CIndex: add support for static_assert

[ogoffart]

Summary

Add support for introspecting static_assert with libclang.

[ogoffart]

Ping?

[ogoffart]

Ping 2.

[bkramer]

This is fine

include/clang-c/Index.h

    */
   CXCursor_ModuleImportDecl              = 600,
   CXCursor_TypeAliasTemplateDecl         = 601,
+  /**
+   * \brief A static_assert or _Static_assert node
+   */
+  CXCursor_StaticAssert                  = 602,
   CXCursor_FirstExtraDecl                = CXCursor_ModuleImportDecl,
-  CXCursor_LastExtraDecl                 = CXCursor_TypeAliasTemplateDecl,
+  CXCursor_LastExtraDecl                 = CXCursor_StaticAssert,
 
   /**
    * \brief A code completion overload candidate.

lib/Sema/SemaCodeComplete.cpp

     case Decl::ClassTemplatePartialSpecialization:
       return CXCursor_ClassTemplatePartialSpecialization;
     case Decl::UsingDirective:     return CXCursor_UsingDirective;
+    case Decl::StaticAssert:       return CXCursor_StaticAssert;
     case Decl::TranslationUnit:    return CXCursor_TranslationUnit;
       
     case Decl::Using:

tools/libclang/CIndex.cpp

   return false;
 }
 
+bool CursorVisitor::VisitStaticAssertDecl(StaticAssertDecl *D) {
+  if (Visit(MakeCXCursor(D->getAssertExpr(), StmtParent, TU, RegionOfInterest)))
+    return true;
+  if (Visit(MakeCXCursor(D->getMessage(), StmtParent, TU, RegionOfInterest)))
+    return true;
+  return false;
+}
+
 bool CursorVisitor::VisitDeclarationNameInfo(DeclarationNameInfo Name) {
   switch (Name.getName().getNameKind()) {
   case clang::DeclarationName::Identifier:

       return cxstring::createRef("OverloadCandidate");
   case CXCursor_TypeAliasTemplateDecl:
       return cxstring::createRef("TypeAliasTemplateDecl");
+  case CXCursor_StaticAssert:
+      return cxstring::createRef("StaticAssert");
   }
 
   llvm_unreachable("Unhandled CXCursorKind");

tools/libclang/CursorVisitor.h

   bool VisitUsingDecl(UsingDecl *D);
   bool VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
   bool VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
+  bool VisitStaticAssertDecl(StaticAssertDecl *D);
   
   // Name visitor
   bool VisitDeclarationNameInfo(DeclarationNameInfo Name);