digitalmars.D - Re: Simple tagged attribute for unions [OT]
- Andrew Wiley (13/38) Nov 19 2010 This isn't really related but it's an idea that I randomly had while rea...
- Bruno Medeiros (11/44) Dec 07 2010 That would effectively be a form of macros, using annotations instead of...
On Fri, Nov 19, 2010 at 5:46 PM, Bruno Medeiros <brunodomedeiros+spam com.gmail> wrote:On 22/10/2010 04:04, Andrei Alexandrescu wrote:This isn't really related but it's an idea that I randomly had while reading that bug report: What if functionality like this could be implemented in mixins rather than compiler-defined annotations? The idea would be that an annotation, when applied to something, would be "instantiated" in some form, allowing it to mixin code somehow. I know that's vague, but it seems like it would have powerful applications for things like ORM libraries and other libraries. On the other hand, annotations go from metadata to something that potentially changes the code you're writing, which may not be a good idea. Disclaimer: This is utterly random and you're free to tell me it's foolishness.On 10/21/2010 08:41 PM, bearophile wrote:How did I miss that! It's bearophile's best comment ever! :DI have suggested yet another attribute, tagged: http://d.puremagic.com/issues/show_bug.cgi?id=5097 Bye, bearophileAnd almost exactly six hours ago: On the other hand, currently there are many D2 features that areunfinished and buggy, so adding even more stuff is not a good idea. And I think named arguments are a purely additive change. So Walter may add them later when the current features are implemented well enough. Currently it's much more important to focus on eventually needed non-additive changes instead.Hope you agree with yourself :o). Andrei
Nov 19 2010
On 20/11/2010 00:10, Andrew Wiley wrote:On Fri, Nov 19, 2010 at 5:46 PM, Bruno Medeiros <brunodomedeiros+spam com.gmail> wrote: On 22/10/2010 04:04, Andrei Alexandrescu wrote: On 10/21/2010 08:41 PM, bearophile wrote: I have suggested yet another attribute, tagged: http://d.puremagic.com/issues/show_bug.cgi?id=5097 Bye, bearophile And almost exactly six hours ago: On the other hand, currently there are many D2 features that are unfinished and buggy, so adding even more stuff is not a good idea. And I think named arguments are a purely additive change. So Walter may add them later when the current features are implemented well enough. Currently it's much more important to focus on eventually needed non-additive changes instead. Hope you agree with yourself :o). Andrei How did I miss that! It's bearophile's best comment ever! :D This isn't really related but it's an idea that I randomly had while reading that bug report: What if functionality like this could be implemented in mixins rather than compiler-defined annotations? The idea would be that an annotation, when applied to something, would be "instantiated" in some form, allowing it to mixin code somehow. I know that's vague, but it seems like it would have powerful applications for things like ORM libraries and other libraries. On the other hand, annotations go from metadata to something that potentially changes the code you're writing, which may not be a good idea. Disclaimer: This is utterly random and you're free to tell me it's foolishness.That would effectively be a form of macros, using annotations instead of function-call-like syntax. In the earlier stages of D (D1) there were plans to add at some point some form of macros (AST macros), working kind like implicit mixins. But with all the D2 stuff it got pushed way back in the new features wishlist (informally speaking, to D3). The general interest for that feature might have waned. I personally was never too keen on that, in fact I was (and still am) a bit apprehensive about such a feature. -- Bruno Medeiros - Software Engineer
Dec 07 2010