.swift-format: Enable NoVoidReturnOnFunctionSignature

Author: AnthonyLatsis

.swift-format

@@ -15,5 +15,6 @@
         "UseLetInEveryBoundCaseVariable": false,
         "UseSynthesizedInitializer": false,
         "ReturnVoidInsteadOfEmptyTuple": true,
+        "NoVoidReturnOnFunctionSignature": true,
     }
 }

Examples/Sources/MacroExamples/Implementation/Peer/AddAsyncMacro.swift

@@ -42,7 +42,9 @@ public struct AddAsyncMacro: PeerMacro {
     }
 
     // This only makes sense void functions
-    if funcDecl.signature.returnClause?.type.as(IdentifierTypeSyntax.self)?.name.text != "Void" {
+    if let returnClause = funcDecl.signature.returnClause,
+      returnClause.type.as(IdentifierTypeSyntax.self)?.name.text != "Void"
+    {
       throw CustomError.message(
         "@addAsync requires an function that returns void"
       )

Examples/Sources/MacroExamples/Playground/PeerMacrosPlayground.swift

@@ -17,12 +17,12 @@ func runPeerMacrosPlayground() {
 
   struct MyStruct {
     @AddAsync
-    func c(a: Int, for b: String, _ value: Double, completionBlock: @escaping (Result<String, Error>) -> Void) -> Void {
+    func c(a: Int, for b: String, _ value: Double, completionBlock: @escaping (Result<String, Error>) -> Void) {
       completionBlock(.success("a: \(a), b: \(b), value: \(value)"))
     }
 
     @AddAsync
-    func d(a: Int, for b: String, _ value: Double, completionBlock: @escaping (Bool) -> Void) -> Void {
+    func d(a: Int, for b: String, _ value: Double, completionBlock: @escaping (Bool) -> Void) {
       completionBlock(true)
     }
   }