Improve initializer fixit when there are no parameters and no body

.github/workflows/ci.yml

@@ -36,7 +36,6 @@ jobs:
           sudo xcodebuild -runFirstLaunch
           sudo xcrun simctl list
           sudo xcodebuild -downloadPlatform visionOS
-          sudo xcodebuild -runFirstLaunch
       - name: Build Framework
         run: xcrun xcodebuild -skipMacroValidation -skipPackagePluginValidation build -scheme SafeDI-Package -destination ${{ matrix.platforms }}
 
@@ -116,8 +115,13 @@ jobs:
         run: sudo xcode-select --switch /Applications/Xcode_16.4.0.app/Contents/Developer
       - name: Install Pod
         run: bundle exec pod install --project-directory=Examples/ExampleCocoaPodsIntegration
+      - name: Download iOS
+        run: |
+          sudo xcodebuild -runFirstLaunch
+          sudo xcrun simctl list
+          sudo xcodebuild -downloadPlatform iOS -buildVersion 22F77
       - name: Build CocoaPods Integration
-        run: xcrun xcodebuild build -scheme ExampleCocoaPodsIntegration -configuration Debug -workspace Examples/ExampleCocoaPodsIntegration/ExampleCocoaPodsIntegration.xcworkspace -destination 'platform=iOS Simulator,OS=18.4,name=iPad (10th generation)' # Explicitly test the Debug build. Our pod lint jobs are already testing the Release build.
+        run: xcrun xcodebuild build -scheme ExampleCocoaPodsIntegration -configuration Debug -workspace Examples/ExampleCocoaPodsIntegration/ExampleCocoaPodsIntegration.xcworkspace -destination 'platform=iOS Simulator,OS=18.5,name=iPad (10th generation)' # Explicitly test the Debug build. Our pod lint jobs are already testing the Release build.
 
   spm:
     name: Build and Test on Xcode 16
@@ -174,7 +178,6 @@ jobs:
           sudo xcodebuild -runFirstLaunch
           sudo xcrun simctl list
           sudo xcodebuild -downloadPlatform ${{ matrix.platforms }}
-          sudo xcodebuild -runFirstLaunch
       - name: Lint Podspec
         run: bundle exec pod lib lint --verbose --fail-fast --swift-version=6.0 --platforms=${{ matrix.platforms }}
 

Sources/SafeDIMacros/Macros/InstantiableMacro.swift

@@ -274,7 +274,9 @@ public struct InstantiableMacro: MemberMacro {
 									return existingAssignment
 								} else {
 									var propertyAssignment = $0.asPropertyAssignment()
-									propertyAssignment.leadingTrivia = body.statements.first?.leadingTrivia ?? []
+									if let leadingTrivia = body.statements.first?.leadingTrivia {
+										propertyAssignment.leadingTrivia = leadingTrivia
+									}
 									return propertyAssignment
 								}
 							}

Tests/SafeDIMacrosTests/InstantiableMacroTests.swift

@@ -1935,6 +1935,76 @@ import SafeDICore
 			}
 		}
 
+		@Test
+		func declaration_fixit_updatesRequiredInitializerWhenAllDependenciesMissingFromInit() {
+			assertMacro {
+				"""
+				@Instantiable
+				public struct ExampleService: Instantiable {
+					public init() {
+					}
+
+					@Received let received: Received
+					@Instantiated let instantiated: Instantiated
+					@Forwarded let forwarded: Forwarded
+				}
+				"""
+			} diagnostics: {
+				"""
+				@Instantiable
+				public struct ExampleService: Instantiable {
+					public init() {
+				 ╰─ 🛑 @Instantiable-decorated type must have a `public` or `open` initializer with a parameter for each @Instantiated, @Received, or @Forwarded-decorated property.
+				    ✏️ Add arguments for received: Received, instantiated: Instantiated, forwarded: Forwarded
+					}
+
+					@Received let received: Received
+					@Instantiated let instantiated: Instantiated
+					@Forwarded let forwarded: Forwarded
+				}
+				"""
+			} fixes: {
+				"""
+				@Instantiable
+				public struct ExampleService: Instantiable {
+					public init(
+				received: Received,
+				instantiated: Instantiated,
+				forwarded: Forwarded
+				) {
+				self.received = received
+				self.instantiated = instantiated
+				self.forwarded = forwarded
+					}
+
+					@Received let received: Received
+					@Instantiated let instantiated: Instantiated
+					@Forwarded let forwarded: Forwarded
+				}
+				"""
+			} expansion: {
+				"""
+				public struct ExampleService: Instantiable {
+					public init(
+				received: Received,
+				instantiated: Instantiated,
+				forwarded: Forwarded
+				) {
+				self.received = received
+				self.instantiated = instantiated
+				self.forwarded = forwarded
+					}
+
+					let received: Received
+					let instantiated: Instantiated
+					let forwarded: Forwarded
+
+					public typealias ForwardedProperties = Forwarded
+				}
+				"""
+			}
+		}
+
 		@Test
 		func declaration_fixit_updatesRequiredInitializerWhenIncorrectAccessibilityOnInitAndOtherNonConformingInitializersExist() {
 			assertMacro {