SultanC
عEN
  1. Home
  2. Examples
  3. Functions

Anonymous functions capture surrounding values and can be returned

functions/closures.sn
// Anonymous functions capture surrounding values and can be returned.
import std.io.println;
import std.text.number;

def make_adder(amount: int): fn(int): int {
    return fn(value: int): int -> value + amount;
}

def main(): int {
    let add_ten: fn(int): int = make_adder(10);
    let add_two: fn(int): int = make_adder(2);
    let curry: fn(int): fn(int): int = fn(a: int): fn(int): int -> fn(b: int): int -> a * b;
    let triple: fn(int): int = curry(3);
    println(int_to_text(add_ten(5)));
    println(int_to_text(add_two(add_ten(30))));
    println(int_to_text(triple(14)));
    return 0;
}

Run it

With the interpreter, without compiling:

./build/sultanc run examples/en/functions/closures.sn

Or compile it to an executable:

./build/sultanc examples/en/functions/closures.sn -o build/example && ./build/example

Source on GitHub   All examples