An esoteric programming language putty

Quick Examples:

• Hello World: 10 "Hello, World!%c" P;;
• FizzBuzz:

{M
    1=i
    (i 100 <=?
        (i 15 % 0 ==?
            "FizzBuzz" P;
        :(i 3 % 0 ==?
            "Fizz" P;
        :(i 5 % 0 ==?
            "Buzz" P;
        :
            i "%d" P;;
        )))
        10 "%c" P;;
        i++;
    @)
}
M

Swizzle is an interpreted language built around a very simple core loop that does two things, look up functions and execute them. It doesn't need much to bootstrap itself into a useful substrate, and almost everything is completely modular and optional.

Swizzle supports:

• inline strings using quotes: "..."
• numbers, both single digit, and multi-digit: 1, 9001
• single-letter function definitions: {F <function contents> } (in this case, F is the function's name)
• single-letter variables: i
• printf, dlsym, and exit: P, D, E
• basic math: +, -, *, /, %
• conditionals and loops: (1 1 == ? <true> : <false> @)
@ indicates a loop back to the nearest same-level (, ? is just a standard
  c-like ternary operator, branching based on the value on the top of the stack