Michael Fawcett wrote:
On 12/1/06, Michael Marcin <mmarcin@method-solutions.com> wrote:
If I were to write:
float4 red( 1, 0, 0, 1 ); glColor4fv( (float*)&red ); // make color red glColor4fv( (float*)&red.xxxw() ); // make color white
would this work? I'm guessing red would and white would not.
In another posting it was pointed out that taking the address of a function's return is generally not done for specifically this reason (among others). Should there be any effort to solve this or just leave the swizzle functions as is?
We could put a static assert in the address-of operator for when the underlying types are references...but again, I think there is precedent in coding guidelines to not do:
&red.xxxw(); // taking the address of a temporary
int add(int lhs, int rhs) { int result = lhs + rhs; return result; }
int *p = &add(5, 5);
This has never been expected to work. IMHO I don't think the swizzle functions should be expected to behave any differently.
How about red.xxxw().data()? - Michael Marcin