Set version to 6.9.0

ArduinoJson.h

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #include "src/ArduinoJson.h"

CHANGELOG.md

@@ -1,6 +1,90 @@
 ArduinoJson: change log
 =======================
 
+v6.9.0 (2019-02-26)
+------
+
+* Decode escaped Unicode characters like \u00DE (issue #304, PR #791)
+  Many thanks to Daniel Schulte (aka @trilader) who implemented this feature.
+* Added option ARDUINOJSON_DECODE_UNICODE to enable it
+* Converted `JsonArray::copyFrom()/copyTo()` to free functions `copyArray()`
+* Renamed `JsonArray::copyFrom()` and `JsonObject::copyFrom()` to `set()`
+* Renamed `JsonArray::get()` to `getElement()`
+* Renamed `JsonArray::add()` (without arg) to `addElement()`
+* Renamed `JsonObject::get()` to `getMember()`
+* Renamed `JsonObject::getOrCreate()` to `getOrAddMember()`
+* Fixed `JsonVariant::isNull()` not returning `true` after `set((char*)0)`
+* Fixed segfault after `variant.set(serialized((char*)0))`
+* Detect `IncompleteInput` in `false`, `true`, and `null`
+* Added `JsonDocument::size()`
+* Added `JsonDocument::remove()`
+* Added `JsonVariant::clear()`
+* Added `JsonVariant::remove()`
+
+v6.8.0-beta (2019-01-30)
+-----------
+
+* Import functions in the ArduinoJson namespace to get clearer errors
+* Improved syntax highlighting in Arduino IDE
+* Removed default capacity of `DynamicJsonDocument`
+* `JsonArray::copyFrom()` accepts `JsonArrayConst`
+* `JsonVariant::set()` accepts `JsonArrayConst` and `JsonObjectConst`
+* `JsonDocument` was missing in the ArduinoJson namespace
+* Added `memoryUsage()` to `JsonArray`, `JsonObject`, and `JsonVariant`
+* Added `nesting()` to `JsonArray`, `JsonDocument`, `JsonObject`, and `JsonVariant`
+* Replaced `JsonDocument::nestingLimit` with an additional parameter
+  to `deserializeJson()` and `deserializeMsgPack()`
+* Fixed uninitialized variant in `JsonDocument`
+* Fixed `StaticJsonDocument` copy constructor and copy assignment
+* The copy constructor of `DynamicJsonDocument` chooses the capacity according to the memory usage of the source, not from the capacity of the source.
+* Added the ability to create/assign a `StaticJsonDocument`/`DynamicJsonDocument` from a `JsonArray`/`JsonObject`/`JsonVariant`
+* Added `JsonDocument::isNull()`
+* Added `JsonDocument::operator[]`
+* Added `ARDUINOJSON_TAB` to configure the indentation character
+* Reduced the size of the pretty JSON serializer
+* Added `add()`, `createNestedArray()` and `createNestedObject()` to `JsonVariant`
+* `JsonVariant` automatically promotes to `JsonObject` or `JsonArray` on write.
+  Calling `JsonVariant::to<T>()` is not required anymore.
+* `JsonDocument` now support the same operations as `JsonVariant`.
+  Calling `JsonDocument::as<T>()` is not required anymore.
+* Fixed example `JsonHttpClient.ino`
+* User can now use a `JsonString` as a key or a value
+
+> ### BREAKING CHANGES
+> 
+> #### `DynamicJsonDocument`'s constructor
+> 
+> The parameter to the constructor of `DynamicJsonDocument` is now mandatory
+>
+> Old code:
+>
+> ```c++
+> DynamicJsonDocument doc;
+> ```
+>
+> New code:
+>
+> ```c++
+> DynamicJsonDocument doc(1024);
+> ```
+> 
+> #### Nesting limit
+> 
+> `JsonDocument::nestingLimit` was replaced with a new parameter to `deserializeJson()` and `deserializeMsgPack()`.
+> 
+> Old code:
+> 
+> ```c++
+> doc.nestingLimit = 15;
+> deserializeJson(doc, input);
+> ```
+> 
+> New code: 
+> 
+> ```c++
+> deserializeJson(doc, input, DeserializationOption::NestingLimit(15));
+> ```
+
 v6.7.0-beta (2018-12-07)
 -----------
 

CMakeLists.txt

@@ -1,5 +1,5 @@
 # ArduinoJson - arduinojson.org
-# Copyright Benoit Blanchon 2014-2018
+# Copyright Benoit Blanchon 2014-2019
 # MIT License
 
 cmake_minimum_required(VERSION 3.0)

LICENSE.md

@@ -1,7 +1,7 @@
 The MIT License (MIT)
 ---------------------
 
-Copyright © 2014-2018 Benoit BLANCHON
+Copyright © 2014-2019 Benoit BLANCHON
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 

README.md

@@ -2,7 +2,11 @@
 
 ---
 
-[![Build status](https://ci.appveyor.com/api/projects/status/m7s53wav1l0abssg/branch/6.x?svg=true)](https://ci.appveyor.com/project/bblanchon/arduinojson/branch/6.x) [![Build Status](https://travis-ci.org/bblanchon/ArduinoJson.svg?branch=6.x)](https://travis-ci.org/bblanchon/ArduinoJson) [![Coverage Status](https://img.shields.io/coveralls/bblanchon/ArduinoJson.svg)](https://coveralls.io/r/bblanchon/ArduinoJson?branch=6.x) [![Star this project](http://githubbadges.com/star.svg?user=bblanchon&repo=ArduinoJson&style=flat&color=fff&background=007ec6)](https://github.com/bblanchon/ArduinoJson)
+[![arduino-library-badge](https://www.ardu-badge.com/badge/ArduinoJson.svg?version=6.9.0)](https://www.ardu-badge.com/ArduinoJson/6.9.0)
+[![Build Status](https://ci.appveyor.com/api/projects/status/m7s53wav1l0abssg/branch/6.x?svg=true)](https://ci.appveyor.com/project/bblanchon/arduinojson/branch/6.x)
+[![Build Status](https://travis-ci.org/bblanchon/ArduinoJson.svg?branch=6.x)](https://travis-ci.org/bblanchon/ArduinoJson)
+[![Coverage Status](https://coveralls.io/repos/github/bblanchon/ArduinoJson/badge.svg?branch=6.x)](https://coveralls.io/github/bblanchon/ArduinoJson?branch=6.x)
+[![Star this project](http://githubbadges.com/star.svg?user=bblanchon&repo=ArduinoJson&style=flat&color=fff&background=007ec6)](https://github.com/bblanchon/ArduinoJson)
 
 ArduinoJson is a C++ JSON library for Arduino and IoT (Internet Of Things).
 
