Re: casting array literals doesn't work as stated in the docs

[bearophile]

Trass3r:

> > What's wrong with just (D2 code):
> > short[] a3 = [5, 3];
> Nothing, but it's just the stripped down example.

I was not answering you, but what Denis Koroskin has written. This thread is 
getting too much confused. And I think I have already seen a very similar 
thread elsewhere.


> auto t = [0xFF, 0x00];
> yields int[]

That's the correct thing. Ints are the default because D2 doesn't defaults to 
optimized multi-precision integral values as CLisp.


> Yet this doesn't work:
> http://codepad.org/P9EZ0dIB

module main;
import std.stdio, std.string;

struct RGBA
{
        ubyte r;
        ubyte g;
        ubyte b;
        ubyte a;
        string toString() { return format("{%s, %s, %s, %s}", r, g, b, a); }
}

static f = cast(RGBA[]) cast(ubyte[])[0x00, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 
0x70];
static g = cast(RGBA[]) cast(ubyte[])[0x00, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 
0x70].dup;
enum h = cast(ubyte[])[0x00, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70].dup;

static h2 = cast(RGBA[]) h.dup;
enum h3 = cast(RGBA[]) h;

void main()
{
        writeln(f);
        writeln(h2);
        writeln(h3);
}


I don't like that code. So, do you want to define an array of 4-bytes structs?
What's wrong with:

// qualified imports
import std.stdio: writeln;
import std.string: format;

struct RGBA {
    ubyte r, g, b, a;
    string toString() { return format("{%s, %s, %s, %s}", r, g, b, a); }
}

// alternative 1:
enum RGBA[] data1 = [{0x00, 0x10, 0x20, 0x30}, {0x40, 0x50, 0x60, 0x70}];
// alternative 2:
enum RGBA[] data2 = [RGBA(0x00, 0x10, 0x20, 0x30), RGBA(0x40, 0x50, 0x60, 
0x70)];

void main() {
    writeln(data1);
    writeln(data2);
}

Bye,
bearophile