Open Methods: From C++ to D

[jmh530 via Digitalmars-d-announce]

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.