Replace typedef with using

extras/tests/JsonDocument/ElementProxy.cpp

@@ -7,7 +7,7 @@
 
 #include "Literals.hpp"
 
-typedef ArduinoJson::detail::ElementProxy<JsonDocument&> ElementProxy;
+using ElementProxy = ArduinoJson::detail::ElementProxy<JsonDocument&>;
 
 TEST_CASE("ElementProxy::add()") {
   JsonDocument doc;

extras/tests/JsonDocument/MemberProxy.cpp

@@ -14,8 +14,8 @@
 using ArduinoJson::detail::sizeofArray;
 using ArduinoJson::detail::sizeofObject;
 
-typedef ArduinoJson::detail::MemberProxy<JsonDocument&, const char*>
+using MemberProxy =
-    MemberProxy;
+    ArduinoJson::detail::MemberProxy<JsonDocument&, const char*>;
 
 TEST_CASE("MemberProxy::add()") {
   JsonDocument doc;

extras/tests/JsonVariant/stl_containers.cpp

@@ -99,7 +99,7 @@ TEST_CASE("vector<int>") {
 }
 
 TEST_CASE("array<int, 2>") {
-  typedef std::array<int, 2> array_type;
+  using array_type = std::array<int, 2>;
 
   SECTION("toJson") {
     array_type v;

extras/tests/Misc/custom_string.hpp

@@ -8,4 +8,4 @@
 
 struct custom_char_traits : std::char_traits<char> {};
 
-typedef std::basic_string<char, custom_char_traits> custom_string;
+using custom_string = std::basic_string<char, custom_char_traits>;

src/ArduinoJson/Array/JsonArray.hpp

@@ -17,7 +17,7 @@ class JsonArray : public detail::VariantOperators<JsonArray> {
   friend class detail::VariantAttorney;
 
  public:
-  typedef JsonArrayIterator iterator;
+  using iterator = JsonArrayIterator;
 
   // Constructs an unbound reference.
   JsonArray() : data_(0), resources_(0) {}

src/ArduinoJson/Array/JsonArrayConst.hpp

@@ -19,7 +19,7 @@ class JsonArrayConst : public detail::VariantOperators<JsonArrayConst> {
   friend class detail::VariantAttorney;
 
  public:
-  typedef JsonArrayConstIterator iterator;
+  using iterator = JsonArrayConstIterator;
 
   // Returns an iterator to the first element of the array.
   // https://arduinojson.org/v7/api/jsonarrayconst/begin/

src/ArduinoJson/Json/PrettyJsonSerializer.hpp

@@ -13,7 +13,7 @@ ARDUINOJSON_BEGIN_PRIVATE_NAMESPACE
 
 template <typename TWriter>
 class PrettyJsonSerializer : public JsonSerializer<TWriter> {
-  typedef JsonSerializer<TWriter> base;
+  using base = JsonSerializer<TWriter>;
 
  public:
   PrettyJsonSerializer(TWriter writer, const ResourceManager* resources)

src/ArduinoJson/Json/TextFormatter.hpp

@@ -105,7 +105,7 @@ class TextFormatter {
 
   template <typename T>
   enable_if_t<is_signed<T>::value> writeInteger(T value) {
-    typedef make_unsigned_t<T> unsigned_type;
+    using unsigned_type = make_unsigned_t<T>;
     unsigned_type unsigned_value;
     if (value < 0) {
       writeRaw('-');

src/ArduinoJson/Numbers/FloatParts.hpp

@@ -20,7 +20,7 @@ struct FloatParts {
 
 template <typename TFloat>
 inline int16_t normalize(TFloat& value) {
-  typedef FloatTraits<TFloat> traits;
+  using traits = FloatTraits<TFloat>;
   int16_t powersOf10 = 0;
 
   int8_t index = sizeof(TFloat) == 8 ? 8 : 5;

src/ArduinoJson/Numbers/FloatTraits.hpp

@@ -21,12 +21,12 @@ struct FloatTraits {};
 
 template <typename T>
 struct FloatTraits<T, 8 /*64bits*/> {
-  typedef uint64_t mantissa_type;
+  using mantissa_type = uint64_t;
   static const short mantissa_bits = 52;
   static const mantissa_type mantissa_max =
       (mantissa_type(1) << mantissa_bits) - 1;
 
