Re: This Week in D #37 - forum tutorials and tip on using UDAs
On 2015-09-28 15:03, Adam D. Ruppe wrote: The tip here is one I've been talking about on irc a little and decided to write up this time. Using a mixin template to hold the source code of a thing to be transformed is something I think is kinda cool though I haven't actually used it in a real project yet. (Actually, I've barely used UDAs in the real world at all yet. I was so excited for them when they were new, but it took so long to materialize that I found other ways to do my stuff and now haven't transitioned!) This looks pretty cool. Unfortunately the original code needs to be contained inside a template :( . -- /Jacob Carlborg
Re: This Week in D #37 - forum tutorials and tip on using UDAs
On 2015-09-29 14:10, Adam D. Ruppe wrote:
Though, I just had an idea on how that might be simplified don't
recreate them, just alias them!
So, conceptually, you'd do something like:
template transformer(alias member) {
static if(hasUDA!(member, thing))
mixin(transformed_version_of_member());
else
alias member = member;
}
mixin staticMap!(AllMembers!impl_module, transformer);
This looks even more interesting :)
--
/Jacob Carlborg
Re: This Week in D #37 - forum tutorials and tip on using UDAs
On Tuesday, 29 September 2015 at 07:09:35 UTC, Jacob Carlborg
wrote:
This looks pretty cool. Unfortunately the original code needs
to be contained inside a template :( .
Yeah. You could put it in a module too (my original plan was to
write about "module mything_impl; code here" and "module mything;
mixin magic_from_mything_impl;" but there's a bit more difficulty
with that and forwarding all members you don't want to transform.
Though, I just had an idea on how that might be simplified
don't recreate them, just alias them!
So, conceptually, you'd do something like:
template transformer(alias member) {
static if(hasUDA!(member, thing))
mixin(transformed_version_of_member());
else
alias member = member;
}
mixin staticMap!(AllMembers!impl_module, transformer);
So you bring in the original thing via alias in much the same way
I brought it in via template mixin, then do the rest basically
the same.
That *should* work and not even be all that much more code. Then
you don't need to wrap anymore. Though it does still need to be
in a separate something, whether input module or struct, from the
output.
Re: This Week in D #37 - forum tutorials and tip on using UDAs
On Monday, 28 September 2015 at 13:03:50 UTC, Adam D. Ruppe wrote: This Week in #Dlang - new bugfix release, Windows driver, Azure+vibe tutorial, tip on uda transformations + mixin templates http://arsdnet.net/this-week-in-d/sep-27.html The tip here is one I've been talking about on irc a little and decided to write up this time. Using a mixin template to hold the source code of a thing to be transformed is something I think is kinda cool though I haven't actually used it in a real project yet. (Actually, I've barely used UDAs in the real world at all yet. I was so excited for them when they were new, but it took so long to materialize that I found other ways to do my stuff and now haven't transitioned!) Really cool trick. I had to run it and look at the output to really understand though! Atila
Re: This Week in D #37 - forum tutorials and tip on using UDAs
On Monday, 28 September 2015 at 13:06:37 UTC, John Colvin wrote: https://github.com/DlangScience/design/blob/master/design.pdf BTW there is a plot thing David Simcha did years ago: http://code.dlang.org/packages/plot2kill I don't know how good it is though, I've never actually used it. That page 6 bit is cool too, nice stuff.
This Week in D #37 - forum tutorials and tip on using UDAs
This Week in #Dlang - new bugfix release, Windows driver, Azure+vibe tutorial, tip on uda transformations + mixin templates http://arsdnet.net/this-week-in-d/sep-27.html The tip here is one I've been talking about on irc a little and decided to write up this time. Using a mixin template to hold the source code of a thing to be transformed is something I think is kinda cool though I haven't actually used it in a real project yet. (Actually, I've barely used UDAs in the real world at all yet. I was so excited for them when they were new, but it took so long to materialize that I found other ways to do my stuff and now haven't transitioned!)
Re: This Week in D #37 - forum tutorials and tip on using UDAs
On Monday, 28 September 2015 at 13:03:50 UTC, Adam D. Ruppe wrote: The tip here is one I've been talking about on irc a little and decided to write up this time. Using a mixin template to hold the source code of a thing to be transformed is something I think is kinda cool though I haven't actually used it in a real project yet. (Actually, I've barely used UDAs in the real world at all yet. I was so excited for them when they were new, but it took so long to materialize that I found other ways to do my stuff and now haven't transitioned!) Somewhat related to this, see page 6 of what I was working on over the weekend: https://github.com/DlangScience/design/blob/master/design.pdf