@@ -60,7 +64,7 @@ Here is a program that parses a JSON document with ArduinoJson.
 ```c++
 char json[] = "{\"sensor\":\"gps\",\"time\":1351824120,\"data\":[48.756080,2.302038]}";
 
-DynamicJsonDocument doc;
+DynamicJsonDocument doc(1024);
 deserializeJson(doc, json);
 
 JsonObjectRef root = doc.as<JsonObject>();
@@ -77,7 +81,7 @@ See the [tutorial on arduinojson.org](https://arduinojson.org/doc/decoding/?utm_
 Here is a program that generates a JSON document with ArduinoJson:
 
 ```c++
-DynamicJsonDocument doc;
+DynamicJsonDocument doc(1024);
 
 JsonObject root = doc.to<JsonObject>();
 root["sensor"] = "gps";

examples/JsonConfigFile/JsonConfigFile.ino

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 //
 // This example shows how to store your project configuration in a file.
@@ -15,7 +15,11 @@
 #include <SD.h>
 #include <SPI.h>
 
-// Configuration that we'll store on disk
+// Our configuration structure.
+//
+// Never use a JsonDocument to store the configuration!
+// A JsonDocument is *not* a permanent storage; it's only a temporary storage
+// used during the serialization phase.
 struct Config {
   char hostname[64];
   int port;
@@ -29,9 +33,9 @@ void loadConfiguration(const char *filename, Config &config) {
   // Open file for reading
   File file = SD.open(filename);
 
-  // Allocate the document on the stack.
+  // Allocate a temporary JsonDocument
   // Don't forget to change the capacity to match your requirements.
-  // Use arduinojson.org/assistant to compute the capacity.
+  // Use arduinojson.org/v6/assistant to compute the capacity.
   StaticJsonDocument<512> doc;
 
   // Deserialize the JSON document
@@ -39,16 +43,13 @@ void loadConfiguration(const char *filename, Config &config) {
   if (error)
     Serial.println(F("Failed to read file, using default configuration"));
 
-  // Get the root object in the document
-  JsonObject root = doc.as<JsonObject>();
-
-  // Copy values from the JsonObject to the Config
-  config.port = root["port"] | 2731;
+  // Copy values from the JsonDocument to the Config
+  config.port = doc["port"] | 2731;
   strlcpy(config.hostname,                  // <- destination
-          root["hostname"] | "example.com",  // <- source
+          doc["hostname"] | "example.com",  // <- source
           sizeof(config.hostname));         // <- destination's capacity
 
-  // Close the file (File's destructor doesn't close the file)
+  // Close the file (Curiously, File's destructor doesn't close the file)
   file.close();
 }
 
@@ -64,24 +65,21 @@ void saveConfiguration(const char *filename, const Config &config) {
     return;
   }
 
-  // Allocate the document on the stack.
+  // Allocate a temporary JsonDocument
   // Don't forget to change the capacity to match your requirements.
   // Use arduinojson.org/assistant to compute the capacity.
   StaticJsonDocument<256> doc;
 
-  // Make our document contain an object
-  JsonObject root = doc.to<JsonObject>();
-
-  // Set the values in the object
-  root["hostname"] = config.hostname;
-  root["port"] = config.port;
+  // Set the values in the document
+  doc["hostname"] = config.hostname;
+  doc["port"] = config.port;
 
   // Serialize JSON to file
   if (serializeJson(doc, file) == 0) {
     Serial.println(F("Failed to write to file"));
   }
 
-  // Close the file (File's destructor doesn't close the file)
+  // Close the file
   file.close();
 }
 
@@ -100,7 +98,7 @@ void printFile(const char *filename) {
   }
   Serial.println();
 
-  // Close the file (File's destructor doesn't close the file)
+  // Close the file
   file.close();
 }
 

examples/JsonGeneratorExample/JsonGeneratorExample.ino

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 //
 // This example shows how to generate a JSON document with ArduinoJson.
@@ -15,7 +15,7 @@ void setup() {
   //
   // Inside the brackets, 200 is the RAM allocated to this document.
   // Don't forget to change this value to match your requirement.
-  // Use arduinojson.org/assistant to compute the capacity.
+  // Use arduinojson.org/v6/assistant to compute the capacity.
   StaticJsonDocument<200> doc;
 
   // StaticJsonObject allocates memory on the stack, it can be
@@ -23,30 +23,30 @@ void setup() {
   //
   // DynamicJsonDocument  doc(200);
 
-  // Make our document be an object
-  JsonObject root = doc.to<JsonObject>();
-
-  // Add values in the object
+  // Add values in the document
   //
-  // Most of the time, you can rely on the implicit casts.
-  // In other case, you can do root.set<long>("time", 1351824120);
-  root["sensor"] = "gps";
-  root["time"] = 1351824120;
+  doc["sensor"] = "gps";
+  doc["time"] = 1351824120;
 
   // Add an array.
   //
-  JsonArray data = root.createNestedArray("data");
+  JsonArray data = doc.createNestedArray("data");
   data.add(48.756080);
   data.add(2.302038);
 
-  serializeJson(root, Serial);
-  // This prints:
+  // Generate the minified JSON and send it to the Serial port.
+  //
+  serializeJson(doc, Serial);
+  // The above line prints:
   // {"sensor":"gps","time":1351824120,"data":[48.756080,2.302038]}
 
+  // Start a new line
   Serial.println();
 
-  serializeJsonPretty(root, Serial);
-  // This prints:
+  // Generate the prettified JSON and send it to the Serial port.
+  //
+  serializeJsonPretty(doc, Serial);
+  // The above line prints:
   // {
   //   "sensor": "gps",
   //   "time": 1351824120,

examples/JsonHttpClient/JsonHttpClient.ino

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 //
 // This example shows how to parse a JSON document in an HTTP response.
@@ -71,7 +71,7 @@ void setup() {
   }
 
