On Tue, 28 Apr 2009 05:06:23 -0400, bearophile <[email protected]>
wrote:
bearophile:
struct Vec(T=float, size_t N=3) {
static assert(N > 0);
Sorry. Better to use:
struct Vec(T=float, int N=3) {
static assert(N > 0);
From experience using D I have seen that using unsigned types is very
unsafe in the current D language. In Delphi using unsigned types
increases safety, in D actually decreases it. So in D it's better avoid
unsigned type every time they aren't strictly necessary.
Bye,
bearophile
Well, in this case, N=-1 is both a compile time constant and doesn't
compile (static arrays have a max size of 16kb).
Anyways, here's an alternate version:
import std.conv: text;
struct _Vec(T:U[N],U,size_t N) {
T _data;
alias _data this;
string toString() { return text(_data); }
}
_Vec!(T) Vec(T)(T val)
if( is(_Vec!(T)) )
{
_Vec!(T) r = val;
return r;
}
Which simplifies use:
auto foo(T,size_t N)(T[N] v) {
// do stuff with v
return Vec(v);
}
although functions as array parameters doesn't allow setters, i.e.:
pos.x; // okay
pos.x = 5; // error
