This is a quick one.  It would be nice to take advantage of all the wonderful 
characters that swift can use.  Not only unicode, but some of the less-used 
ASCII as well.

In particular, I would like to see:

1) Allow the ‘π’ character as a FloatingPoint literal.  We can use CGFloat.pi 
and Double.pi right now, and I am not asking to replace that (since depending 
on the nationality of your keyboard, it can be simple or difficult to type), 
but π just reads much better. Would be good to have it as an option.  It would 
also be nice to be able to combine it with numbers in the literal (e.g. 2π)

2) Allow ≤, ≥, ≠ for less than or equal, greater than or equal, and not equals. 
 This was one of the first extensions I made when I began using swift.  I would 
really like to be able to use it in frameworks as well.  Again, it doesn’t need 
to replace <=, >=, !=, it just adds polish and readability for those who want 
to use it.  You can even use my extension on comparable if you so desire.

When I brought this up before there was push-back because it would "clutter the 
namespace".  I don’t think that is a valid argument though because any other 
use of the symbols π, ≤, ≥, and ≠ would be downright confusing. If you are 
creating a variable named ‘π’ and sticking something other than pi in it, that 
is just asking for trouble.  Same with the operations.  May as well use them 
for the one thing they make sense for…

Also, little touches are what make a language enjoyable.

Thanks,
Jon
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