   // Allocate the JSON document
-  // Use arduinojson.org/assistant to compute the capacity.
+  // Use arduinojson.org/v6/assistant to compute the capacity.
   const size_t capacity = JSON_OBJECT_SIZE(3) + JSON_ARRAY_SIZE(2) + 60;
   DynamicJsonDocument doc(capacity);
 
@@ -84,12 +84,11 @@ void setup() {
   }
 
   // Extract values
-  JsonObject root = doc.as<JsonObject>();
   Serial.println(F("Response:"));
-  Serial.println(root["sensor"].as<char*>());
-  Serial.println(root["time"].as<char*>());
-  Serial.println(root["data"][0].as<char*>());
-  Serial.println(root["data"][1].as<char*>());
+  Serial.println(doc["sensor"].as<char*>());
+  Serial.println(doc["time"].as<long>());
+  Serial.println(doc["data"][0].as<float>(), 6);
+  Serial.println(doc["data"][1].as<float>(), 6);
 
   // Disconnect
   client.stop();

examples/JsonParserExample/JsonParserExample.ino

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 //
 // This example shows how to deserialize a JSON document with ArduinoJson.
@@ -13,9 +13,9 @@ void setup() {
 
   // Allocate the JSON document
   //
-  // Inside the brackets, 200 is the size of the memory pool in bytes.
+  // Inside the brackets, 200 is the capacity of the memory pool in bytes.
   // Don't forget to change this value to match your JSON document.
-  // Use arduinojson.org/assistant to compute the capacity.
+  // Use arduinojson.org/v6/assistant to compute the capacity.
   StaticJsonDocument<200> doc;
 
   // StaticJsonDocument<N> allocates memory on the stack, it can be
@@ -25,9 +25,12 @@ void setup() {
 
   // JSON input string.
   //
-  // It's better to use a char[] as shown here.
-  // If you use a const char* or a String, ArduinoJson will
-  // have to make a copy of the input in the JsonBuffer.
+  // Using a char[], as shown here, enables the "zero-copy" mode. This mode uses
+  // the minimal amount of memory because the JsonDocument stores pointers to
+  // the input buffer.
+  // If you use another type of input, ArduinoJson must copy the strings from
+  // the input to the JsonDocument, so you need to increase the capacity of the
+  // JsonDocument.
   char json[] =
       "{\"sensor\":\"gps\",\"time\":1351824120,\"data\":[48.756080,2.302038]}";
 
@@ -41,17 +44,14 @@ void setup() {
     return;
   }
 
-  // Get the root object in the document
-  JsonObject root = doc.as<JsonObject>();
-
   // Fetch values.
   //
   // Most of the time, you can rely on the implicit casts.
-  // In other case, you can do root["time"].as<long>();
-  const char* sensor = root["sensor"];
-  long time = root["time"];
-  double latitude = root["data"][0];
-  double longitude = root["data"][1];
+  // In other case, you can do doc["time"].as<long>();
+  const char* sensor = doc["sensor"];
+  long time = doc["time"];
+  double latitude = doc["data"][0];
+  double longitude = doc["data"][1];
 
   // Print values.
   Serial.println(sensor);

examples/JsonServer/JsonServer.ino

@@ -1,16 +1,16 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 //
-// This example shows how to implement an HTTP server that sends JSON document
-// in the responses.
+// This example shows how to implement an HTTP server that sends a JSON document
+// in the response.
 // It uses the Ethernet library but can be easily adapted for Wifi.
 //
-// It sends the value of the analog and digital pins.
-// The JSON document looks like the following:
+// The JSON document contains the values of the analog and digital pins.
+// It looks like that:
 // {
-//   "analog": [ 0, 1, 2, 3, 4, 5 ],
-//   "digital": [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 ]
+//   "analog": [0, 76, 123, 158, 192, 205],
+//   "digital": [1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0]
 // }
 
 #include <ArduinoJson.h>
@@ -51,15 +51,12 @@ void loop() {
   // Read the request (we ignore the content in this example)
   while (client.available()) client.read();
 
-  // Allocate the JSON document
-  // Use arduinojson.org/assistant to compute the capacity.
+  // Allocate a temporary JsonDocument
+  // Use arduinojson.org/v6/assistant to compute the capacity.
   StaticJsonDocument<500> doc;
 
-  // Make our document represent an object
-  JsonObject root = doc.to<JsonObject>();
-
   // Create the "analog" array
-  JsonArray analogValues = root.createNestedArray("analog");
+  JsonArray analogValues = doc.createNestedArray("analog");
   for (int pin = 0; pin < 6; pin++) {
     // Read the analog input
     int value = analogRead(pin);
@@ -69,7 +66,7 @@ void loop() {
   }
 
   // Create the "digital" array
-  JsonArray digitalValues = root.createNestedArray("digital");
+  JsonArray digitalValues = doc.createNestedArray("digital");
   for (int pin = 0; pin < 14; pin++) {
     // Read the digital input
     int value = digitalRead(pin);
@@ -79,17 +76,19 @@ void loop() {
   }
 
   Serial.print(F("Sending: "));
-  serializeJson(root, Serial);
+  serializeJson(doc, Serial);
   Serial.println();
 
   // Write response headers
-  client.println("HTTP/1.0 200 OK");
-  client.println("Content-Type: application/json");
-  client.println("Connection: close");
+  client.println(F("HTTP/1.0 200 OK"));
+  client.println(F("Content-Type: application/json"));
+  client.println(F("Connection: close"));
+  client.print(F("Content-Length: "));
+  client.println(measureJsonPretty(doc));
   client.println();
 
   // Write JSON document
-  serializeJsonPretty(root, client);
+  serializeJsonPretty(doc, client);
 
