std.typecons Typedef initializers?

[Chris Katko]

On Monday, 25 April 2022 at 12:53:14 UTC, Mike Parker wrote:
> On Monday, 25 April 2022 at 08:54:52 UTC, Chris Katko wrote:
>> ````D
>> struct pair
>> {
>> float x,y;
>> }
>>
>> alias sPair = Typedef!pair; // pair of xy in screen space 
>> coordinates
>> alias vPair = Typedef!pair; // pair of xy in viewport space 
>> coordinates
>> //etc
>>
>>
>>
>> How do you initialize a typedef'd struct?
>
> ``d
> vPair v1 = vPair(pair(1f, 2f));
> ```

So to use a typedef'd struct... I have to basically add the 
original type on top of the typedef'd type every time? Surely 
it's not this clunky?

I mean, why even use a typedef then. Why not use just pair, 
sPair, vPair, etc as  separate types with identical members and 
cast as necessary? I'm not sure what the benefit typedef is 
adding here.

Thanks