[core] Use FileEntryRef and DirectoryEntryRef

Author: devajithvs

core/clingutils/src/TClingUtils.cxx

@@ -3388,7 +3388,7 @@ std::string ROOT::TMetaUtils::GetFileName(const clang::Decl& decl,
          = HdrSearch.LookupFile(llvm::sys::path::filename(headerFE->getName()),
                                 SourceLocation(),
                                 true /*isAngled*/, nullptr/*FromDir*/, foundDir,
-                                ArrayRef<std::pair<const FileEntry *, const DirectoryEntry *>>(),
+                                ArrayRef<std::pair<OptionalFileEntryRef, DirectoryEntryRef>>(),
                                 nullptr/*Searchpath*/, nullptr/*RelPath*/,
                                 nullptr/*SuggestedModule*/, nullptr/*RequestingModule*/,
                                 nullptr/*IsMapped*/, nullptr /*IsFrameworkFound*/,
@@ -3448,7 +3448,7 @@ std::string ROOT::TMetaUtils::GetFileName(const clang::Decl& decl,
       ConstSearchDirIterator* FoundDir = nullptr;
       FELong = HdrSearch.LookupFile(trailingPart, SourceLocation(),
                                     true /*isAngled*/, nullptr/*FromDir*/, FoundDir,
-                                    ArrayRef<std::pair<const FileEntry *, const DirectoryEntry *>>(),
+                                    ArrayRef<std::pair<OptionalFileEntryRef, DirectoryEntryRef>>(),
                                     nullptr/*Searchpath*/, nullptr/*RelPath*/,
                                     nullptr/*SuggestedModule*/, nullptr/*RequestingModule*/,
                                     nullptr/*IsMapped*/, nullptr /*IsFrameworkFound*/);
@@ -3474,7 +3474,7 @@ std::string ROOT::TMetaUtils::GetFileName(const clang::Decl& decl,
       // (or are we back to the previously found spelling, which is fine, too)
       if (HdrSearch.LookupFile(trailingPart, SourceLocation(),
                                true /*isAngled*/, nullptr/*FromDir*/, FoundDir,
-                               ArrayRef<std::pair<const FileEntry *, const DirectoryEntry *>>(),
+                               ArrayRef<std::pair<OptionalFileEntryRef, DirectoryEntryRef>>(),
                                nullptr/*Searchpath*/, nullptr/*RelPath*/,
                                nullptr/*SuggestedModule*/, nullptr/*RequestingModule*/,
                                nullptr/*IsMapped*/, nullptr /*IsFrameworkFound*/) == FELong) {

core/dictgen/src/TModuleGenerator.cxx

@@ -119,8 +119,8 @@ TModuleGenerator::GetSourceFileKind(const char *filename) const
       auto hdrFileEntry
          =  HdrSearch.LookupFile(filename, clang::SourceLocation(),
                                  true /*isAngled*/, nullptr /*FromDir*/, CurDir,
-                                 clang::ArrayRef<std::pair<const clang::FileEntry*,
-                                                           const clang::DirectoryEntry*>>(),
+                                 clang::ArrayRef<std::pair<clang::OptionalFileEntryRef,
+                                                           clang::DirectoryEntryRef>>(),
                                  nullptr /*SearchPath*/,/*RelativePath*/ nullptr,
                                  nullptr /*RequestingModule*/, nullptr /*SuggestedModule*/,
                                  nullptr /*IsMapped*/, nullptr /*IsFrameworkFound*/);
@@ -581,8 +581,8 @@ bool TModuleGenerator::FindHeader(const std::string &hdrName, std::string &hdrFu
    if (auto hdrFileEntry
          =  HdrSearch.LookupFile(hdrName, clang::SourceLocation(),
                                  true /*isAngled*/, nullptr /*FromDir*/, CurDir,
-                                 clang::ArrayRef<std::pair<const clang::FileEntry*,
-                                                         const clang::DirectoryEntry*>>(),
+                                 clang::ArrayRef<std::pair<clang::OptionalFileEntryRef,
+                                                         clang::DirectoryEntryRef>>(),
                                  nullptr /*SearchPath*/, nullptr /*RelativePath*/,
                                  nullptr /*RequestingModule*/, nullptr/*SuggestedModule*/,
                                  nullptr /*IsMapped*/, nullptr /*IsFrameworkFound*/)) {

core/dictgen/src/rootcling_impl.cxx

@@ -3909,7 +3909,7 @@ static bool ModuleContainsHeaders(TModuleGenerator &modGen, clang::HeaderSearch
                header, clang::SourceLocation(),
                /*isAngled*/ false,
                /*FromDir*/ 0, CurDir,
-               clang::ArrayRef<std::pair<const clang::FileEntry *, const clang::DirectoryEntry *>>(),
+               clang::ArrayRef<std::pair<clang::OptionalFileEntryRef, clang::DirectoryEntryRef>>(),
                /*SearchPath*/ 0,
                /*RelativePath*/ 0,
                /*RequestingModule*/ 0, &SuggestedModule,

core/metacling/src/TCling.cxx

@@ -3236,8 +3236,8 @@ Bool_t TCling::IsLoaded(const char* filename) const
                            clang::SourceLocation(),
                            /*isAngled*/ false,
                            /*FromDir*/ nullptr, CurDir,
-                           clang::ArrayRef<std::pair<const clang::FileEntry *,
-                           const clang::DirectoryEntry *>>(),
+                           clang::ArrayRef<std::pair<clang::OptionalFileEntryRef,
+                           clang::DirectoryEntryRef>>(),
                            /*SearchPath*/ nullptr,
                            /*RelativePath*/ nullptr,
                            /*RequestingModule*/ nullptr,