-  typedef int16_t exponent_type;
+  using exponent_type = int16_t;
   static const exponent_type exponent_max = 308;
 
   static pgm_ptr<T> positiveBinaryPowersOfTen() {
@@ -105,12 +105,12 @@ struct FloatTraits<T, 8 /*64bits*/> {
 
 template <typename T>
 struct FloatTraits<T, 4 /*32bits*/> {
-  typedef uint32_t mantissa_type;
+  using mantissa_type = uint32_t;
   static const short mantissa_bits = 23;
   static const mantissa_type mantissa_max =
       (mantissa_type(1) << mantissa_bits) - 1;
 
-  typedef int8_t exponent_type;
+  using exponent_type = int8_t;
   static const exponent_type exponent_max = 38;
 
   static pgm_ptr<T> positiveBinaryPowersOfTen() {

src/ArduinoJson/Numbers/JsonFloat.hpp

@@ -10,9 +10,9 @@
 ARDUINOJSON_BEGIN_PUBLIC_NAMESPACE
 
 #if ARDUINOJSON_USE_DOUBLE
-typedef double JsonFloat;
+using JsonFloat = double;
 #else
-typedef float JsonFloat;
+using JsonFloat = float;
 #endif
 
 ARDUINOJSON_END_PUBLIC_NAMESPACE

src/ArduinoJson/Numbers/JsonInteger.hpp

@@ -12,11 +12,11 @@
 ARDUINOJSON_BEGIN_PUBLIC_NAMESPACE
 
 #if ARDUINOJSON_USE_LONG_LONG
-typedef int64_t JsonInteger;
+using JsonInteger = int64_t;
-typedef uint64_t JsonUInt;
+using JsonUInt = uint64_t;
 #else
-typedef long JsonInteger;
+using JsonInteger = long;
-typedef unsigned long JsonUInt;
+using JsonUInt = unsigned long;
 #endif
 
 ARDUINOJSON_END_PUBLIC_NAMESPACE

src/ArduinoJson/Numbers/parseNumber.hpp

@@ -103,9 +103,9 @@ class Number {
 };
 
 inline Number parseNumber(const char* s) {
-  typedef FloatTraits<JsonFloat> traits;
+  using traits = FloatTraits<JsonFloat>;
-  typedef largest_type<traits::mantissa_type, JsonUInt> mantissa_t;
+  using mantissa_t = largest_type<traits::mantissa_type, JsonUInt>;
-  typedef traits::exponent_type exponent_t;
+  using exponent_t = traits::exponent_type;
 
   ARDUINOJSON_ASSERT(s != 0);
 

src/ArduinoJson/Object/JsonObject.hpp

@@ -17,7 +17,7 @@ class JsonObject : public detail::VariantOperators<JsonObject> {
   friend class detail::VariantAttorney;
 
  public:
-  typedef JsonObjectIterator iterator;
+  using iterator = JsonObjectIterator;
 
   // Creates an unbound reference.
   JsonObject() : data_(0), resources_(0) {}

src/ArduinoJson/Object/JsonObjectConst.hpp

@@ -16,7 +16,7 @@ class JsonObjectConst : public detail::VariantOperators<JsonObjectConst> {
   friend class detail::VariantAttorney;
 
  public:
-  typedef JsonObjectConstIterator iterator;
+  using iterator = JsonObjectConstIterator;
 
