Assignment operators that max or min a value against a variable

MaxMinAssignment.swift

infix operator >>>= {
associativity right
precedence 90
assignment
}

infix operator <<<= {
associativity right
precedence 90
assignment
}

func >>>= <T: Comparable> (inout left: T, right: T) {
    left = max(left, right)
}

func <<<= <T: Comparable> (inout left: T, right: T) {
    left = min(left, right)
}

// usage
var x = 5
x >>>= 6  // equivalent to x = max(x, 6). Will set x to 6.
x >>>= 3  // equivalent to x = max(x, 3). Will set x to 6.

x <<<= 4  // equivalent to x = min(x, 4). Will set x to 4.
x <<<= 10 // equivalent to x = min(x, 10). Will set x to 4.