Inline Operator from Function.

[bauss]

On Friday, 25 January 2019 at 03:52:23 UTC, Neia Neutuladh wrote:
> On Fri, 25 Jan 2019 03:45:36 +0000, Jonathan Levi wrote:
>> I know this was not an intentional feature of d, but it is a 
>> cool quirk.
>> 
>> If you want to use a function that takes two arguments like a 
>> infix binary operator (similar to the back ticks in Haskell 
>> "`fun`") you can but a "." before and a "=" after.
>> 
>>      c = (a .fun= b);
>
> Consider also:
>
> struct Operator(alias fn) if (Parameters!fn.length == 2)
> {
>     Curry opBinaryRight(string op)(Parameters!fn[0] arg) if (op 
> == "/")
>     {
>         return Curry(arg);
>     }
>     struct Curry
>     {
>         Parameters!fn[0] arg;
>         auto opBinaryRight(string op)(Parameters!fn[1] arg2) if 
> (op == "/")
>         {
>             return fn(arg, arg2);
>         }
>     }
> }
>
> To use it:
>
> alias min = Operator!((a, b) => a < b ? a : b);
> writeln(1 /min/ 2);
>
> Credit to FeepingCreature for inventing this 5-10 years ago.

Now that's a hack I can support.