Trass3r <u...@known.com> wrote:
I also wanted to allow for swizzled setters, but apparently that's
currently not possible[1].
[1]: http://d.puremagic.com/issues/show_bug.cgi?id=620
What a pity!
Actually, after a bit of hacking, I have found a way:
// new helper function
static private bool noCharsRepeated( string s )
{
foreach ( i, e1; s[0..$-1])
foreach ( e2; s[i+1..$] )
if ( e1 == e2 )
return false;
return true;
}
/// swizzling
template opDispatch( string n ) {
@property Vector!(T,n.length) opDispatch( U... )( U args )
if (allCharsValid(n,"xyzw"[0..dim]) && (U.length == 0 || (U.length == 1
&& is(U[0] == Vector!(T,n.length)) && noCharsRepeated(n))))
{
static if ( U.length == 1 ) {
static if ( n.length >= 1 )
cell[n[0]-'x'] = args[0].cell[0];
static if ( n.length >= 2 )
cell[n[1]-'x'] = args[0].cell[1];
static if ( n.length >= 3 )
cell[n[2]-'x'] = args[0].cell[2];
static if ( n.length >= 4 )
cell[n[3]-'x'] = args[0].cell[3];
}
static if (n.length == 2) return
Vector!(T,n.length)(cell[n[0]-'x'], cell[n[1]-'x']);
static if (n.length == 3) return
Vector!(T,n.length)(cell[n[0]-'x'], cell[n[1]-'x'],
cell[n[2]-'x']);
static if (n.length == 4) return
Vector!(T,n.length)(cell[n[0]-'x'], cell[n[1]-'x'], cell[n[2]-'x'],
cell[n[3]-'x']);
}
}
The signature might not exactly be clean, but it works.
--
Simen
