What is the reasoning behind the lack of conversions when passing parameters

[Atila Neves]

On Saturday, 3 February 2024 at 03:19:00 UTC, Walter Bright wrote:
> C++ has this, implicit conversion of structs. It looks great 
> with simple cases. However, as overloading gets more complex, 
> it becomes a source of mass confusion. I've had many C++ 
> programmers tell me that nobody actually knows how C++ 
> overloading works - they just try random things until they get 
> the result they want. There was a lot of talk in the 90s about 
> implicit conversion being a mistake, but by then it was too 
> late and C++ has had to learn to live with it.
>
> It's in that class of features that inevitably lead to 
> incomprehensible code.
>
> I tried to make overloading in D much simpler, but it's still 
> overly complex.
>
> Let's not dig that cat out of the pet semetary.

It got bad enough in C++ that the guideline is now to use 
explicit on single parameter constructors: 
https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#Rc-explicit