Short list with things to finish for D2

[Andrei Alexandrescu]

Travis Boucher wrote:
> bearophile wrote:
>> Andrei Alexandrescu:
>>
>>> * Encode operators by compile-time strings. For example, instead of 
>>> the plethora of opAdd, opMul, ..., we'd have this:
>>>
>>> T opBinary(string op)(T rhs) { ... }
>>>
>>> The string is "+", "*", etc.
>>
>> Can you show an example of defining an operator, like a minus, with that?
>>
> 
> T opBinary(string op)(T rhs) {
>     static if (op == "-") return data - rhs.data;
>     static if (op == "+") return data + rhs.data;
> 
>     // ... maybe this would work too ...
>     mixin("return data " ~ op ~ "rhs.data;");
> }
> 
> I love this syntax over the tons of different operation functions. Makes 
> it so much nicer, especially when supporting a bunch of different 
> paramater types (vectors are a good example of this).

Indeed, the advantage of this is that you can use string mixins to 
implement many operations at once, instead of laboriously defining many 
functions.


Andrei