import System.*
import System.Collections.*
import System.Console.*
import System.Text.*

class CharacterBox {
    private var stored: char

    init(value: char) {
        stored = value
    }

    val Value: char => stored
}

func Describe(value: char) -> string {
    return match value {
        'é' => "Combining character"
        '👨‍👩‍👧‍👦' => "Family"
        _ => "Other"
    }
}

func ShowCharacters(text: Iterable<char>) {
    for character in text {
        WriteLine(character.ToString())
    }
}

func Main() {
    let text = "Aé👨‍👩‍👧‍👦🇸🇪"
    WriteLine(text.Length)
    WriteLine(text.GetScalars().Count)
    WriteLine(text.GetUtf8ByteCount())
    ShowCharacters(text)
    for character in "é" {
        WriteLine(Describe(character))
    }
    let characters: char[] = ['A', 'é', '👨‍👩‍👧‍👦']
    characters[0] = Char.FromString("👍🏽")
    for character in characters {
        WriteLine(character.ToString())
    }
    WriteLine(Describe(characters[2]))
    for scalar in "é".GetScalars() {
        WriteLine((int)scalar)
        if UnicodeScalar.IsLetter(scalar) {
            WriteLine("Letter scalar")
        }
    }
    WriteLine("".Length)
    let initial: char = default(char)
    if initial.Equals('\0') {
        WriteLine("Default NUL")
    }
    let copied = characters[0]
    characters[0] = 'A'
    WriteLine(copied.ToString())
    let box = CharacterBox('é')
    WriteLine(box.Value.ToString())
}