Add 'less than' operator in compilation conditions Swift 5.0

Author: emreozdil

codes/LessThanOperatorSwift5.swift

@@ -0,0 +1,22 @@
+// Support 'less than' operator in compilation conditions Swift 5.0
+
+// Proposal: SE-0224
+// This proposal augments the functionality implemented for proposal SE-0020
+// with the introduction of a new valid operator in compilation condition:
+// "<". The aim is that the syntax #if swift(<4.2) is supported by the language.
+
+#if !swift(>=4.2)
+// This will only be executed if the Swift version is less than 4.2.
+#endif
+
+#if !compiler(>=4.2)
+// This will only be executed if the Swift compiler version is less than 4.2.
+#endif
+
+#if swift(<4.2)
+// This will only be executed if the Swift version is less than 4.2.
+#endif
+
+#if compiler(<4.2)
+// This will only be executed if the Swift compiler version is less than 4.2.
+#endif