Add signature() to cpp_function_base

include/cppast/cpp_function.hpp

@@ -94,6 +94,14 @@ namespace cppast
             return variadic_;
         }
 
+        /// \returns The signature of the function,
+        /// i.e. parameters and cv/ref-qualifiers if a member function.
+        /// It has the form `(int,char,...) const`.
+        std::string signature() const
+        {
+            return do_get_signature();
+        }
+
     protected:
         /// Builder class for functions.
         ///
@@ -176,6 +184,10 @@ namespace cppast
         {
         }
 
+    protected:
+        /// \returns The signature, it is called by [*signature()]().
+        virtual std::string do_get_signature() const;
+
     private:
         detail::intrusive_list<cpp_function_parameter> parameters_;
         std::unique_ptr<cpp_expression>                noexcept_expr_;

include/cppast/cpp_member_function.hpp

@@ -23,24 +23,10 @@ namespace cppast
         pure,     //< Set if the function is pure.
         override, //< Set if the function overrides a base class function.
         final,    //< Set if the function is marked `final`.
-    };
-} // namespace cppast
 
-/// \exclude
-namespace type_safe
-{
-    template <>
-    struct flag_set_traits<cppast::cpp_virtual_flags> : std::true_type
-    {
-        static constexpr std::size_t size() noexcept
-        {
-            return 3u;
-        }
+        _flag_set_size, //< \exclude
     };
-} // namespace type_safe
 
-namespace cppast
-{
     /// The `virtual` information of a member function.
     ///
     /// This is an optional of the combination of the [cppast::cpp_virtual_flags]().
@@ -161,6 +147,9 @@ namespace cppast
         {
         }
 
+    protected:
+        std::string do_get_signature() const override;
+
     private:
         std::unique_ptr<cpp_type> return_type_;
         cpp_virtual               virtual_;

include/cppast/cpp_type.hpp

@@ -434,6 +434,9 @@ namespace cppast
         // write prefix, variadic, name, suffix
         void write_type(code_generator::output& output, const cpp_type& type, std::string name,
                         bool is_variadic = false);
+
+        // simple to_string() for types
+        std::string to_string(const cpp_type& type);
     } // namespace detail
 } // namespace cppast