   // Creates an unbound reference.
   JsonObjectConst() : data_(0), resources_(0) {}

src/ArduinoJson/Polyfills/integer.hpp

@@ -15,17 +15,17 @@ struct uint_;
 
 template <>
 struct uint_<8> {
-  typedef uint8_t type;
+  using type = uint8_t;
 };
 
 template <>
 struct uint_<16> {
-  typedef uint16_t type;
+  using type = uint16_t;
 };
 
 template <>
 struct uint_<32> {
-  typedef uint32_t type;
+  using type = uint32_t;
 };
 
 template <int Bits>

src/ArduinoJson/Polyfills/type_traits/conditional.hpp

@@ -10,12 +10,12 @@ ARDUINOJSON_BEGIN_PRIVATE_NAMESPACE
 
 template <bool Condition, class TrueType, class FalseType>
 struct conditional {
-  typedef TrueType type;
+  using type = TrueType;
 };
 
 template <class TrueType, class FalseType>
 struct conditional<false, TrueType, FalseType> {
-  typedef FalseType type;
+  using type = FalseType;
 };
 
 template <bool Condition, class TrueType, class FalseType>

src/ArduinoJson/Polyfills/type_traits/enable_if.hpp

@@ -14,7 +14,7 @@ struct enable_if {};
 
 template <typename T>
 struct enable_if<true, T> {
-  typedef T type;
+  using type = T;
 };
 
 template <bool Condition, typename T = void>

src/ArduinoJson/Polyfills/type_traits/remove_const.hpp

@@ -11,11 +11,11 @@ ARDUINOJSON_BEGIN_PRIVATE_NAMESPACE
 // A meta-function that return the type T without the const modifier
 template <typename T>
 struct remove_const {
-  typedef T type;
+  using type = T;
 };
 template <typename T>
 struct remove_const<const T> {
-  typedef T type;
+  using type = T;
 };
 
 template <typename T>

src/ArduinoJson/Polyfills/type_traits/remove_cv.hpp

@@ -10,19 +10,19 @@ ARDUINOJSON_BEGIN_PRIVATE_NAMESPACE
 
 template <typename T>
 struct remove_cv {
-  typedef T type;
+  using type = T;
 };
 template <typename T>
 struct remove_cv<const T> {
-  typedef T type;
+  using type = T;
 };
 template <typename T>
 struct remove_cv<volatile T> {
-  typedef T type;
+  using type = T;
 };
 template <typename T>
 struct remove_cv<const volatile T> {
-  typedef T type;
+  using type = T;
 };
 
 template <typename T>

src/ArduinoJson/Polyfills/type_traits/remove_reference.hpp

@@ -11,11 +11,11 @@ ARDUINOJSON_BEGIN_PRIVATE_NAMESPACE
 // A meta-function that return the type T without the reference modifier.
 template <typename T>
 struct remove_reference {
-  typedef T type;
+  using type = T;
 };
 template <typename T>
 struct remove_reference<T&> {
-  typedef T type;
+  using type = T;
 };
 
 template <typename T>

src/ArduinoJson/Polyfills/type_traits/type_identity.hpp

@@ -10,7 +10,7 @@ ARDUINOJSON_BEGIN_PRIVATE_NAMESPACE
 
 template <typename T>
 struct type_identity {
-  typedef T type;
+  using type = T;
 };
 
 ARDUINOJSON_END_PRIVATE_NAMESPACE

src/ArduinoJson/Strings/Adapters/FlashString.hpp

@@ -74,7 +74,7 @@ class FlashString {
 
 template <>
 struct StringAdapter<const __FlashStringHelper*, void> {
-  typedef FlashString AdaptedString;
+  using AdaptedString = FlashString;
 
   static AdaptedString adapt(const __FlashStringHelper* s) {
     return AdaptedString(s, s ? strlen_P(reinterpret_cast<const char*>(s)) : 0);
@@ -83,7 +83,7 @@ struct StringAdapter<const __FlashStringHelper*, void> {
 
 template <>
 struct SizedStringAdapter<const __FlashStringHelper*, void> {
-  typedef FlashString AdaptedString;
+  using AdaptedString = FlashString;
 
   static AdaptedString adapt(const __FlashStringHelper* s, size_t n) {
     return AdaptedString(s, n);

src/ArduinoJson/Strings/Adapters/JsonString.hpp

@@ -25,7 +25,7 @@ class JsonStringAdapter : public SizedRamString {
 
 template <>
 struct StringAdapter<JsonString> {
-  typedef JsonStringAdapter AdaptedString;
+  using AdaptedString = JsonStringAdapter;
 
   static AdaptedString adapt(const JsonString& s) {
     return AdaptedString(s);

