Jsl

Just a stack based language

Build

cargo build

./target/debug/jsl source.jsl

Functions

Functions can defined with fn keyword, for example

import std

fn callme -> {
  str Helloworld printstr
}

call callme

output:

HelloWorld

also you can specify a arguments of a function after name of function for example:

fn callme x y z -> {
  x put
  y put
  z put
}

1 2 3 call callme

output:

3
2
1

Object

You can define object in Jsl with object keyword

example:

object {
    x = 1
    y = 2
}

This will push the pointer to the object to stack

also you can get the property of object with get keyword like:

get x

Let

let is like global variables, unlike macros let cant hold expression only holds value float64

usage:

10 let x

x put

this will return 10

You can set let value with set keyword

for example:

30 set x

x put

this will return 30

Strings

str HelloWorld put

result will be

HelloWorld

Boolean

true -> will push 1 to stack false -> will push 0 to stack

Eq & NotEq

for Eq if two last elements in stack is equal , this will push bool to stack

1 2 eq put

will return 0

For not equal

1 2 eq put

will return 1

Then

then runs function if the top of stack is true example:

1 1 eq then {
    1 put
}

Times

times is a keyword like for loops

times will pop the top of stack and do body of times x times

example:

3 times {
  1 print
}

will return:

1
1
1

Import

example:

import lib.jsl

call test

will return:

HelloWorld

lib.jsl:

fn test -> {
  str HelloWorld putstr
}

Resource

Reverse Polish notation. (2023, August 14). In Wikipedia. https://en.wikipedia.org/wiki/Reverse_Polish_notation

Stack-oriented programming. (2023, July 30). In Wikipedia. https://en.wikipedia.org/wiki/Stack-oriented_programming