   // Disconnect
   client.stop();

examples/JsonUdpBeacon/JsonUdpBeacon.ino

@@ -1,14 +1,14 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 //
 // This example shows how to send a JSON document to a UDP socket.
 // At regular interval, it sends a UDP packet that contains the status of
 // analog and digital pins.
-// The JSON document looks like the following:
+// It looks like that:
 // {
-//   "analog": [ 0, 1, 2, 3, 4, 5 ],
-//   "digital": [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 ]
+//   "analog": [0, 76, 123, 158, 192, 205],
+//   "digital": [1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0]
 // }
 //
 // If you want to test this program, you need to be able to receive the UDP
@@ -43,15 +43,12 @@ void setup() {
 }
 
 void loop() {
-  // Allocate the JSON document
-  // Use arduinojson.org/assistant to compute the capacity.
+  // Allocate a temporary JsonDocument
+  // Use arduinojson.org/v6/assistant to compute the capacity.
   StaticJsonDocument<500> doc;
 
-  // Make our document represent an object
-  JsonObject root = doc.to<JsonObject>();
-
   // Create the "analog" array
-  JsonArray analogValues = root.createNestedArray("analog");
+  JsonArray analogValues = doc.createNestedArray("analog");
   for (int pin = 0; pin < 6; pin++) {
     // Read the analog input
     int value = analogRead(pin);
@@ -61,7 +58,7 @@ void loop() {
   }
 
   // Create the "digital" array
-  JsonArray digitalValues = root.createNestedArray("digital");
+  JsonArray digitalValues = doc.createNestedArray("digital");
   for (int pin = 0; pin < 14; pin++) {
     // Read the digital input
     int value = digitalRead(pin);
@@ -75,11 +72,11 @@ void loop() {
   Serial.print(remoteIp);
   Serial.print(F(" on port "));
   Serial.println(remotePort);
-  serializeJson(root, Serial);
+  serializeJson(doc, Serial);
 
   // Send UDP packet
   udp.beginPacket(remoteIp, remotePort);
-  serializeJson(root, udp);
+  serializeJson(doc, udp);
   udp.println();
   udp.endPacket();
 

examples/MsgPackParser/MsgPackParser.ino

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 //
 // This example shows how to deserialize a MessagePack document with
@@ -14,9 +14,9 @@ void setup() {
 
   // Allocate the JSON document
   //
-  // Inside the brackets, 200 is the size of the memory pool in bytes.
+  // Inside the brackets, 200 is the capacity of the memory pool in bytes.
   // Don't forget to change this value to match your JSON document.
-  // Use arduinojson.org/assistant to compute the capacity.
+  // Use arduinojson.org/v6/assistant to compute the capacity.
   StaticJsonDocument<200> doc;
 
   // StaticJsonObject allocates memory on the stack, it can be
@@ -26,9 +26,12 @@ void setup() {
 
   // MessagePack input string.
   //
-  // It's better to use a char[] as shown here.
-  // If you use a const char* or a String, ArduinoJson will
-  // have to make a copy of the input in the JsonBuffer.
+  // Using a char[], as shown here, enables the "zero-copy" mode. This mode uses
+  // the minimal amount of memory because the JsonDocument stores pointers to
+  // the input buffer.
+  // If you use another type of input, ArduinoJson must copy the strings from
+  // the input to the JsonDocument, so you need to increase the capacity of the
+  // JsonDocument.
   uint8_t input[] = {131, 166, 115, 101, 110, 115, 111, 114, 163, 103, 112, 115,
                      164, 116, 105, 109, 101, 206, 80,  147, 50,  248, 164, 100,
                      97,  116, 97,  146, 203, 64,  72,  96,  199, 58,  188, 148,
@@ -40,31 +43,23 @@ void setup() {
   //   "data": [48.75608, 2.302038]
   // }
 
-  // doc of the object tree.
-  //
-  // It's a reference to the JsonObject, the actual bytes are inside the
-  // JsonBuffer with all the other nodes of the object tree.
-  // Memory is freed when jsonBuffer goes out of scope.
   DeserializationError error = deserializeMsgPack(doc, input);
 
-  // Test if parsing succeeds.
+  // Test if parsing succeeded.
   if (error) {
     Serial.print("deserializeMsgPack() failed: ");
     Serial.println(error.c_str());
     return;
   }
 
-  // Get the root object in the document
-  JsonObject root = doc.as<JsonObject>();
-
   // Fetch values.
   //
   // Most of the time, you can rely on the implicit casts.
-  // In other case, you can do root["time"].as<long>();
-  const char* sensor = root["sensor"];
-  long time = root["time"];
-  double latitude = root["data"][0];
-  double longitude = root["data"][1];
+  // In other case, you can do doc["time"].as<long>();
+  const char* sensor = doc["sensor"];
+  long time = doc["time"];
+  double latitude = doc["data"][0];
+  double longitude = doc["data"][1];
 
   // Print values.
   Serial.println(sensor);

examples/ProgmemExample/ProgmemExample.ino

@@ -1,12 +1,12 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 //
 // This example shows the different ways you can use Flash strings with
 // ArduinoJson.
 //
 // Use Flash strings sparingly, because ArduinoJson duplicates them in the
-// JsonBuffer. Prefer plain old char*, as they are more efficient in term of
+// JsonDocument. Prefer plain old char*, as they are more efficient in term of
 // code size, speed, and memory usage.
 
 #include <ArduinoJson.h>
@@ -14,11 +14,10 @@
 void setup() {
 #ifdef PROGMEM  // <- check that Flash strings are supported
 
-  DynamicJsonDocument doc;
+  DynamicJsonDocument doc(1024);
 
   // You can use a Flash String as your JSON input.
-  // WARNING: the content of the Flash String will be duplicated in the
-  // JsonBuffer.
+  // WARNING: the strings in the input will be duplicated in the JsonDocument.
   deserializeJson(doc, F("{\"sensor\":\"gps\",\"time\":1351824120,"
                          "\"data\":[48.756080,2.302038]}"));
   JsonObject obj = doc.as<JsonObject>();
@@ -29,12 +28,12 @@ void setup() {
 
   // You can use a Flash String to set an element of a JsonObject
   // WARNING: the content of the Flash String will be duplicated in the
-  // JsonBuffer.
+  // JsonDocument.
   obj[F("time")] = time;
 
   // You can set a Flash String to a JsonObject or JsonArray:
   // WARNING: the content of the Flash String will be duplicated in the
-  // JsonBuffer.
+  // JsonDocument.
   obj["sensor"] = F("gps");
 
   // It works with serialized() too:

examples/StringExample/StringExample.ino

@@ -1,20 +1,20 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 //
 // This example shows the different ways you can use String with ArduinoJson.
 //
 // Use String objects sparingly, because ArduinoJson duplicates them in the
-// JsonBuffer. Prefer plain old char[], as they are more efficient in term of
+// JsonDocument. Prefer plain old char[], as they are more efficient in term of
 // code size, speed, and memory usage.
 
