On Wednesday, 24 December 2014 at 17:41:09 UTC, ketmar via
Digitalmars-d-learn wrote:
On Wed, 24 Dec 2014 17:05:45 +0000
Meta via Digitalmars-d-learn
<[email protected]> wrote:
So `if (isSet!bit1)` becomes `if (cast(bool)(embeddedTest.bits
& bit1)`. That doesn't work, however. I get an error message
saying "need 'this' for 'bits' of type 'int'". Is there a way
to make this work, or am I stuck with the uglier mixin at the
usage site?
i don't think that you can cheat like this. ;-)
templates aren't macros, and `mixin` inside the template works
immediately. i.e. it's trying to *execute* the mixined code in
compile time. so your template with `mixin` in it tries to check
`embedded.bits` in *compile* time, and then complains about
missing
'this', as it should.
i don't think that you can do c-like macros in D.
Hmm, I confused myself over when the expression is interpreted. I
got it into my head that the template expansion would somehow
delay interpretation of the expression so it could be picked up
at runtime, but of course `enum` forces it to be CTFE'd.
