TmuxVersion.description

Calling this property directly is discouraged. Instead, convert an instance of any type to a string by using the String(describing:) initializer. This initializer works with any type, and uses the custom description property for types that conform to CustomStringConvertible:

struct Point: CustomStringConvertible { let x: Int, y: Int

var description: String { return "(\(x), \(y))" } }

let p = Point(x: 21, y: 30) let s = String(describing: p) print(s) // Prints "(21, 30)"

The conversion of p to a string in the assignment to s uses the Point type's description property.