Initial data commit

Task/Exponentiation-order/Swift/exponentiation-order.swift

@@ -0,0 +1,37 @@
+precedencegroup ExponentiationPrecedence {
+  associativity: left
+  higherThan: MultiplicationPrecedence
+}
+
+infix operator ** : ExponentiationPrecedence
+
+@inlinable
+public func ** <T: BinaryInteger>(lhs: T, rhs: T) -> T {
+  guard lhs != 0 else {
+    return 1
+  }
+
+  var x = lhs
+  var n = rhs
+  var y = T(1)
+
+  while n > 1 {
+    switch n & 1 {
+    case 0:
+      n /= 2
+    case 1:
+      y *= x
+      n = (n - 1) / 2
+    case _:
+      fatalError()
+    }
+
+    x *= x
+  }
+
+  return x * y
+}
+
+print(5 ** 3 ** 2)
+print((5 ** 3) ** 2)
+print(5 ** (3 ** 2))