Objective-C SDK modernization. When modernizing to

use NS_ENUM/NS_OPTIONS macros, add an import of
Foundation.h (or its module) as necessary.
rdar://18498550

llvm-svn: 219225

1 files changed, 25 insertions, 7 deletions

diff --git a/clang/lib/ARCMigrate/ObjCMT.cpp b/clang/lib/ARCMigrate/ObjCMT.cpp
index f9c6e6e644f..c21e7324ebb 100644
--- a/clang/lib/ARCMigrate/ObjCMT.cpp
+++ b/clang/lib/ARCMigrate/ObjCMT.cpp
@@ -81,6 +81,8 @@ class ObjCMigrateASTConsumer : public ASTConsumer {
 
   void inferDesignatedInitializers(ASTContext &Ctx,
                                    const ObjCImplementationDecl *ImplD);
+  
+  bool InsertFoundation(ASTContext &Ctx, SourceLocation Loc);
 
 public:
   std::string MigrateDir;
@@ -95,6 +97,7 @@ public:
   const PPConditionalDirectiveRecord *PPRec;
   Preprocessor &PP;
   bool IsOutputFile;
+  bool FoundationIncluded;
   llvm::SmallPtrSet<ObjCProtocolDecl *, 32> ObjCProtocolDecls;
   llvm::SmallVector<const Decl *, 8> CFFunctionIBCandidates;
   llvm::StringMap<char> WhiteListFilenames;
@@ -111,7 +114,8 @@ public:
     ASTMigrateActions(astMigrateActions),
     NSIntegerTypedefed(nullptr), NSUIntegerTypedefed(nullptr),
     Remapper(remapper), FileMgr(fileMgr), PPRec(PPRec), PP(PP),
-    IsOutputFile(isOutputFile) {
+    IsOutputFile(isOutputFile),
+    FoundationIncluded(false){
 
     for (ArrayRef<std::string>::iterator
            I = WhiteList.begin(), E = WhiteList.end(); I != E; ++I) {
@@ -809,11 +813,8 @@ bool ObjCMigrateASTConsumer::migrateNSEnumDecl(ASTContext &Ctx,
     if (const EnumType *EnumTy = qt->getAs<EnumType>()) {
       if (EnumTy->getDecl() == EnumDcl) {
         bool NSOptions = UseNSOptionsMacro(PP, Ctx, EnumDcl);
-        if (NSOptions) {
-          if (!Ctx.Idents.get("NS_OPTIONS").hasMacroDefinition())
-            return false;
-        }
-        else if (!Ctx.Idents.get("NS_ENUM").hasMacroDefinition())
+        if (!Ctx.Idents.get("NS_ENUM").hasMacroDefinition() &&
+            !InsertFoundation(Ctx, TypedefDcl->getLocStart()))
           return false;
         edit::Commit commit(*Editor);
         rewriteToNSMacroDecl(EnumDcl, TypedefDcl, *NSAPIObj, commit, !NSOptions);
@@ -827,7 +828,8 @@ bool ObjCMigrateASTConsumer::migrateNSEnumDecl(ASTContext &Ctx,
   // We may still use NS_OPTIONS based on what we find in the enumertor list.
   bool NSOptions = UseNSOptionsMacro(PP, Ctx, EnumDcl);
   // For sanity check, see if macro NS_ENUM can be seen.
-  if (!Ctx.Idents.get("NS_ENUM").hasMacroDefinition())
+  if (!Ctx.Idents.get("NS_ENUM").hasMacroDefinition()
+        && !InsertFoundation(Ctx, TypedefDcl->getLocStart()))
     return false;
   edit::Commit commit(*Editor);
   bool Res = rewriteToNSEnumDecl(EnumDcl, TypedefDcl, *NSAPIObj,
@@ -1612,6 +1614,22 @@ void ObjCMigrateASTConsumer::inferDesignatedInitializers(
   }
 }
 
+bool ObjCMigrateASTConsumer::InsertFoundation(ASTContext &Ctx,
+                                              SourceLocation  Loc) {
+  if (FoundationIncluded)
+    return true;
+  if (Loc.isInvalid())
+    return false;
+  edit::Commit commit(*Editor);
+  if (Ctx.getLangOpts().Modules)
+    commit.insert(Loc, "@import Foundation;\n");
+  else
+    commit.insert(Loc, "#import <Foundation/Foundation.h>\n");
+  Editor->commit(commit);
+  FoundationIncluded = true;
+  return true;
+}
+
 namespace {
 
 class RewritesReceiver : public edit::EditsReceiver {