use using instead of typedef

Chen Lihui · Chen Lihui · commit 3cb52a9b6ddc · 2023-07-14T10:25:45.000+08:00
Signed-off-by: Chen Lihui &lt;lihui.chen@sony.com&gt;
diff --git a/rclcpp/include/rclcpp/typesupport_helpers.hpp b/rclcpp/include/rclcpp/typesupport_helpers.hpp
@@ -52,25 +52,25 @@ struct typesupport_action_tag {};
 template<typename T>
 struct typesupport_traits
 {
-  typedef T type_tag;
+  using type_tag = T;
 };
 
 template<>
 struct typesupport_traits<rosidl_message_type_support_t>
 {
-  typedef typesupport_message_tag type_tag;
+  using type_tag = typesupport_message_tag;
 };
 
 template<>
 struct typesupport_traits<rosidl_service_type_support_t>
 {
-  typedef typesupport_service_tag type_tag;
+  using type_tag = typesupport_service_tag;
 };
 
 template<>
 struct typesupport_traits<rosidl_action_type_support_t>
 {
-  typedef typesupport_action_tag type_tag;
+  using type_tag = typesupport_action_tag;
 };
 
 using SymbolNameErrorFuncPair = std::pair<std::string, std::function<std::string()>>;
@@ -132,7 +132,6 @@ get_typesupport_handle(
   }
 }
 
-
 }  // namespace rclcpp
 
 #endif  // RCLCPP__TYPESUPPORT_HELPERS_HPP_

Original file line number	Diff line number	Diff line change
`@@ -52,25 +52,25 @@ struct typesupport_action_tag {};`
`52`	`52`	`template<typename T>`
`53`	`53`	`struct typesupport_traits`
`54`	`54`	`{`
`55`		`- typedef T type_tag;`
	`55`	`+ using type_tag = T;`
`56`	`56`	`};`
`57`	`57`
`58`	`58`	`template<>`
`59`	`59`	`struct typesupport_traits<rosidl_message_type_support_t>`
`60`	`60`	`{`
`61`		`- typedef typesupport_message_tag type_tag;`
	`61`	`+ using type_tag = typesupport_message_tag;`
`62`	`62`	`};`
`63`	`63`
`64`	`64`	`template<>`
`65`	`65`	`struct typesupport_traits<rosidl_service_type_support_t>`
`66`	`66`	`{`
`67`		`- typedef typesupport_service_tag type_tag;`
	`67`	`+ using type_tag = typesupport_service_tag;`
`68`	`68`	`};`
`69`	`69`
`70`	`70`	`template<>`
`71`	`71`	`struct typesupport_traits<rosidl_action_type_support_t>`
`72`	`72`	`{`
`73`		`- typedef typesupport_action_tag type_tag;`
	`73`	`+ using type_tag = typesupport_action_tag;`
`74`	`74`	`};`
`75`	`75`
`76`	`76`	`using SymbolNameErrorFuncPair = std::pair<std::string, std::function<std::string()>>;`
`@@ -132,7 +132,6 @@ get_typesupport_handle(`
`132`	`132`	`}`
`133`	`133`	`}`
`134`	`134`
`135`		`-`
`136`	`135`	`} // namespace rclcpp`
`137`	`136`
`138`	`137`	`#endif // RCLCPP__TYPESUPPORT_HELPERS_HPP_`