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From: Thiago Adams <thiago.adams@gmail.com>
Newsgroups: comp.lang.c
Subject: Re: constexpr keyword is unnecessary
Date: Tue, 15 Oct 2024 10:11:48 -0300
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On 15/10/2024 10:01, Bart wrote:
> On 15/10/2024 12:41, Bonita Montero wrote:
>> Am 15.10.2024 um 05:30 schrieb DFS:
>>> On 10/13/2024 6:51 AM, Bonita Montero wrote:
>>>> Am 12.10.2024 um 23:37 schrieb Thiago Adams:
>>>>
>>>>> If you are afraid your constant is not constant expression put a 
>>>>> static_assert. Then remove.
>>>>
>>>> This is unnecessary work if you have constexpr.
>>>>
>>>>> (C++ is a TOTAL mess. const in C++ already could be used n constant 
>>>>> expression)
>>>>
>>>> C++ is five to ten times less work for the same problem.
>>>
>>>
>>> How do you measure "work'?
>>
>> In lines of code. Imagine you would specialize a container like
>> unordered_map by hand in C. That would be days of work. In C++
>> it's one line of code and you get nearly optimal performance.
>> Or just think about what an emplace_back on a vector of strings
>> all does; if the capacity isn't sufficient a doubled vector is
>> allocated (libstdc++, libc++), all objects are moved there and
>> a new item is emplaced at the end. That's one line of code, but
>> in C that's a half day's work.
>>
> 
> 
> Sure, because every time you start a new C app, you're starting from zero.
> 
> There are no existing libraries to use. No online examples to use as 
> templates. There are no examples of hashtables or growable arrays that 
> you've implemented over decades of your own work to draw from.
> 
> There is NOTHING.
> 
> In reality it isn't like that.
> 
> Use of C++ does have the advantage when posting bits of code in on-line 
> forums, since there are a much larger number of /standard/ libraries 
> that someone running your code will have access to in their 
> installation, if the code fragment happens to use them.
> 
> Posted C code using a non-standard library would be problematical. 
> That's probably why C code that use a hash-map, for example, may need to 
> come with its implementation so it may appear to have a higher line count.
> 


I think C could be improved a lot with something like ChatGPT to create 
parametrized containers.

I was planing to create something (not as advanced of course) but 
something I could just write "create a vector of int" "create map of 
strings to int" , "create single linked list" etc.