Alias Vs. Enum?

[Rubn]

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template valueOf(alias v) // <-- alias
{
     alias valueOf = v;
}

alias aa = valueOf!(10 == 10);
enum  ee = 10 == 10;

alias err = 10 == 10; // error


Can't alias just be extended to support enum values as well 
instead of having this workaround with templates? Is there any 
reason this hasn't already been done?