When will you implement cent and ucent?

[Iain Buclaw]

On Thursday, 31 March 2022 at 18:40:52 UTC, deadalnix wrote:
> On Thursday, 31 March 2022 at 06:31:32 UTC, Walter Bright wrote:
>> You see a similar thing when 32 bit compilation does 64 bit 
>> arithmetic:
>>
>> [...]
>>
>> So, yeah, supporting 128 bit arithmetic in the codegen has 
>> significant advantages. 3 multiplies and 2 adds.
>>
>> Having the compiler recognize the `mul` function as a builtin 
>> would enable this code gen for 128 bits.
>
> So now that you just killed the library solution by having the 
> compiler specially recognize it, can we have cent/ucent?
>
> Honestly, I don't care if DMD forward the operation to 
> something in druntime, that would at least allow me to have 
> good codegen on LDC/GDC.

We can do the same as complex numbers here.

enum __c__int128 : core.int128.Cent;
enum __c__uint128 : core.int128.Cent;

Later, when cent/ucent have been dropped as keywords.

alias cent = __c__int128;
alias ucent = __c__uint128;