Does remove immutability using cast to pass in a function make sense?
Steven Schveighoffer via Digitalmars-d-learn
digitalmars-d-learn at puremagic.com
Tue Sep 23 03:26:50 PDT 2014
On 9/22/14 10:07 PM, AsmMan wrote:
> I have this array:
>
> static immutable string[] months = ["jan", "fev", ...];
>
> I need to pass it into canFind(). But it doesn't works with immutables
> so I need to cast it like in canFind(cast(string[]) months, month) to
> work. There's a reason related to design why it doesn't work with
> immutables or a function just wasn't written?
>
> What I want to know is if I'm doing something wrong in casting it to
> work. I know from C which such casts should be done carefully
Yes, casting should be used very sparingly, and only when you have no
other choice.
Ali suggests that the latest version of DMD on git handles this, but
just an FYI, you do not need to cast to get a mutable array of strings:
canFind(months[], month)
should work.
-Steve
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