🔥👌 littl

A small, procedural/semi-functional language

The language isn’t really all that powerful (I wrote it for a school assignment). We have variables, which we can declare with either var, for normal variables or var! for constants and there is shorthand declaration with the := operator (which doesn’t require a var keyword). We won’t deal with datatypes but rather let JavaScript handle that.

Littl also has C-style comparison and mathematical operators. Values can be returned with the return keyword.

Use it

git clone https://github.com/Azer0s/littl.git
cd littl
make
make run/path/to/file

Basic syntax

Functions

Declared like: functionName argument1 argument2 …​

Example

add x y {
    return x + y
}

Comparison

is, not | Equality

<,⇐,>,>= | Greater/Smaller

For loops

Declared like: for variable in array

Example

arr := {1,2,3,4,5}

for i in arr {
    console.log(i)
}

Counted for loops

Declared like: for variableDeclaration; condition; operation

Example

arr := {1,2,3,4,5}

for var i = 0; i < arr.length; i = i + 1{
    console.log(i)
}

for ;true; {
    console.log("Hello")
}

If condition

Declared like: if condition

Optional: or if

Optional: else

Example

a := 5

if a < 10 {
    console.log("a is smaller than 10")
}
or if a > 21 {
    console.log("a is bigger than 21")
}
else{
  console.log("a is bigger than 10")
}

These statements have C-like blocks (curly brackets).

Since Littl transpiles to JavaScript, one can use JavaScript functions like console.log.

A recursive fibonacci sequence would look like so:

fib n {
    if n is 0 or n is 1 {
        return n
    }

    return fib(n-1) + fib(n-2)
}

x := fib(12)

console.log(x)

Since Littl is part functional, every scope, be it if, for or a function scope, can be put into a variable or returned.

count := for i := 0; i not 10; i = i + 1 {
    console.log(i)
}

count()

var! two = 2
twoSmallerThanThree := if two < 3 {
    return true
}

twoSmallerThanThree()

curryAddition := anonymous x {
    return anonymous y {
        return x + y
    }
}

add3 := curryAddition(3)
console.log(add3(2))