[IDE] Complete nonisolated, unowned, and access control attribute parameter

include/swift/IDE/CompletionLookup.h

@@ -612,7 +612,7 @@ class CompletionLookup final : public swift::VisibleDeclConsumer {
 
   void getAttributeDeclCompletions(bool IsInSil, std::optional<DeclKind> DK);
 
-  void getAttributeDeclParamCompletions(CustomSyntaxAttributeKind AttrKind,
+  void getAttributeDeclParamCompletions(ParameterizedDeclAttributeKind AttrKind,
                                         int ParamIndex, bool HasLabel);
 
   void getTypeAttributeKeywordCompletions(CompletionKind completionKind);

include/swift/Parse/IDEInspectionCallbacks.h

@@ -29,10 +29,13 @@ enum class ObjCSelectorContext {
   SetterSelector
 };
 
-/// Attributes that have syntax which can't be modelled using a function call.
-/// This can't be \c DeclAttrKind because '@freestandig' and '@attached' have
+/// Parameterized attributes that have code completion.
+/// This can't be \c DeclAttrKind because '@freestanding' and '@attached' have
 /// the same attribute kind but take different macro roles as arguemnts.
-enum class CustomSyntaxAttributeKind {
+enum class ParameterizedDeclAttributeKind {
+  AccessControl,
+  Nonisolated,
+  Unowned,
   Available,
   FreestandingMacro,
   AttachedMacro,
@@ -228,7 +231,7 @@ class CodeCompletionCallbacks {
   /// @available.
   /// If `HasLabel` is `true`, then the argument already has a label specified,
   /// e.g. we're completing after `names: ` in a macro declaration.
-  virtual void completeDeclAttrParam(CustomSyntaxAttributeKind DK, int Index,
+  virtual void completeDeclAttrParam(ParameterizedDeclAttributeKind DK, int Index,
                                      bool HasLabel){};
 
   /// Complete 'async' and 'throws' at effects specifier position.

lib/IDE/CodeCompletion.cpp

@@ -114,7 +114,7 @@ class CodeCompletionCallbacksImpl : public CodeCompletionCallbacks,
   SourceLoc DotLoc;
   TypeLoc ParsedTypeLoc;
   DeclContext *CurDeclContext = nullptr;
-  CustomSyntaxAttributeKind AttrKind;
+  ParameterizedDeclAttributeKind AttrKind;
 
   /// When the code completion token occurs in a custom attribute, the attribute
   /// it occurs in. Used so we can complete inside the attribute even if it's
@@ -272,7 +272,7 @@ class CodeCompletionCallbacksImpl : public CodeCompletionCallbacks,
   void completeCaseStmtKeyword() override;
   void completeCaseStmtBeginning(CodeCompletionExpr *E) override;
   void completeDeclAttrBeginning(bool Sil, bool isIndependent) override;
-  void completeDeclAttrParam(CustomSyntaxAttributeKind DK, int Index,
+  void completeDeclAttrParam(ParameterizedDeclAttributeKind DK, int Index,
                              bool HasLabel) override;
   void completeEffectsSpecifier(bool hasAsync, bool hasThrows) override;
   void completeInPrecedenceGroup(
@@ -460,7 +460,7 @@ void CodeCompletionCallbacksImpl::completeTypeSimpleBeginning() {
 }
 
 void CodeCompletionCallbacksImpl::completeDeclAttrParam(
-    CustomSyntaxAttributeKind DK, int Index, bool HasLabel) {
+    ParameterizedDeclAttributeKind DK, int Index, bool HasLabel) {
   Kind = CompletionKind::AttributeDeclParen;
   AttrKind = DK;
   AttrParamIndex = Index;

lib/IDE/CompletionLookup.cpp

@@ -3103,9 +3103,19 @@ void CompletionLookup::getAttributeDeclCompletions(bool IsInSil,
 }
 
 void CompletionLookup::getAttributeDeclParamCompletions(
-    CustomSyntaxAttributeKind AttrKind, int ParamIndex, bool HasLabel) {
+    ParameterizedDeclAttributeKind AttrKind, int ParamIndex, bool HasLabel) {
   switch (AttrKind) {
-  case CustomSyntaxAttributeKind::Available:
+  case ParameterizedDeclAttributeKind::Unowned:
+    addDeclAttrParamKeyword("safe", /*Parameters=*/{}, "", false);
+    addDeclAttrParamKeyword("unsafe", /*Parameters=*/{}, "", false);
+    break;
+  case ParameterizedDeclAttributeKind::Nonisolated:
+    addDeclAttrParamKeyword("unsafe", /*Parameters=*/{}, "", false);
+    break;
+  case ParameterizedDeclAttributeKind::AccessControl:
+    addDeclAttrParamKeyword("set", /*Parameters=*/{}, "", false);
+    break;
+  case ParameterizedDeclAttributeKind::Available:
     if (ParamIndex == 0) {
       addDeclAttrParamKeyword("*", /*Parameters=*/{}, "Platform", false);
 
@@ -3126,15 +3136,15 @@ void CompletionLookup::getAttributeDeclParamCompletions(
                               "Specify version number", true);
     }
     break;
-  case CustomSyntaxAttributeKind::FreestandingMacro:
-  case CustomSyntaxAttributeKind::AttachedMacro:
+  case ParameterizedDeclAttributeKind::FreestandingMacro:
+  case ParameterizedDeclAttributeKind::AttachedMacro:
     switch (ParamIndex) {
     case 0:
       for (auto role : getAllMacroRoles()) {
         bool isRoleSupported = isMacroSupported(role, Ctx);
-        if (AttrKind == CustomSyntaxAttributeKind::FreestandingMacro) {
+        if (AttrKind == ParameterizedDeclAttributeKind::FreestandingMacro) {
           isRoleSupported &= isFreestandingMacro(role);
-        } else if (AttrKind == CustomSyntaxAttributeKind::AttachedMacro) {
+        } else if (AttrKind == ParameterizedDeclAttributeKind::AttachedMacro) {
           isRoleSupported &= isAttachedMacro(role);
         }
         if (isRoleSupported) {
@@ -3162,7 +3172,7 @@ void CompletionLookup::getAttributeDeclParamCompletions(
       break;
     }
     break;
-  case CustomSyntaxAttributeKind::StorageRestrictions: {
+  case ParameterizedDeclAttributeKind::StorageRestrictions: {
     bool suggestInitializesLabel = false;
     bool suggestAccessesLabel = false;
     bool suggestArgument = false;
@@ -3295,7 +3305,7 @@ void CompletionLookup::getPrecedenceGroupCompletions(
 void CompletionLookup::getPoundAvailablePlatformCompletions() {
 
   // The platform names should be identical to those in @available.
-  getAttributeDeclParamCompletions(CustomSyntaxAttributeKind::Available, 0,
+  getAttributeDeclParamCompletions(ParameterizedDeclAttributeKind::Available, 0,
                                    /*HasLabel=*/false);
 }