Sloth

Sloth is a simple interpeter written in Golang. This is hoby project for learning golang. I converted this to WebAssembly :) program, now i can run it on browser.

Syntax

This is a simple syntax for sloth. currently, sloth works with following syntax in repl.

Variable declaration in sloth is like this:

var name = value

1. Addition of two numbers

>>> var a = 10
>>> var b = 20
>>> a + b
30

Note: Sloth support all basic arithmetic operations except >= and <=.

2. Function

>>> var add = fun(a,b) { return a + b};
>>> add(1,2)
3

3. If else statement

>>> var isten = fun(a) { if(a == 10) { return "yes" } else { return "no"} }
>>> isten(10)
yes
>>> isten(11)
no

4. String concatenation

>>> var say = "hello" + " " + "world"
>>> say
hello world
>>> var say = concat("hello", "world")
>>> say
hello world

5. Built-in functions

• len(a): returns length of array
• concat(a,b): concatenates two strings

6. Array

>>> var a = [1,2 + 2,3]
>>> a[0]
1
>>> a[1]
4

Build

1. WASM build

$ cd wasm
$ $ENV:GOOS="js"
$ $ENV:GOARCH="wasm" 
$ go build -o ../build/sloth.wasm

Btw

I wrote this project based on Thorsten Ball's Writing an Interpreter in Go.