Text editing [Was: Re: #line decoder]

[Sergey Gromov]

In article <MPG.2347c0e378c6cc6a98970c at news.digitalmars.com>, 
snake.scaly at gmail.com says...
> module rope;
> class Rope(T)
> {
>     typeof(this) opCatAssign(T el)
>     {
>         if (pool >= current.length)
>         {
>             chunks ~= current;
>             current = new T[current.length * 2];
>             pool = 0;
>         }
>         current[pool++] = el;
>         return this;
>     }
>     T[] get()
>     {
>         T[] result;
>         foreach (c; chunks)
>             result ~= c;
>         return result ~ current[0 .. pool];
>     }
>     this()
>     {
>         current = new T[16];
>         pool = 0;
>     }
>     private
>     {
>         T[][] chunks;
>         T[] current;
>         size_t pool;
>     }
> }

The simpler, the better: use Array instead of Rope and get 2.36s:

module array;
class Array(T)
{
    this()
    {
        data = new T[16];
    }
    typeof(this) opCatAssign(T el)
    {
        if (pos == data.length)
            data.length = data.length * 2;
        data[pos++] = el;
        return this;
    }
    T[] get()
    {
        return data[0 .. pos];
    }
    private
    {
        T[] data;
        size_t pos;
    }
}