Compile-Time Functions - Allocating Memory?

[Ary Borenszweig]

Era Scarecrow a écrit :
>  I'm trying to compose as a test, where i fill a precompiled list of numbers in an array. What step am i missing to make this part work? (I i'm using gdc). it keeps complaining of a non-constant expression. Is there any way to make this work?
> 
> bool []primes = tp(1000);
> 
> bool [] tp( int max )
> {
> 	bool[] tmp = new bool[](max);
> 
> 	for ( int cnt = 2; cnt < max; cnt++ )
> 		tmp[cnt] = isprime( cnt );
> 
> 	return tmp;
> }
> 
> bool isprime( int x )
> {
> 	for ( int cnt = 2; cnt < x; cnt++ )
> 		if ( x % cnt == 0 )
> 			return false;
> 
> 	return true;
> }
> 
>  Era

lol,

Some days ago I was writing the same thing to make a video showing 
Descent hovering over that constant and the primes would appear.

It seems this can't be interpreted:

new bool[](max);

You can't create anything on the heap when doing CTFE (afaik). I did it 
by using a dynamic array:

bool[] tmp;
tmp ~= false;
tmp ~= false;
for ( int cnt = 2; cnt < max; cnt++ )
   tmp ~= isprime( cnt );

And since CTFE seems to not have garbage collection, you might want to 
do "cnt * cnt <= x" instead of "cnt < x" ;-)