible to the point where control structures are just functions too.

Property Access

You can access an objects raw properties with the ! symbol:

object!value      # obtain value of object
object!method     # obtain method of object

Methods can be bound with the . symbol:

object.method     # obtain method of object (bound to object)

this will return another function that accepts one parameter less and is bound to object instead.

Calling

You can invoke functions with the ! symbol:

method!
method! 1, 2, 3

Together with bound/unbound property access you can do various things:

object = {}
def object.trace a, b, c  # => function(3)
  return a, b, c
end

object.trace              # => function(2)
object!trace              # => function(3)

object.trace!             # => <object>, nil, nil
object.trace! 1, 2        # => <object>, 1, 2

object!trace!             # => nil, nil, nil
object!trace! 1, 2        # => 1, 2, nil

a = object.trace 1, 2     # => function(0)
b = object!trace 1, 2     # => function(1)

a!                        # => <object>, 1, 2
b!                        # => 1, 2, nil
b! 3                      # => 1, 2, 3

Blocks

Blocks start with > and end with end:

do
  print! "hello"
end

They can accept parmeters after the > sign:

print_block = >a, b
  print! a, b
end

Blocks can be passed as parameters (as lambdas):

for 1, 4, >a
  print! a
end

Single lines can also be passed as blocks:

just_like_if = <, condition, block
  if condition, <
    block!
  end
end

print! "value was true!" < kind_of_if value

This will: 3. bind value to kind_of_if 2. build a Block from `print! "value was true!"

1. invoke the bound kind_of_if with the Block as a parameter.

It is synonymous to this piece of code:

kind_of_if! value, <
  print! "value was true!"
end

Single-line Block literals can also accept parameters:

print! a, b <a, b for 1, 4