• Trass3r <mrmocool gmx.de> Nov 15 2009
• Ellery Newcomer <ellery-newcomer utulsa.edu> Nov 15 2009
• Trass3r <mrmocool gmx.de> Nov 16 2009
• Trass3r <mrmocool gmx.de> Nov 16 2009
• Ellery Newcomer <ellery-newcomer utulsa.edu> Nov 16 2009
• "Steven Schveighoffer" <schveiguy yahoo.com> Nov 16 2009

Trass3r <mrmocool gmx.de> writes:

What's the short way to create a multidimensional dynamic array? I 
always forget how to do such stuff due to its strange syntax.

auto array = new ubyte[width*height][numSprites];
doesn't work cause width*height is no "Integer constant expression"

Ellery Newcomer <ellery-newcomer utulsa.edu> writes:

Trass3r wrote:
 What's the short way to create a multidimensional dynamic array? I
 always forget how to do such stuff due to its strange syntax.
 
 auto array = new ubyte[width*height][numSprites];
 doesn't work cause width*height is no "Integer constant expression"


auto array = new ubyte[][](width*height, numSprites);

params might be backwards..

Trass3r <mrmocool gmx.de> writes:

Ellery Newcomer schrieb:
 
 auto array = new ubyte[][](width*height, numSprites);
 
 params might be backwards..


Ah yeah, thanks, that was it.
Don't get the reason for that syntax.

Anyway it should really be described in the language docs.
I'd expect it to be at http://www.digitalmars.com/d/2.0/arrays.html
but "Rectangular Arrays" only explains how to declare them.

Trass3r <mrmocool gmx.de> writes:

Steven Schveighoffer schrieb:
 
 Especially now that static arrays are legitimate value types, new 
 ubyte[1][2] looks to the compiler like a dynamic array of 1 ubyte[1]'s.
 


Ah ok.
Maybe it's a good idea to alter the error message when the compiler 
detects a non-constant expression? Like if you meant to create a dynamic 
array use the []() syntax..

Ellery Newcomer <ellery-newcomer utulsa.edu> writes:

Trass3r wrote:
 Ellery Newcomer schrieb:
 auto array = new ubyte[][](width*height, numSprites);

 params might be backwards..


 Ah yeah, thanks, that was it.
 Don't get the reason for that syntax.
 


I think it has something to do with uniformity inside templates or
something.

alias ubyte[][] Foo;

Foo foo = new Foo(1,2);

still not sure about params.. I should look this up..

"Steven Schveighoffer" <schveiguy yahoo.com> writes:

On Mon, 16 Nov 2009 08:42:28 -0500, Trass3r <mrmocool gmx.de> wrote:

 Ellery Newcomer schrieb:
  auto array = new ubyte[][](width*height, numSprites);
  params might be backwards..


 Ah yeah, thanks, that was it.
 Don't get the reason for that syntax.


Especially now that static arrays are legitimate value types, new  
ubyte[1][2] looks to the compiler like a dynamic array of 1 ubyte[1]'s.

-Steve