 #include <ArduinoJson.h>
 
 void setup() {
-  DynamicJsonDocument doc;
+  DynamicJsonDocument doc(1024);
 
   // You can use a String as your JSON input.
-  // WARNING: the content of the String will be duplicated in the JsonBuffer.
+  // WARNING: the string in the input  will be duplicated in the JsonDocument.
   String input =
       "{\"sensor\":\"gps\",\"time\":1351824120,\"data\":[48.756080,2.302038]}";
   deserializeJson(doc, input);
@@ -25,11 +25,11 @@ void setup() {
   long time = obj[String("time")];
 
   // You can use a String to set an element of a JsonObject
-  // WARNING: the content of the String will be duplicated in the JsonBuffer.
+  // WARNING: the content of the String will be duplicated in the JsonDocument.
   obj[String("time")] = time;
 
   // You can get a String from a JsonObject or JsonArray:
-  // No duplication is done, at least not in the JsonBuffer.
+  // No duplication is done, at least not in the JsonDocument.
   String sensor = obj["sensor"];
 
   // Unfortunately, the following doesn't work (issue #118):
@@ -38,14 +38,14 @@ void setup() {
   sensor = obj["sensor"].as<String>();
 
   // You can set a String to a JsonObject or JsonArray:
-  // WARNING: the content of the String will be duplicated in the JsonBuffer.
+  // WARNING: the content of the String will be duplicated in the JsonDocument.
   obj["sensor"] = sensor;
 
   // It works with serialized() too:
   obj["sensor"] = serialized(sensor);
 
   // You can also concatenate strings
-  // WARNING: the content of the String will be duplicated in the JsonBuffer.
+  // WARNING: the content of the String will be duplicated in the JsonDocument.
   obj[String("sen") + "sor"] = String("gp") + "s";
 
   // You can compare the content of a JsonObject with a String

fuzzing/CMakeLists.txt

@@ -1,5 +1,5 @@
 # ArduinoJson - arduinojson.org
-# Copyright Benoit Blanchon 2014-2018
+# Copyright Benoit Blanchon 2014-2019
 # MIT License
 
 if(MSVC)

fuzzing/fuzzer_main.cpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 // This file is NOT use by Google's OSS fuzz

fuzzing/json_fuzzer.cpp

@@ -1,7 +1,7 @@
 #include <ArduinoJson.h>
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
-  DynamicJsonDocument doc;
+  DynamicJsonDocument doc(4096);
   DeserializationError error = deserializeJson(doc, data, size);
   if (!error) {
     std::string json;

fuzzing/msgpack_fuzzer.cpp

@@ -1,7 +1,7 @@
 #include <ArduinoJson.h>
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
-  DynamicJsonDocument doc;
+  DynamicJsonDocument doc(4096);
   DeserializationError error = deserializeMsgPack(doc, data, size);
   if (!error) {
     std::string json;

keywords.txt

@@ -1,17 +1,36 @@
+# Macros
+JSON_ARRAY_SIZE	KEYWORD2
+JSON_OBJECT_SIZE	KEYWORD2
+JSON_STRING_SIZE	KEYWORD2
+
+# Free functions
+deserializeJson	KEYWORD2
+deserializeMsgPack	KEYWORD2
+serialized	KEYWORD2
+serializeJson	KEYWORD2
+serializeJsonPretty	KEYWORD2
+serializeMsgPack	KEYWORD2
+
+# Methods
 add	KEYWORD2
 as	KEYWORD2
 createNestedArray	KEYWORD2
 createNestedObject	KEYWORD2
-deserializeJson	KEYWORD2
-deserializeMsgPack	KEYWORD2
-DynamicJsonDocument	KEYWORD1
 get	KEYWORD2
-JsonArray	KEYWORD1
-JsonObject	KEYWORD1
-JsonVariant	KEYWORD1
-serializeMsgPack	KEYWORD2
-serializeJson	KEYWORD2
-serializeJsonPretty	KEYWORD2
 set	KEYWORD2
-StaticJsonDocument	KEYWORD1
 to	KEYWORD2
+
+# Type names
+DeserializationError	KEYWORD1	DATA_TYPE
+DynamicJsonDocument	KEYWORD1	DATA_TYPE
+JsonArray	KEYWORD1	DATA_TYPE
+JsonArrayConst	KEYWORD1	DATA_TYPE
+JsonFloat	KEYWORD1	DATA_TYPE
+JsonInteger	KEYWORD1	DATA_TYPE
+JsonObject	KEYWORD1	DATA_TYPE
+JsonObjectConst	KEYWORD1	DATA_TYPE
+JsonString	KEYWORD1	DATA_TYPE
+JsonUInt	KEYWORD1	DATA_TYPE
+JsonVariant	KEYWORD1	DATA_TYPE
+JsonVariantConst	KEYWORD1	DATA_TYPE
+StaticJsonDocument	KEYWORD1	DATA_TYPE

library.json

@@ -7,7 +7,7 @@
     "type": "git",
     "url": "https://github.com/bblanchon/ArduinoJson.git"
   },
-  "version": "6.7.0-beta",
+  "version": "6.9.0",
   "authors": {
     "name": "Benoit Blanchon",
     "url": "https://blog.benoitblanchon.fr"

library.properties

@@ -1,5 +1,5 @@
 name=ArduinoJson
-version=6.7.0-beta
+version=6.9.0
 author=Benoit Blanchon <blog.benoitblanchon.fr>
 maintainer=Benoit Blanchon <blog.benoitblanchon.fr>
 sentence=An efficient and elegant JSON library for Arduino.

scripts/publish.sh

@@ -7,11 +7,15 @@ cd "$(dirname "$0")/.."
 VERSION="$1"
 DATE=$(date +%F)
 TAG="v$VERSION"
+VERSION_REGEX="[0-9a-z\\.\\-]+"
 
 update_version_in_source () {
 	IFS=".-" read MAJOR MINOR REVISION EXTRA < <(echo "$VERSION")
 	UNDERLINE=$(printf -- '-%.0s' $(seq 1 ${#TAG}))
 
