Xlang

It is a for fun interpreter with it's own compiler and VM. Done while reading books on how to make these :).

For the moment it supports:

Variable declaration
Arrays
Strings
Integers
Functions
Passing functions as parameters
Helper methods like len(), push(), pop(), shift(), unshift(), reduce...
HashMaps

What's coming

VM and compiler!!!

Where can I use it?

I deployed an online editor where you can execute code! The code is executed on a server, not in the JavaScript client, so you can use as well the API if you want to create your own online editor.

Web editor: https://boiling-basin-02644.herokuapp.com/ API URL: PUT https://boiling-basin-02644.herokuapp.com/api/v2

Sample body:

{
   "code":"// Variables usually are immutable in Xlang (except for hashmaps)\n// Example: If you declare the variable x, you cant do x = 10 later on, but you can redeclare like let x = 10\n// When you push or pop an array, you wont change directly the array.\n// You will get the new array (with the changes made) but the original wasn't mutated\n\nlet arr = [1, 2, 3];\n\n// This is already done in the standard methods of Xlang, but it's just for showing you how its implemented!\nlet map = fn(x, f) {\n  let iter = fn (arr, result) {\n    if (len(arr) == 0) {\n      return result;\n    }\n    iter(shift(arr), push(result, f(first(arr))));\n  }\n  // In Xlang there are implicit returns! This is the same as saying: return iter(x, []);\n  iter(x, []);\n}\n\n// [2, 3, 4]\nlet what = map(arr, fn (element) { element + 1 });\n// At the end of the file if you want logs call log()...\nlog(what)\n\n// [2, 3, 4, 222]\nlet what = push(what, 222);\nlog(what);\n// [2, 3, 4]\nlet what = pop(what);\nlog(what);\n// [1, 2, 3, 4]\nlet what = unshift(what, 1)\nlog(what)\n// [1000, 2, 3, 4]\nlet what = set(what, 0, 10000)\nlog(what)\n\n// Another function implemented already, but just showing you how it works!\nlet filter = fn(x, condition) {\n  let iter = fn(x, result) {\n    if (len(x) == 0) {\n      return result\n    }\n    // If the condition is met, we pass to the next iteration the updated array, but if not, we keep the same array!\n    iter(shift(x), if (condition(first(x))) { push(result, first(x)) } else { result })\n  }\n  iter(x, [])\n}\n\nlet what = set(what, 0, 10000);\nlet compar = true == \"false\";\n\nlog(what);\n\n// [2, 3, 4]\nlet filtered = filter(what, fn(n) { n < 1000 })\nlog(filtered)"
}

Sample response:

{
   "data":{
      "parse_error":{
         "line":0,
         "messages":null
      },
      "error":{
         "line":15,
         "messages":[
            "Error: Type mismatch: BOOL == STRING"
         ]
      },
      "output":[
         {
            "line":30,
            "messages":[
               "[2,3,4]"
            ]
         },
         {
            "line":33,
            "messages":[
               "[2,3,4,222]"
            ]
         },
         {
            "line":35,
            "messages":[
               "[2,3,4]"
            ]
         },
         {
            "line":37,
            "messages":[
               "[1,2,3,4]"
            ]
         },
         {
            "line":39,
            "messages":[
               "[10000,2,3,4]"
            ]
         }
      ]
   },
   "status":200
}

How does it work?

Check the folder examples for integer, string, array examples... Important points:

Variables are immutable, check examples on how you can play around them :).
At the moment it will only log the logs that you've made if you include log() at the end of the file, YEAH, it sucks, but I'll fix it soon.
Have fun with it!

THIS IS ONLY FOR LEARNING PURPOSES. It isn't supposed to go in production or anything like that.

gabivlj/x-lang

Xlang

What's coming

Where can I use it?

How does it work?