libclang: itroduce cxstring::createEmpty()


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@174174 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/libclang/CIndexDiagnostic.cpp b/tools/libclang/CIndexDiagnostic.cpp
index f48034e..9c5aa93 100644
--- a/tools/libclang/CIndexDiagnostic.cpp
+++ b/tools/libclang/CIndexDiagnostic.cpp
@@ -67,12 +67,12 @@
   
   CXString getDiagnosticOption(CXString *Disable) const {
     if (Disable)
-      *Disable = createCXString("", false);    
-    return createCXString("", false);
+      *Disable = cxstring::createEmpty();
+    return cxstring::createEmpty();
   }
   
   unsigned getCategory() const { return 0; }
-  CXString getCategoryText() const { return createCXString(""); }
+  CXString getCategoryText() const { return cxstring::createEmpty(); }
 
   unsigned getNumRanges() const { return 0; }
   CXSourceRange getRange(unsigned Range) const { return clang_getNullRange(); }
@@ -80,7 +80,7 @@
   CXString getFixIt(unsigned FixIt, CXSourceRange *ReplacementRange) const {
     if (ReplacementRange)
       *ReplacementRange = clang_getNullRange();
-    return createCXString("", false);
+    return cxstring::createEmpty();
   }
 };    
     
@@ -239,7 +239,7 @@
 
 CXString clang_formatDiagnostic(CXDiagnostic Diagnostic, unsigned Options) {
   if (!Diagnostic)
-    return createCXString("");
+    return cxstring::createEmpty();
 
   CXDiagnosticSeverity Severity = clang_getDiagnosticSeverity(Diagnostic);
 
@@ -377,17 +377,17 @@
 CXString clang_getDiagnosticSpelling(CXDiagnostic Diag) {
   if (CXDiagnosticImpl *D = static_cast<CXDiagnosticImpl *>(Diag))
     return D->getSpelling();
-  return createCXString("");
+  return cxstring::createEmpty();
 }
 
 CXString clang_getDiagnosticOption(CXDiagnostic Diag, CXString *Disable) {
   if (Disable)
-    *Disable = createCXString("");
+    *Disable = cxstring::createEmpty();
 
   if (CXDiagnosticImpl *D = static_cast<CXDiagnosticImpl *>(Diag))
     return D->getDiagnosticOption(Disable);
 
-  return createCXString("");
+  return cxstring::createEmpty();
 }
 
 unsigned clang_getDiagnosticCategory(CXDiagnostic Diag) {
@@ -404,7 +404,7 @@
 CXString clang_getDiagnosticCategoryText(CXDiagnostic Diag) {
   if (CXDiagnosticImpl *D = static_cast<CXDiagnosticImpl *>(Diag))
     return D->getCategoryText();
-  return createCXString("");
+  return cxstring::createEmpty();
 }
   
 unsigned clang_getDiagnosticNumRanges(CXDiagnostic Diag) {
@@ -432,7 +432,7 @@
   if (!D || FixIt >= D->getNumFixIts()) {
     if (ReplacementRange)
       *ReplacementRange = clang_getNullRange();
-    return createCXString("");
+    return cxstring::createEmpty();
   }
   return D->getFixIt(FixIt, ReplacementRange);
 }