+	sed -i~ -bE "s/version=$VERSION_REGEX/version=$VERSION/; s|ardu-badge.com/ArduinoJson/$VERSION_REGEX|ardu-badge.com/ArduinoJson/$VERSION|; " README.md
+	rm README.md*~
+
 	sed -i~ -bE "4s/HEAD/$TAG ($DATE)/; 5s/-+/$UNDERLINE/" CHANGELOG.md
 	rm CHANGELOG.md*~
 	sed -i~ -bE "s/\"version\":.*$/\"version\": \"$VERSION\",/" library.json
@@ -30,7 +34,7 @@ update_version_in_source () {
 }
 
 commit_new_version () {
-	git add src/ArduinoJson/version.hpp CHANGELOG.md library.json library.properties
+	git add src/ArduinoJson/version.hpp README.md CHANGELOG.md library.json library.properties
 	git commit -m "Set version to $VERSION"
 }
 

scripts/wandbox/JsonGeneratorExample.cpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 //
 // This example shows how to generate a JSON document with ArduinoJson.

scripts/wandbox/JsonParserExample.cpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 //
 // This example shows how to deserialize a JSON document with ArduinoJson.

scripts/wandbox/MsgPackParserExample.cpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 //
 // This example shows how to generate a JSON document with ArduinoJson.

src/ArduinoJson.h

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once
@@ -14,10 +14,11 @@
 #include "ArduinoJson/Document/StaticJsonDocument.hpp"
 
 #include "ArduinoJson/Array/ArrayImpl.hpp"
-#include "ArduinoJson/Array/ArraySubscript.hpp"
+#include "ArduinoJson/Array/ElementProxy.hpp"
+#include "ArduinoJson/Array/Utilities.hpp"
 #include "ArduinoJson/Collection/CollectionImpl.hpp"
+#include "ArduinoJson/Object/MemberProxy.hpp"
 #include "ArduinoJson/Object/ObjectImpl.hpp"
-#include "ArduinoJson/Object/ObjectSubscript.hpp"
 #include "ArduinoJson/Variant/VariantAsImpl.hpp"
 #include "ArduinoJson/Variant/VariantImpl.hpp"
 
@@ -28,19 +29,30 @@
 #include "ArduinoJson/MsgPack/MsgPackSerializer.hpp"
 
 namespace ArduinoJson {
-typedef ARDUINOJSON_NAMESPACE::ArrayRef JsonArray;
 typedef ARDUINOJSON_NAMESPACE::ArrayConstRef JsonArrayConst;
+typedef ARDUINOJSON_NAMESPACE::ArrayRef JsonArray;
 typedef ARDUINOJSON_NAMESPACE::Float JsonFloat;
 typedef ARDUINOJSON_NAMESPACE::Integer JsonInteger;
-typedef ARDUINOJSON_NAMESPACE::ObjectRef JsonObject;
 typedef ARDUINOJSON_NAMESPACE::ObjectConstRef JsonObjectConst;
+typedef ARDUINOJSON_NAMESPACE::ObjectRef JsonObject;
 typedef ARDUINOJSON_NAMESPACE::Pair JsonPair;
-typedef ARDUINOJSON_NAMESPACE::UInt JsonUInt;
-typedef ARDUINOJSON_NAMESPACE::VariantRef JsonVariant;
-typedef ARDUINOJSON_NAMESPACE::VariantConstRef JsonVariantConst;
 typedef ARDUINOJSON_NAMESPACE::String JsonString;
+typedef ARDUINOJSON_NAMESPACE::UInt JsonUInt;
+typedef ARDUINOJSON_NAMESPACE::VariantConstRef JsonVariantConst;
+typedef ARDUINOJSON_NAMESPACE::VariantRef JsonVariant;
+using ARDUINOJSON_NAMESPACE::copyArray;
 using ARDUINOJSON_NAMESPACE::DeserializationError;
+using ARDUINOJSON_NAMESPACE::deserializeJson;
+using ARDUINOJSON_NAMESPACE::deserializeMsgPack;
 using ARDUINOJSON_NAMESPACE::DynamicJsonDocument;
+using ARDUINOJSON_NAMESPACE::JsonDocument;
 using ARDUINOJSON_NAMESPACE::serialized;
+using ARDUINOJSON_NAMESPACE::serializeJson;
+using ARDUINOJSON_NAMESPACE::serializeJsonPretty;
+using ARDUINOJSON_NAMESPACE::serializeMsgPack;
 using ARDUINOJSON_NAMESPACE::StaticJsonDocument;
+
+namespace DeserializationOption {
+using ARDUINOJSON_NAMESPACE::NestingLimit;
+}
 }  // namespace ArduinoJson

src/ArduinoJson/Array/ArrayFunctions.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Array/ArrayImpl.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once
@@ -9,11 +9,14 @@
 
 namespace ARDUINOJSON_NAMESPACE {
 
-inline ArrayRef ArrayRef::createNestedArray() const {
-  return add().to<ArrayRef>();
+template <typename TArray>
+inline ArrayRef ArrayShortcuts<TArray>::createNestedArray() const {
+  return impl()->addElement().template to<ArrayRef>();
 }
 
-inline ObjectRef ArrayRef::createNestedObject() const {
-  return add().to<ObjectRef>();
+template <typename TArray>
+inline ObjectRef ArrayShortcuts<TArray>::createNestedObject() const {
+  return impl()->addElement().template to<ObjectRef>();
 }
+
 }  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/Array/ArrayIterator.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Array/ArrayRef.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once
@@ -16,11 +16,16 @@
 namespace ARDUINOJSON_NAMESPACE {
 
 class ObjectRef;
-class ArraySubscript;
+template <typename>
+class ElementProxy;
 
 template <typename TData>
 class ArrayRefBase {
  public:
+  operator VariantConstRef() const {
+    return VariantConstRef(reinterpret_cast<const VariantData*>(_data));
+  }
+
   template <typename Visitor>
   FORCE_INLINE void accept(Visitor& visitor) const {
     arrayAccept(_data, visitor);
@@ -30,8 +35,12 @@ class ArrayRefBase {
     return _data == 0;
   }
 
