Impelment LossLessStringConvertible for UUID

Author: jevonmao

Sources/FoundationEssentials/UUID.swift

@@ -16,7 +16,7 @@ public typealias uuid_string_t = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8
 
 /// Represents UUID strings, which can be used to uniquely identify types, interfaces, and other items.
 @available(macOS 10.8, iOS 6.0, tvOS 9.0, watchOS 2.0, *)
-public struct UUID : Hashable, Equatable, CustomStringConvertible, Sendable {
+public struct UUID : Hashable, Equatable, CustomStringConvertible, Sendable, LosslessStringConvertible {
     public private(set) var uuid: uuid_t = (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
 
     /* Create a new UUID with RFC 4122 version 4 random bytes */
@@ -57,6 +57,11 @@ public struct UUID : Hashable, Equatable, CustomStringConvertible, Sendable {
     public init(uuid: uuid_t) {
         self.uuid = uuid
     }
+    
+    /// LosslessStringConvertible initializer
+    public init?(_ description: String) {
+            self.init(uuidString: description)
+    }
 
     /// Returns a string created from the UUID, such as "E621E1F8-C36C-495A-93FC-0C247A3E6E5F"
     public var uuidString: String {

Tests/FoundationEssentialsTests/UUIDTests.swift

@@ -115,4 +115,19 @@ final class UUIDTests : XCTestCase {
         XCTAssertFalse(uuid2 > uuid1)
         XCTAssertTrue(uuid2 == uuid1)
     }
+    
+    func test_UUIDLosslessStringConvertible() {
+        let originalString = "E621E1F8-C36C-495A-93FC-0C247A3E6E5F"
+        let uuidFromString = UUID(originalString)
+        XCTAssertNotNil(uuidFromString, "UUID must be constructible from valid UUID string via LosslessStringConvertible")
+        XCTAssertEqual(uuidFromString?.description, originalString, "Round-tripped description must match original UUID string")
+
+        let uuid = UUID(uuidString: originalString)!
+        XCTAssertEqual(uuid, UUID(uuid.description), "UUID must round-trip through LosslessStringConvertible")
+
+        let invalidString = "not-a-uuid"
+        let invalidUUID = UUID(invalidString)
+        XCTAssertNil(invalidUUID, "Invalid UUID strings must result in nil from LosslessStringConvertible initializer")
+    }
+
 }