Why do C++ programmers are not interested in D?

Gregor Mückl gregormueckl at gmx.de
Wed Nov 27 15:47:53 UTC 2019

On Saturday, 23 November 2019 at 19:35:55 UTC, Mark wrote:
> I can perfectly imagine a C# programmer (even library author) 
> saying "I love generics, extension methods and lambda 
> expressions, but that's good enough for me. I can live without 
> `static if` and a full CTFE engine". That said, it's not like 
> I've done a survey among the C#, Java, C++, Go, Rust, or Swift 
> crowd. Maybe most programmers (or at least library authors) in 
> these languages *do* wish for D-level MP support in their 
> language. But that's a question that needs to be investigated; 
> the answer is not obvious at all IMO.

C# and Java have extremely powerful runtime reflection and code 
generation capabilities. It may not be well known, but there are 
frameworks out there that look at classes in other libraries at 
runtime and dynamically generate new bytecode to wrap those for 
various purposes. Some versions of JBoss did this to inject 
authorization checks in EJBs: they'd create a new anonymous 
implementation of the EJB's interface that wraps every function 
with such a test that forwards to the actual EJB implementation.

In most cases, however, you get away without explicit code 
generation. You can quite easily call unknown methods through 
reflection or query and change the values of variables. All of 
this can also ignore all access specifiers as it bypasses the 

These features are really, really powerful cannons. Also, nothing 
prevents you from aiming them at your own feet. It's a good thing 
that they are generally used very sparingly (except when they 

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