add operator* and a static assert against reference types

mapbox · Aug 27, 2014 · 1141292 · 1141292
1 parent 9badbd0
commit 1141292
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/optional.hpp b/optional.hpp
@@ -15,6 +15,8 @@ namespace mapbox { namespace util {
 
     template<typename T>
     class optional {
+        static_assert(!std::is_reference<T>::value, "optional doesn't support references");
+
         variant<none_t, T> variant_;
 
       public:
@@ -40,6 +42,10 @@ namespace mapbox { namespace util {
             return variant_.template get<T>();
         }
 
+        T const& operator *() const { return this->get() ; }
+        T        operator *()       { return this->get() ; }
+
+
         optional& operator = ( T const& v ) {
             variant_ = v;
             return *this;