Rol Showoff

rol.rol

// Rol: a language transpiled to Lua for all you Lua syntax haters
// Overall the language is quite C-like
print("Hello, World!")

// Semicolons are not required, but can be used
print("Semi");print("colon")

// Idk about variable syntax, is similar to Kotlin
var a: Int = 1

// Rol has type inference
var a = 1

// There is also a dynamic type
var a: dyn = 1

// Blocks are delimited by braces
if (a == 1) {
    print("a is 1")
} else {
    print("a is not 1")
}

// We've got both C and Python style loops
for (var i = 1; i < 5; i++) {
    print(i)
}

for (i: Int in Range(5)) {
    print(i)
}

// Functions are fun
fun hello(times: Int): String {
    return "Hello" * times
}

// 'extern' prevents name mangling for Lua interop
// All parameters are dyn by default in extern functions
// 'is' gives it an alias (becuase often the code that uses this is named the same)
extern print(obj) is luaPrint

// OOP support is not much, just structs
struct Complex {
    var re: Int
    var im: Int

    // Constructors are supported
    init(this: Complex, re: Int) {
        this.re = re
        this.im = 0
    }
}

var c = new Complex(1, 0)
var r = new Complex(1)

// Instance methods are just sugar
// It also allows adding methods on unowned structs
instance fun add(this: Complex, other: Complex): Complex {
    return new Complex(this.re + other.re, this.im + other.im)
}

var res = c.add(r)