fLang 2

fLang 2 is a programming language with Lisp-like minimalistic syntax, written on Python 3.

Features

• Dynamically typed
• First-class functions
• Simple design
• Pure python 3, without external dependences

Syntax

Comments

Anything, goes after semicolon (;) is ignored by interpreter.

Import

You may use statement "import path" anywhere in code to include some other code into your program. All imports processed it pre-execute step.

Math

  + x y : x + y
  - x y : x - y
  * x y : x * y
  / x y : x / y
  ^ x y : x ** y
  % x y : x mod y
  // x y: x / y (Integer)

Comparsions

  == x y : x == y
  != x y : x != y
  < x y : x < y
  > x y : x > y
  <= x y : x <= y
  >= x y : x >= y
  <> x y : x in y

Logic

  | x y : x or y
  & x y : x and y
  ~ x y : x xor y
  ! x : not x

Console IO

  -> x : print(x)
  <- x : input(x)

List operations

  # x : len(x)
  : x (y z) : x[y:z]
  <: x y : x[:y]
  :> x y : x[y:]
  :+ x y : x + [y]
  +: x y : [y] + x
  :& x y : y.join(x)
  :| x y : x.split(y)

Other

  $ x y : var x = y
  fx x y: lambda x: y
  ~> x : return x
  ? x y z : if x: y else: z
  ... x y : while x: y
  ` x : quote(x)

Functions

You may declare anonymous function

(fx (int:arg1:0 :arg2:0 arg3)
  (~> (+ $arg1 (* $arg2 $arg3)))
)

And use it in-situ

((fx (a) (- (^ $a 3) 1)) 5)

Or assign it to variable and run below

  ($ f (fx (a) (- (^ $a 3) 1)))
  ($ f 10)