-  FORCE_INLINE VariantConstRef operator[](size_t index) const {
-    return VariantConstRef(_data ? _data->get(index) : 0);
+  FORCE_INLINE size_t memoryUsage() const {
+    return _data ? _data->memoryUsage() : 0;
+  }
+
+  FORCE_INLINE size_t nesting() const {
+    return _data ? _data->nesting() : 0;
   }
 
   FORCE_INLINE size_t size() const {
@@ -66,9 +75,15 @@ class ArrayConstRef : public ArrayRefBase<const CollectionData>,
   FORCE_INLINE bool operator==(ArrayConstRef rhs) const {
     return arrayEquals(_data, rhs._data);
   }
+
+  FORCE_INLINE VariantConstRef operator[](size_t index) const {
+    return VariantConstRef(_data ? _data->get(index) : 0);
+  }
 };
 
-class ArrayRef : public ArrayRefBase<CollectionData>, public Visitable {
+class ArrayRef : public ArrayRefBase<CollectionData>,
+                 public ArrayShortcuts<ArrayRef>,
+                 public Visitable {
   typedef ArrayRefBase<CollectionData> base_type;
 
  public:
@@ -86,28 +101,7 @@ class ArrayRef : public ArrayRefBase<CollectionData>, public Visitable {
     return ArrayConstRef(_data);
   }
 
-  // Adds the specified value at the end of the array.
-  //
-  // bool add(TValue);
-  // TValue = bool, long, int, short, float, double, serialized, VariantRef,
-  //          std::string, String, ObjectRef
-  template <typename T>
-  FORCE_INLINE bool add(const T& value) const {
-    return add().set(value);
-  }
-  // Adds the specified value at the end of the array.
-  FORCE_INLINE bool add(ArrayRef value) const {
-    return add().set(value);
-  }
-  //
-  // bool add(TValue);
-  // TValue = char*, const char*, const __FlashStringHelper*
-  template <typename T>
-  FORCE_INLINE bool add(T* value) const {
-    return add().set(value);
-  }
-
-  VariantRef add() const {
+  VariantRef addElement() const {
     return VariantRef(_pool, arrayAdd(_data, _pool));
   }
 
@@ -120,76 +114,18 @@ class ArrayRef : public ArrayRefBase<CollectionData>, public Visitable {
     return iterator();
   }
 
-  // Imports a 1D array
-  template <typename T, size_t N>
-  FORCE_INLINE bool copyFrom(T (&array)[N]) const {
-    return copyFrom(array, N);
-  }
-
-  // Imports a 1D array
-  template <typename T>
-  bool copyFrom(T* array, size_t len) const {
-    bool ok = true;
-    for (size_t i = 0; i < len; i++) {
-      ok &= add(array[i]);
-    }
-    return ok;
-  }
-
-  // Imports a 2D array
-  template <typename T, size_t N1, size_t N2>
-  bool copyFrom(T (&array)[N1][N2]) const {
-    bool ok = true;
-    for (size_t i = 0; i < N1; i++) {
-      ArrayRef nestedArray = createNestedArray();
-      for (size_t j = 0; j < N2; j++) {
-        ok &= nestedArray.add(array[i][j]);
-      }
-    }
-    return ok;
-  }
-
   // Copy a ArrayRef
-  FORCE_INLINE bool copyFrom(ArrayRef src) const {
+  FORCE_INLINE bool set(ArrayConstRef src) const {
     if (!_data || !src._data) return false;
     return _data->copyFrom(*src._data, _pool);
   }
 
-  // Exports a 1D array
-  template <typename T, size_t N>
-  FORCE_INLINE size_t copyTo(T (&array)[N]) const {
-    return copyTo(array, N);
-  }
-
-  // Exports a 1D array
-  template <typename T>
-  size_t copyTo(T* array, size_t len) const {
-    size_t i = 0;
-    for (iterator it = begin(); it != end() && i < len; ++it) array[i++] = *it;
-    return i;
-  }
-
-  // Exports a 2D array
-  template <typename T, size_t N1, size_t N2>
-  void copyTo(T (&array)[N1][N2]) const {
-    if (!_data) return;
-    size_t i = 0;
-    for (iterator it = begin(); it != end() && i < N1; ++it) {
-      it->as<ArrayRef>().copyTo(array[i++]);
-    }
-  }
-
-  FORCE_INLINE ArrayRef createNestedArray() const;
-  FORCE_INLINE ObjectRef createNestedObject() const;
-
-  FORCE_INLINE ArraySubscript operator[](size_t index) const;
-
   FORCE_INLINE bool operator==(ArrayRef rhs) const {
     return arrayEquals(_data, rhs._data);
   }
 
   // Gets the value at the specified index.
-  FORCE_INLINE VariantRef get(size_t index) const {
+  FORCE_INLINE VariantRef getElement(size_t index) const {
     return VariantRef(_pool, _data ? _data->get(index) : 0);
   }
 

src/ArduinoJson/Array/ArrayShortcuts.hpp

@@ -0,0 +1,47 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2019
+// MIT License
+
+#pragma once
+
+#include "../Polyfills/attributes.hpp"
+#include "../Polyfills/type_traits.hpp"
+
+namespace ARDUINOJSON_NAMESPACE {
+// Forward declarations.
+template <typename>
+class ElementProxy;
+
+template <typename TArray>
+class ArrayShortcuts {
+ public:
+  // Returns the element at specified index if the variant is an array.
+  FORCE_INLINE ElementProxy<const TArray &> operator[](size_t index) const;
+
+  FORCE_INLINE ObjectRef createNestedObject() const;
+
+  FORCE_INLINE ArrayRef createNestedArray() const;
+
+  // Adds the specified value at the end of the array.
+  //
+  // bool add(TValue);
+  // TValue = bool, long, int, short, float, double, serialized, VariantRef,
+  //          std::string, String, ObjectRef
+  template <typename T>
+  FORCE_INLINE bool add(const T &value) const {
+    return impl()->addElement().set(value);
+  }
+  //
+  // bool add(TValue);
+  // TValue = char*, const char*, const __FlashStringHelper*
+  template <typename T>
+  FORCE_INLINE bool add(T *value) const {
+    return impl()->addElement().set(value);
+  }
+
+ private:
+  const TArray *impl() const {
+    return static_cast<const TArray *>(this);
+  }
+};
+}  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/Array/ArraySubscript.hpp

