• MarisaLovesUsAll (33/33) Mar 22 2014 Hi! I need to use array of bits in my custom class. I tried to
• bearophile (16/33) Mar 22 2014 To me this program compiles:
• MarisaLovesUsAll (7/43) Mar 23 2014 Thanks for help! It was static(?) ctor, I had been trying to

"MarisaLovesUsAll" <marusya 2ch.hk> writes:

Hi! I need to use array of bits in my custom class. I tried to
add std.bitmanip.BitArray as field, but got a strange error. What
am I doing wrong?

import std.bitmanip;
class Scene
{
      BitArray collisionMap;
      this(int w, int h)
      {
          collisionMap.init([0,0,0]);
      }
}

C:\D\dmd2\windows\bin\..\..\src\phobos\std\bitmanip.d
line 606
Error: btr cannot be interpreted at compile time, because it has
no available source code


If I use collisionMap.length(w*h), I get:

C:\D\dmd2\windows\bin\..\..\src\phobos\std\bitmanip.d
line 554
Error: non-constant expression [0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u,


And if I use BitArray in default ctor ( this() ), or in other
function in class, or in main function, all is OK. But I need
only ctor with arguments that initialize the BitArray with '0'
and sets 'w*h' length.

DMD version 2.065.0

Sorry for bad English.

"bearophile" <bearophileHUGS lycos.com> writes:

MarisaLovesUsAll:

 Hi! I need to use array of bits in my custom class. I tried to
 add std.bitmanip.BitArray as field, but got a strange error. 
 What
 am I doing wrong?

 import std.bitmanip;
 class Scene
 {
      BitArray collisionMap;
      this(int w, int h)
      {
          collisionMap.init([0,0,0]);
      }
 }

 C:\D\dmd2\windows\bin\..\..\src\phobos\std\bitmanip.d
 line 606
 Error: btr cannot be interpreted at compile time, because it has
 no available source code

To me this program compiles:


import std.bitmanip;

class Scene {
      BitArray collisionMap;
      this(int w, int h) {
          collisionMap.init([0,0,0]);
      }
}
void main() {}


Errors like "btr cannot be interpreted at compile time" mean that 
you are trying to run at compile-time something that can only run 
at run-time. So are you using enums or static immutables or 
static constructors or something like that?

Bye,
bearophile

"MarisaLovesUsAll" <marusya 2ch.hk> writes:

On Saturday, 22 March 2014 at 10:02:39 UTC, bearophile wrote:
 MarisaLovesUsAll:

 Hi! I need to use array of bits in my custom class. I tried to
 add std.bitmanip.BitArray as field, but got a strange error. 
 What
 am I doing wrong?

 import std.bitmanip;
 class Scene
 {
     BitArray collisionMap;
     this(int w, int h)
     {
         collisionMap.init([0,0,0]);
     }
 }

 C:\D\dmd2\windows\bin\..\..\src\phobos\std\bitmanip.d
 line 606
 Error: btr cannot be interpreted at compile time, because it 
 has
 no available source code

 To me this program compiles:


 import std.bitmanip;

 class Scene {
      BitArray collisionMap;
      this(int w, int h) {
          collisionMap.init([0,0,0]);
      }
 }
 void main() {}


 Errors like "btr cannot be interpreted at compile time" mean 
 that you are trying to run at compile-time something that can 
 only run at run-time. So are you using enums or static 
 immutables or static constructors or something like that?

 Bye,
 bearophile

Thanks for help! It was static(?) ctor, I had been trying to 
create Scene from another class via
class App
{
     Scene scene = new Scene(13,10);
}