iterator_string.ko

// String character iterator example.
// Phase 50 feature — iterate over String codepoints using .chars().

module iterator_string {
    meta {
        version: "1.0.0"
        purpose: "Demonstrates String.chars() iterator"
        author: "Kodo Team"
    }

    fn count_chars(s: String) -> Int {
        let iter: Int = s.chars()
        let mut count: Int = 0
        while string_chars_advance(iter) == 1 {
            count = count + 1
        }
        string_chars_free(iter)
        return count
    }

    fn sum_codepoints(s: String) -> Int {
        let iter: Int = s.chars()
        let mut total: Int = 0
        while string_chars_advance(iter) == 1 {
            let cp: Int = string_chars_value(iter)
            total = total + cp
        }
        string_chars_free(iter)
        return total
    }

    fn main() -> Int {
        let msg: String = "hello"
        let char_count: Int = count_chars(msg)
        print_int(char_count)

        let total: Int = sum_codepoints("ABC")
        print_int(total)

        return 0
    }
}