Re: std.traits : Select - could it be better?

[SrMordred via Digitalmars-d]

On Thursday, 5 July 2018 at 20:29:02 UTC, Steven Schveighoffer 
wrote:
On 7/5/18 4:27 PM, Steven Schveighoffer wrote:
template BetterSelect(bool cond, alias temp1, alias temp2, 
Args...)
{
    import std.meta : Instantiate;
    static if(cond)
       alias BetterSelect = Instantiate!(temp1, Args);
    else
       alias BetterSelect = Instantiate!(temp2, Args);
}

ugh, got too cute for my own good :) No need for Instantiate 
here:

alias BetterSelect = temp1!Args;
alias BetterSelect = temp2!Args;

-Steve

I find another solution :)

template Try(alias T, Args...)
{
    static if( is( T!Args ) )
        alias Try = T!Args;
}

alias U = Select!( isPointer!T, Try!( PointerTarget, T ), T );