import vector;
import mem;

obj string (Destructable) {
    var data: vector::vector<char>;
    fun construct(): string* {
        data.construct();
        return this;
    }
    fun construct(str: char*): string* {
        data.construct();
        while(*str) {
            data.addEnd(*str);
            str += 1;
        }
        // no null terminator
        return this;
    }
    fun construct(vec: vector::vector<char>): string* {
        data.copy_construct(&vec);
        return this;
    }

    fun copy_construct(old: string*): void {
        data.copy_construct(&old->data)
    }

    fun destruct():void {
        data.destruct()
    }

    fun operator=(str: char*): void {
        destruct();
        construct(str)
    }

    fun operator+(str: char*): string {
        var newStr.construct(str):string
        var ret.construct(data + newStr.data):string
        return ret
    }

    fun operator+=(str: char*): void {
        var newStr.construct(str):string
        data += newStr.data
    }

    fun toCharArray(): char* {
        var out: char* = mem::new<char>(data.size+1);
        for (var i: int = 0; i < data.size; i++;)
            out[i] = data.get(i);
        // null terminator
        out[data.size] = 0
        return out;
    }
};