Re: multidim array with enum

[Adam D Ruppe via Digitalmars-d-learn]

On Saturday, 18 June 2022 at 17:19:24 UTC, Chris Katko wrote:
I'm having difficulty figuring out exactly what signature D is 
expecting.


BITMAP*[2][DIR] bmps;


I'm actually not sure if that [DIR] is an associative array or 
DIR's base type or a static array of DIR's size.


I *think* it is an assoc array... let's test it using the `in` 
operator:


auto a = DIR.UP in bmps;

That compiled. So this must be an associative array!


Try this instead:

BITMAP*[2][DIR.max] bmps;


That's a static array of directions and I think that's what you 
intended and the other things should work as you want too with 
this.

multidim array with enum

[Chris Katko via Digitalmars-d-learn]

I'm having difficulty figuring out exactly what signature D is 
expecting.


D
enum DIR
{
UP = 0,
DOWN,
LEFT,
RIGHT,  
UPLEFT,
UPRIGHT,
DOWNRIGHT,
DOWNLEFT,
}

BITMAP*[2][DIR] bmps;

// ...

bmps[DIR.UP][0] = nope.
bmps[DIR.UP][0] = new BITMAP *; // nope
bmps[DIR.UP][0] = new BITMAP; // nope
bmps[DIR.UP] = new BITMAP*[2]; // compiles. runtime range 
violation.




I swear this all worked fine when it was just:
D
bmps[DIR] bmps;