A minor optimization of Diagnostic::Diagnostic

src/Diagnostic.cc

@@ -11,7 +11,7 @@ clangmm::Diagnostic::Diagnostic(CXTranslationUnit& cx_tu, CXDiagnostic& cx_diagn
   SourceLocation start_location(clang_getDiagnosticLocation(cx_diagnostic));
   path=start_location.get_path();
   auto start_offset=start_location.get_offset();
-  Tokens tokens(cx_tu, SourceRange(start_location, start_location));
+  Tokens tokens(cx_tu, SourceRange(start_location, start_location), false);
   if(tokens.size()==1)
     offsets={start_offset, tokens.begin()->get_source_range().get_offsets().second};
   

src/Tokens.cc

@@ -4,9 +4,19 @@
 #include <cstring>
 #include <map>
 
-clangmm::Tokens::Tokens(CXTranslationUnit &cx_tu, const SourceRange &range): cx_tu(cx_tu) {
+clangmm::Tokens::Tokens(CXTranslationUnit &cx_tu, const SourceRange &range, bool annotate_tokens): cx_tu(cx_tu) {
   unsigned num_tokens;
   clang_tokenize(cx_tu, range.cx_range, &cx_tokens, &num_tokens);
+  
+  if(!annotate_tokens) {
+    cx_cursors=std::unique_ptr<CXCursor[]>(new CXCursor[num_tokens]);
+    for (unsigned i = 0; i < num_tokens; i++) {
+      cx_cursors[i]=clang_getNullCursor();
+      emplace_back(Token(cx_tu, cx_tokens[i], cx_cursors[i]));
+    }
+    return;
+  }
+  
   cx_cursors=std::unique_ptr<CXCursor[]>(new CXCursor[num_tokens]); // To avoid allocation with initialization
   clang_annotateTokens(cx_tu, cx_tokens, num_tokens, cx_cursors.get());
   

src/Tokens.h

@@ -11,7 +11,7 @@ namespace clangmm {
   class Tokens : public std::vector<clangmm::Token> {
     friend class TranslationUnit;
     friend class Diagnostic;
-    Tokens(CXTranslationUnit &cx_tu, const SourceRange &range);
+    Tokens(CXTranslationUnit &cx_tu, const SourceRange &range, bool annotate_tokens=true);
   public:
     ~Tokens();
     std::vector<std::pair<clangmm::Offset, clangmm::Offset> > get_similar_token_offsets(Cursor::Kind kind, const std::string &spelling,