Isn't `each` too much of a good thing?

12345swordy alexanderheistermann at
Fri Sep 18 16:21:47 UTC 2020

On Friday, 18 September 2020 at 15:22:58 UTC, H. S. Teoh wrote:
> On Fri, Sep 18, 2020 at 02:55:39PM +0000, 12345swordy via 
> Digitalmars-d wrote:
>> On Thursday, 17 September 2020 at 21:03:08 UTC, H. S. Teoh 
>> wrote:
>> > Yeah, implicit is bad.  I used to be a fan of implicit 
>> > things, because of the convenience... but more and more, 
>> > with more experience, I'm starting to be convinced that 
>> > explicit is always better -- for readability and 
>> > maintainability. Too many layers of implicit things, and the 
>> > code becomes obscure, hard to read, or easy to *wrongly* 
>> > read, and consequently fragile.
> [...]
>> By implicit I am assuming your talking about c++ here correct?
> I'm speaking in general.  It applies to any language, really.

Not true, other languages implement implicit conversions in 
different ways. Seriously what languages are you referring here?

> [...]
>> The main case for it is writing:
>> T t = a;
>> Instead of:
>> T t = (t)a
>> That the main benefit of implicit conversion that we should be 
>> focusing on.
> Just write:
> 	auto t = T(a);
> Mission accomplished, no need for implicit conversion, and it's 
> clear exactly what's going on.

You are making assertions that you can write:
           auto t = T(a);

That is not necessarily the case.

>... future readers of the code know exactly what conversions are 
> place and how.
We have a solution to that already it called comments.

>  When there are too many implicit conversions,

What exactly do you mean by this? The implicit conversions that I 
have in mind is that implicit conversions happen once and only 
once per statement.

> the code may look better superficially, but actually it may be 
> hiding inefficient implicit conversions,

What do you mean by "Inefficient" here? That sounds like an 
implementation issue rather than a casting issue.

> or it may look like it's doing something but it's actually 
> doing something else because of the implicit conversions.

That why comments are there for.

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