Hello community,

Tau day <http://tauday.com/> was yesterday, and reminded me that we forgot to provide a `tau` next to `FloatingPoint`’s `pi` property. How about we write a proposal to brind this forward-thinking constant to a forward-thinking language?

Proposal: Extend `FloatingPoint` with tau

/// The mathematical constant tau = 6.28318...

///

/// Extensible floating-point types might provide additional APIs to obtain

/// this value to caller-specified precision.

static var tau: Self { get }

David.