Why is creating of if Expressions not allowed?

[Alex]

On Sunday, 24 March 2019 at 18:18:39 UTC, sighoya wrote:
>
> Hmm..., sounds like bad news. Is there any mixin technology for 
> statements?

There was a recent thread on this.

https://forum.dlang.org/post/mailman.6499.1547823247.29801.digitalmars-d@puremagic.com

However, do you have a clear use case, where statement mixin 
would be considerably more profitable than the replacements 
suggested by Remy and Paul?