Re: Using enums as function parameters (in a minimized way)

Tue, 01 Dec 2015 05:05:59 -0800

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.

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