src/ArduinoJson/Strings/Adapters/RamString.hpp

@@ -63,7 +63,7 @@ class ZeroTerminatedRamString {
 
 template <typename TChar>
 struct StringAdapter<TChar*, enable_if_t<IsChar<TChar>::value>> {
-  typedef ZeroTerminatedRamString AdaptedString;
+  using AdaptedString = ZeroTerminatedRamString;
 
   static AdaptedString adapt(const TChar* p) {
     return AdaptedString(reinterpret_cast<const char*>(p));
@@ -72,7 +72,7 @@ struct StringAdapter<TChar*, enable_if_t<IsChar<TChar>::value>> {
 
 template <typename TChar, size_t N>
 struct StringAdapter<TChar[N], enable_if_t<IsChar<TChar>::value>> {
-  typedef ZeroTerminatedRamString AdaptedString;
+  using AdaptedString = ZeroTerminatedRamString;
 
   static AdaptedString adapt(const TChar* p) {
     return AdaptedString(reinterpret_cast<const char*>(p));
@@ -90,7 +90,7 @@ class StaticStringAdapter : public ZeroTerminatedRamString {
 
 template <>
 struct StringAdapter<const char*, void> {
-  typedef StaticStringAdapter AdaptedString;
+  using AdaptedString = StaticStringAdapter;
 
   static AdaptedString adapt(const char* p) {
     return AdaptedString(p);
@@ -132,7 +132,7 @@ class SizedRamString {
 
 template <typename TChar>
 struct SizedStringAdapter<TChar*, enable_if_t<IsChar<TChar>::value>> {
-  typedef SizedRamString AdaptedString;
+  using AdaptedString = SizedRamString;
 
   static AdaptedString adapt(const TChar* p, size_t n) {
     return AdaptedString(reinterpret_cast<const char*>(p), n);

src/ArduinoJson/Strings/Adapters/StringObject.hpp

@@ -15,7 +15,7 @@ struct StringAdapter<
     T,
     enable_if_t<(string_traits<T>::has_cstr || string_traits<T>::has_data) &&
                 (string_traits<T>::has_length || string_traits<T>::has_size)>> {
-  typedef SizedRamString AdaptedString;
+  using AdaptedString = SizedRamString;
 
   static AdaptedString adapt(const T& s) {
     return AdaptedString(get_data(s), get_size(s));

src/ArduinoJson/Variant/JsonVariantCopier.hpp

@@ -11,7 +11,7 @@ ARDUINOJSON_BEGIN_PRIVATE_NAMESPACE
 
 class JsonVariantCopier {
  public:
-  typedef bool result_type;
+  using result_type = bool;
 
   JsonVariantCopier(JsonVariant dst) : dst_(dst) {}
 

src/ArduinoJson/Variant/JsonVariantVisitor.hpp

@@ -13,7 +13,7 @@ ARDUINOJSON_BEGIN_PRIVATE_NAMESPACE
 
 template <typename TResult>
 struct JsonVariantVisitor {
-  typedef TResult result_type;
+  using result_type = TResult;
 
   template <typename T>
   TResult visit(const T&) {

src/ArduinoJson/Variant/VariantDataVisitor.hpp

@@ -13,7 +13,7 @@ ARDUINOJSON_BEGIN_PRIVATE_NAMESPACE
 
 template <typename TResult>
 struct VariantDataVisitor {
-  typedef TResult result_type;
+  using result_type = TResult;
 
   template <typename T>
   TResult visit(const T&) {

src/ArduinoJson/Variant/VariantTo.hpp

@@ -20,15 +20,15 @@ struct VariantTo {};
 
 template <>
 struct VariantTo<JsonArray> {
-  typedef JsonArray type;
+  using type = JsonArray;
 };
 template <>
 struct VariantTo<JsonObject> {
-  typedef JsonObject type;
+  using type = JsonObject;
 };
 template <>
 struct VariantTo<JsonVariant> {
-  typedef JsonVariant type;
+  using type = JsonVariant;
 };
 
 ARDUINOJSON_END_PRIVATE_NAMESPACE