Added support for P0609: Attributes for Structured Bindings.

Author: andreasfertig

CodeGenerator.cpp

@@ -5149,6 +5149,8 @@ void StructuredBindingsCodeGenerator::InsertArg(const BindingDecl* stmt)
         type = stmt->getASTContext().getLValueReferenceType(type);
     }
 
+    InsertAttributes(stmt->attrs());
+
     mOutputFormatHelper.Append(GetQualifiers(*dyn_cast_or_null<VarDecl>(stmt->getDecomposedDecl())),
                                GetTypeNameAsParameter(type, GetName(*stmt)),
                                hlpAssing);

tests/p0609Test.cpp

@@ -0,0 +1,7 @@
+// cmdline:-std=c++26
+
+auto g() {
+  int ar[]{2,3,4};
+  auto [a, b [[maybe_unused]], c] = ar;
+  return a + c;
+}

tests/p0609Test.expect

@@ -0,0 +1,9 @@
+int g()
+{
+  int ar[3] = {2, 3, 4};
+  int __ar5[3] = {ar[0], ar[1], ar[2]};
+  int & a = __ar5[0];
+  [[maybe_unused]] int & b = __ar5[1];
+  int & c = __ar5[2];
+  return a + c;
+}