Parse free functions

src/libclang/tokenizer.hpp

@@ -124,11 +124,21 @@ namespace cppast
                 return cursor_;
             }
 
+            token_iterator begin() const noexcept
+            {
+                return begin_;
+            }
+
             token_iterator cur() const noexcept
             {
                 return cur_;
             }
 
+            token_iterator end() const noexcept
+            {
+                return end_;
+            }
+
             void set_cur(token_iterator iter) noexcept
             {
                 cur_ = iter;