On Sunday, 13 September 2015 at 17:34:11 UTC, BBasile wrote:
On Sunday, 13 September 2015 at 17:24:20 UTC, Laeeth Isharc
wrote:
On Sunday, 13 September 2015 at 17:09:57 UTC, wobbles wrote:
Use __traits(compiles, date.second)?
Thanks.
This works:
static if (__traits(compiles, { T bar; bar.date.hour;}))
pragma(msg,"hour");
else
pragma(msg,"nohour");
can't you use 'hasMember' (either with __traits() or
std.traits.hasMember)? It's more idiomatic than checking if
it's compilable.
I'll check again in a bit, but I seem to recall hasMember didn't
work. I would like to get the type of a member of a type, and I
think hasMember!(T.bar.date","hour") didn't work for that.
Possibly it does work and I messed it up somehow, or it doesn't
work and there is a more elegant way.
Someone ought to write a tutorial showing how to use the good
stuff we have to solve real problems. Eg an annotated babysteps
version of Andrei's allocator talk. I can't do it as too much on
my plate.