util/ConstBuffer, ...: use `using` instead of `typedef`

src/util/ConstBuffer.hxx

@@ -44,11 +44,11 @@ struct ConstBuffer;
 template<>
 struct ConstBuffer<void> {
 	typedef std::size_t size_type;
-	typedef void value_type;
-	typedef const void *pointer;
-	typedef pointer const_pointer;
-	typedef pointer iterator;
-	typedef pointer const_iterator;
+	using value_type = void;
+	using pointer = const void *;
+	using const_pointer = pointer;
+	using iterator = pointer;
+	using const_iterator = pointer;
 
 	pointer data;
 	size_type size;
@@ -91,14 +91,14 @@ struct ConstBuffer<void> {
  */
 template<typename T>
 struct ConstBuffer {
-	typedef std::size_t size_type;
-	typedef T value_type;
-	typedef const T &reference;
-	typedef reference const_reference;
-	typedef const T *pointer;
-	typedef pointer const_pointer;
-	typedef pointer iterator;
-	typedef pointer const_iterator;
+	using size_type = std::size_t;
+	using value_type = T;
+	using reference = const T &;
+	using const_reference = reference;
+	using pointer = const T *;
+	using const_pointer = pointer;
+	using iterator = pointer;
+	using const_iterator = pointer;
 
 	pointer data;
 	size_type size;

src/util/StringBuffer.hxx

@@ -39,19 +39,19 @@ template<typename T, std::size_t CAPACITY>
 class BasicStringBuffer {
 public:
 	typedef T value_type;
-	typedef T &reference;
-	typedef T *pointer;
-	typedef const T *const_pointer;
-	typedef std::size_t size_type;
+	using reference = T &;
+	using pointer = T *;
+	using const_pointer = const T *;
+	using size_type = std::size_t;
 
 	static constexpr value_type SENTINEL = '\0';
 
 protected:
-	typedef std::array<value_type, CAPACITY> Array;
+	using Array = std::array<value_type, CAPACITY>;
 	Array the_data;
 
 public:
-	typedef typename Array::const_iterator const_iterator;
+	using const_iterator = typename Array::const_iterator;
 
 	constexpr size_type capacity() const noexcept {
 		return CAPACITY;

src/util/WritableBuffer.hxx

@@ -45,11 +45,11 @@ struct WritableBuffer;
 template<>
 struct WritableBuffer<void> {
 	typedef std::size_t size_type;
-	typedef void value_type;
-	typedef void *pointer;
-	typedef const void *const_pointer;
-	typedef pointer iterator;
-	typedef const_pointer const_iterator;
+	using value_type = void;
+	using pointer = void *;
+	using const_pointer = const void *;
+	using iterator = pointer;
+	using const_iterator = const_pointer;
 
 	pointer data;
 	size_type size;
@@ -90,14 +90,14 @@ struct WritableBuffer<void> {
  */
 template<typename T>
 struct WritableBuffer {
-	typedef std::size_t size_type;
-	typedef T value_type;
-	typedef T &reference;
-	typedef const T &const_reference;
-	typedef T *pointer;
-	typedef const T *const_pointer;
-	typedef pointer iterator;
-	typedef const_pointer const_iterator;
+	using size_type = std::size_t;
+	using value_type = T;
+	using reference = T &;
+	using const_reference = const T &;
+	using pointer = T *;
+	using const_pointer = const T *;
+	using iterator = pointer;
+	using const_iterator = const_pointer;
 
 	pointer data;
 	size_type size;