On Fri, May 30, 2014 at 7:28 PM, Ali Çehreli <digitalmars-d-learn@puremagic.com> wrote: > On 05/30/2014 08:30 AM, Russel Winder via Digitalmars-d-learn wrote: > >> enum double p0 = 0.0045; > > As others have already said, p0 is a manifest constant. Interestingly, it > can be thought of like a C macro, being pasted inside source code. > > Avoid enums for arrays and associative arrays as they are hidden performance > sinks. The constant gets regenerated at runtime every time it is used in an > expression.
I guess that, in an ideal world, immutable variables could be use at compile-time (template arguments, etc). We could then ditch 'enums-as-manifest-constants'.The best of both worlds. But what we have here is already quite good!
