Using enums as function parameters (in a minimized way)

[tcak via Digitalmars-d-learn]

On Tuesday, 1 December 2015 at 10:50:04 UTC, Rikki Cattermole 
wrote:
> On 01/12/15 11:44 PM, Ozan wrote:
>> Hi
>>
>> Let's say we have an enum like
>>
>> enum SomethingAboutChristmas {
>>    SantaClaus,
>>    Angel,
>>    Tree
>> }
>>
>> and want to use it in a function like
>>
>>    void goingChristmas(SomethingAboutChristmas enumvalue)
>>
>> it works fine like following
>>
>>    goingChristmas(SomethingAboutChristmas.Tree)
>>
>> I prefer to use a shorter version
>>
>>    goingChristmas(Tree)
>>
>> because it's clear (for me), that "Tree" in "goingChristmas()" 
>> is an
>> enum of "SomethingAboutChristmas"
>>
>> Is any chance to do this? The DMD-compiler says no.
>>
>> Thanke & Regards, Ozan
>
> If you insist..
> You can also use alias and with statement to emulate this too.
> Or generate it at compile time.
>
> enum SomethingAboutChristmas {
>     SantaClaus,
>     Angel,
>     Tree
> }
>
> enum {
>     SantaClaus = SomethingAboutChristmas.SantaClaus,
>     Angel = SomethingAboutChristmas.Angel,
>     Tree = SomethingAboutChristmas.Tree,
> }
>
> void main() {
> 	SomethingAboutChristmas foo = Tree;	
> }

This is like: Q) I want to write an OS. How?  A) Write in 
assembly.

What Ozan says is logical. Compiler should assume it in that way 
normally. I have thoroughly thought about whether this assumption 
would cause problem yet though.

Unfortunately compiler doesn't accept that.