Open Methods: From C++ to D

[EntangledQuanta via Digitalmars-d-announce]

On Wednesday, 30 August 2017 at 18:16:47 UTC, jmh530 wrote:
> On Wednesday, 30 August 2017 at 15:59:32 UTC, Jean-Louis Leroy 
> wrote:
>> What happens here is that kick(Animal) is shadowed by 
>> kick(Dog). kick(Animal) is a method but it appears to the user 
>> and the compiler as an ordinary function - which is generally 
>> good. As such it is eligible for UFCS. I would not recommend 
>> this sort of coding, but it's everyone's choice, methods or 
>> not.
>>
>> Likewise, methods can be overloaded (like here 
>> https://github.com/jll63/openmethods.d/blob/1.0.0-rc.1/examples/matrix/source/matrix.d#L12).
>>
>> A current limitation is that default arguments are not 
>> supported (yet), although I think it's just a matter of 
>> putting the effort in.
>>
>> UFCS interacts nicely with methods because you can say 
>> a.plus(b) even if 'plus' is an open method.
>
> I can submit this as an issue on the github page, but I figured 
> I'd mention it here in case there was some easy fix.
>
> I tried installing the latest release from github. Compiling 
> (Windows 7 on DMD with default options) the simple program below
>
> import openmethods;
> mixin(registerMethods);
>
> void main()
> {
> }
>
> gives me the errors:
>
> ..\..\dubFolder\openmethods.d-1.0.0-rc.1\source\openmethods.d(970,21): Error: ca
> nnot implicitly convert expression h of type ulong to uint
> ..\..\dubFolder\openmethods.d-1.0.0-rc.1\source\openmethods.d(1076,34): Error: c
> annot implicitly convert expression dim of type ulong to uint
> ..\..\dubFolder\openmethods.d-1.0.0-rc.1\source\openmethods.d(1177,23): Error: c
> annot implicitly convert expression h of type ulong to uint
> dmd failed with exit code 1.
>
> The error at line 1076 can be fixed by changing the type of dim 
> in the function to size_t. I couldn't fix the other errors. I 
> tried having the hash function return size_t also, but that 
> just causes other problems.

I was getting similar errors and simply added a cast(size_t)[used 
in the indexing, as he used ulongs for indexes rather than 
size_t] to all those you mention. After that I got more errors 
that I can't recall now but was much more cryptic. I did 
updateMethods and added the mixin but things wern't working so I 
gave up. Seems like a nice idea, although, the downside that I 
see is one doesn't get encapsulation.