Worst ideas/features in programming languages? (page 28)

On Tuesday, 16 November 2021 at 02:14:22 UTC, Timon Gehr wrote: > On 15.11.21 09:01, Arjan wrote: >> >>> [...] >> >> Just WOW. >> >> What would be needed to get you working on this again? > > Some reassurance that it won't be shot down for stupid reasons would go a long way. For `static foreach`, the desired semantics were clear to Walter and Andrei from the start and they really wanted that feature in DMD, so that the DIP process went pretty smoothly. I am not feeling any similar excitement for tuples, even though it's the most wanted feature among forum readers according to the state of D 2018 survey... I just don't have the time and energy required for week-long forum debates anymore. I don't see any good reason to shut it down, never mind stupid reasons.

On 11/23/21 10:09 AM, bauss wrote: > On Tuesday, 23 November 2021 at 07:55:45 UTC, Timon Gehr wrote: >> On 12.10.21 23:38, Timon Gehr wrote: >>>> * Features you'd like to see in D >> >> Another thing I have sometimes wished for, but forgot to include: >> >> - package and module templates > > What do you mean by that? > > Something like this? Or? > > ```d > module main; > > import a!5; > > void main() > { > auto foo = new Foo; > foo.field4 = 10; > } > ``` > > ```d > module a(int fieldCount); > > import std.string : format; > > class Foo > { > static foreach (i; 0 .. fieldCount) > { > mixin(format("int field%d", i)); > } > } > ``` Yes, something like this. Thanks for clarifying! This is a module template, I am not sure what's the best way to parameterize an entire package, maybe the declaration should be in every file like this: module package_(T).a;

On Tuesday, 23 November 2021 at 09:09:03 UTC, bauss wrote: > On Tuesday, 23 November 2021 at 07:55:45 UTC, Timon Gehr wrote: >> On 12.10.21 23:38, Timon Gehr wrote: >>>> * Features you'd like to see in D >> >> Another thing I have sometimes wished for, but forgot to include: >> >> - package and module templates > > What do you mean by that? > > Something like this? Or? > > ```d > module main; > > import a!5; > > void main() > { > auto foo = new Foo; > foo.field4 = 10; > } > ``` > > ```d > module a(int fieldCount); > > import std.string : format; > > class Foo > { > static foreach (i; 0 .. fieldCount) > { > mixin(format("int field%d", i)); > } > } > ``` I think that is what he means. template modules are something I have thought about, it's a simple addition but I fear they might not be advisable in the long run. Unfortunately I cannot really put my finger onto why that might be. I have a vague sense that this feature would lead to un-synchronized changes which are meant to be synchronized.

November 23, 2021

Re: Worst ideas/features in programming languages?

Posted by arco
in reply to Atila Neves

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arco

Posted in reply to Atila Neves

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On Tuesday, 9 November 2021 at 11:37:49 UTC, Atila Neves wrote:

On Monday, 8 November 2021 at 14:23:15 UTC, Ola Fosheim Grøstad wrote:

On Monday, 8 November 2021 at 14:08:32 UTC, Atila Neves wrote:

I thought Rust error handling wasn't easy by default until they added the ? operator, at which point it became like exceptions but better.

Looks like syntactical sugar to me, but I am no Rust expert.

Correct, but then again, anything other than machine code is syntatical sugar. So is throw new Exception("oh noes");

It means you now loose context

I don't see how.

and how do you log?

The same way in pretty much any and all programs written that handles exceptions - some outer loop, possibly in the main function.

> >

To me that was always the issue with error handling without exceptions - how to easily just propagate it up (nearly always what one wants to do). I think they nailed it.

For simple situations maybe, but it looks like a hack, as far as I can tell from the docs.

I disagree. To me, it has all the convenience of exceptions with none of the drawbacks.

Actually, Rust also has exceptions but like Go, it's ashamed to admit it:

https://doc.rust-lang.org/std/panic/fn.catch_unwind.html

It's supposed to be used only for unrecoverable runtime errors (panics in Rust parlance).

On 23.11.21 14:41, Atila Neves wrote: > On Tuesday, 16 November 2021 at 02:14:22 UTC, Timon Gehr wrote: >> On 15.11.21 09:01, Arjan wrote: >>> >>>> [...] >>> >>> Just WOW. >>> >>> What would be needed to get you working on this again? >> >> Some reassurance that it won't be shot down for stupid reasons would go a long way. For `static foreach`, the desired semantics were clear to Walter and Andrei from the start and they really wanted that feature in DMD, so that the DIP process went pretty smoothly. I am not feeling any similar excitement for tuples, even though it's the most wanted feature among forum readers according to the state of D 2018 survey... I just don't have the time and energy required for week-long forum debates anymore. > > I don't see any good reason to shut it down, never mind stupid reasons. There are some details such as ABI and sizeof(()). I'll probably get back to this by January. (Some other commitments will have ended by then.)

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