Implement libclang support for using directives (cursor + visitation +

suppressing USRs). Also, fix up the source location information for
using directives so that the declaration location refers to the
namespace name.

llvm-svn: 112693

3 files changed, 19 insertions, 3 deletions

diff --git a/clang/tools/libclang/CIndex.cpp b/clang/tools/libclang/CIndex.cpp
index 230631bad9a..d8491863244 100644
--- a/clang/tools/libclang/CIndex.cpp
+++ b/clang/tools/libclang/CIndex.cpp
@@ -317,7 +317,8 @@ public:
   bool VisitLinkageSpecDecl(LinkageSpecDecl *D);
   bool VisitNamespaceDecl(NamespaceDecl *D);
   bool VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
- 
+  bool VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
+  
   // Name visitor
   bool VisitDeclarationNameInfo(DeclarationNameInfo Name);
   
@@ -871,6 +872,13 @@ bool CursorVisitor::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
                                       D->getTargetNameLoc(), TU));
 }
 
+bool CursorVisitor::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
+  // FIXME: Visit nested-name-specifier
+
+  return Visit(MakeCursorNamespaceRef(D->getNominatedNamespaceAsWritten(),
+                                      D->getIdentLocation(), TU));
+}
+
 bool CursorVisitor::VisitDeclarationNameInfo(DeclarationNameInfo Name) {
   switch (Name.getName().getNameKind()) {
   case clang::DeclarationName::Identifier:
@@ -2022,6 +2030,9 @@ static CXString getDeclSpelling(Decl *D) {
     // ObjCCategoryImplDecl returns the category name.
     return createCXString(CIMP->getIdentifier()->getNameStart());
 
+  if (isa<UsingDirectiveDecl>(D))
+    return createCXString("");
+  
   llvm::SmallString<1024> S;
   llvm::raw_svector_ostream os(S);
   ND->printName(os);
@@ -2219,6 +2230,8 @@ CXString clang_getCursorKindSpelling(enum CXCursorKind Kind) {
     return createCXString("ClassTemplatePartialSpecialization");
   case CXCursor_NamespaceAlias:
     return createCXString("NamespaceAlias");
+  case CXCursor_UsingDirective:
+    return createCXString("UsingDirective");
   }
 
   llvm_unreachable("Unhandled CXCursorKind");
diff --git a/clang/tools/libclang/CIndexUSRs.cpp b/clang/tools/libclang/CIndexUSRs.cpp
index 9ef851aeaa2..5628aef056a 100644
--- a/clang/tools/libclang/CIndexUSRs.cpp
+++ b/clang/tools/libclang/CIndexUSRs.cpp
@@ -82,9 +82,11 @@ public:
   void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
   void VisitLinkageSpecDecl(LinkageSpecDecl *D) {
     IgnoreResults = true;
-    return;
   }
-
+  void VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
+    IgnoreResults = true;
+  }
+  
   /// Generate the string component containing the location of the
   ///  declaration.
   bool GenLoc(const Decl *D);
diff --git a/clang/tools/libclang/CXCursor.cpp b/clang/tools/libclang/CXCursor.cpp
index 3edbc4d1ef9..75806ffa8d7 100644
--- a/clang/tools/libclang/CXCursor.cpp
+++ b/clang/tools/libclang/CXCursor.cpp
@@ -69,6 +69,7 @@ static CXCursorKind GetCursorKind(Decl *D) {
     case Decl::ClassTemplate:      return CXCursor_ClassTemplate;
     case Decl::ClassTemplatePartialSpecialization:
       return CXCursor_ClassTemplatePartialSpecialization;
+    case Decl::UsingDirective:     return CXCursor_UsingDirective;
       
     default:
       if (TagDecl *TD = dyn_cast<TagDecl>(D)) {