@@ -1,112 +0,0 @@
-// ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
-// MIT License
-
-#pragma once
-
-#include "../Configuration.hpp"
-#include "../Operators/VariantOperators.hpp"
-
-#ifdef _MSC_VER
-#pragma warning(push)
-#pragma warning(disable : 4522)
-#endif
-
-namespace ARDUINOJSON_NAMESPACE {
-class ArraySubscript : public VariantOperators<ArraySubscript>,
-                       public Visitable {
- public:
-  FORCE_INLINE ArraySubscript(ArrayRef array, size_t index)
-      : _array(array), _index(index) {}
-
-  FORCE_INLINE ArraySubscript& operator=(const ArraySubscript& src) {
-    get_impl().set(src.as<VariantConstRef>());
-    return *this;
-  }
-
-  // Replaces the value
-  //
-  // operator=(const TValue&)
-  // TValue = bool, long, int, short, float, double, serialized, VariantRef,
-  //          std::string, String, ArrayRef, ObjectRef
-  template <typename T>
-  FORCE_INLINE ArraySubscript& operator=(const T& src) {
-    get_impl().set(src);
-    return *this;
-  }
-  //
-  // operator=(TValue)
-  // TValue = char*, const char*, const __FlashStringHelper*
-  template <typename T>
-  FORCE_INLINE ArraySubscript& operator=(T* src) {
-    get_impl().set(src);
-    return *this;
-  }
-
-  FORCE_INLINE bool isNull() const {
-    return get_impl().isNull();
-  }
-
-  template <typename T>
-  FORCE_INLINE typename VariantAs<T>::type as() const {
-    return get_impl().as<T>();
-  }
-
-  template <typename T>
-  FORCE_INLINE bool is() const {
-    return get_impl().is<T>();
-  }
-
-  template <typename T>
-  FORCE_INLINE typename VariantTo<T>::type to() const {
-    return get_impl().to<T>();
-  }
-
-  // Replaces the value
-  //
-  // bool set(const TValue&)
-  // TValue = bool, long, int, short, float, double, serialized, VariantRef,
-  //          std::string, String, ArrayRef, ObjectRef
-  template <typename TValue>
-  FORCE_INLINE bool set(const TValue& value) const {
-    return get_impl().set(value);
-  }
-  //
-  // bool set(TValue)
-  // TValue = char*, const char*, const __FlashStringHelper*
-  template <typename TValue>
-  FORCE_INLINE bool set(TValue* value) const {
-    return get_impl().set(value);
-  }
-
-  template <typename Visitor>
-  void accept(Visitor& visitor) const {
-    return get_impl().accept(visitor);
-  }
-
-  FORCE_INLINE size_t size() const {
-    return get_impl().size();
-  }
-
- private:
-  FORCE_INLINE VariantRef get_impl() const {
-    return _array.get(_index);
-  }
-
-  ArrayRef _array;
-  const size_t _index;
-};
-
-template <typename TImpl>
-inline ArraySubscript VariantSubscripts<TImpl>::operator[](size_t index) const {
-  return impl()->template as<ArrayRef>()[index];
-}
-
-inline ArraySubscript ArrayRef::operator[](size_t index) const {
-  return ArraySubscript(*this, index);
-}
-}  // namespace ARDUINOJSON_NAMESPACE
-
-#ifdef _MSC_VER
-#pragma warning(pop)
-#endif

src/ArduinoJson/Array/ElementProxy.hpp

@@ -0,0 +1,165 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2019
+// MIT License
+
+#pragma once
+
+#include "../Configuration.hpp"
+#include "../Operators/VariantOperators.hpp"
+
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable : 4522)
+#endif
+
+namespace ARDUINOJSON_NAMESPACE {
+
+template <typename TArray>
+class ElementProxy : public VariantOperators<ElementProxy<TArray> >,
+                     public Visitable {
+  typedef ElementProxy<TArray> this_type;
+
+ public:
+  FORCE_INLINE ElementProxy(TArray array, size_t index)
+      : _array(array), _index(index) {}
+
+  FORCE_INLINE this_type& operator=(const this_type& src) {
+    getUpstreamElement().set(src.as<VariantConstRef>());
+    return *this;
+  }
+
+  // Replaces the value
+  //
+  // operator=(const TValue&)
+  // TValue = bool, long, int, short, float, double, serialized, VariantRef,
+  //          std::string, String, ArrayRef, ObjectRef
+  template <typename T>
+  FORCE_INLINE this_type& operator=(const T& src) {
+    getUpstreamElement().set(src);
+    return *this;
+  }
+  //
+  // operator=(TValue)
+  // TValue = char*, const char*, const __FlashStringHelper*
+  template <typename T>
+  FORCE_INLINE this_type& operator=(T* src) {
+    getUpstreamElement().set(src);
+    return *this;
+  }
+
+  FORCE_INLINE void clear() const {
+    getUpstreamElement().clear();
+  }
+
+  FORCE_INLINE bool isNull() const {
+    return getUpstreamElement().isNull();
+  }
+
+  template <typename T>
+  FORCE_INLINE typename VariantAs<T>::type as() const {
+    return getUpstreamElement().template as<T>();
+  }
+
+  template <typename T>
+  FORCE_INLINE bool is() const {
+    return getUpstreamElement().template is<T>();
+  }
+
+  template <typename T>
+  FORCE_INLINE typename VariantTo<T>::type to() const {
+    return getUpstreamElement().template to<T>();
+  }
+
+  // Replaces the value
+  //
+  // bool set(const TValue&)
+  // TValue = bool, long, int, short, float, double, serialized, VariantRef,
+  //          std::string, String, ArrayRef, ObjectRef
+  template <typename TValue>
+  FORCE_INLINE bool set(const TValue& value) const {
+    return getUpstreamElement().set(value);
+  }
+  //
+  // bool set(TValue)
+  // TValue = char*, const char*, const __FlashStringHelper*
+  template <typename TValue>
+  FORCE_INLINE bool set(TValue* value) const {
+    return getUpstreamElement().set(value);
+  }
+
+  template <typename Visitor>
+  void accept(Visitor& visitor) const {
+    return getUpstreamElement().accept(visitor);
+  }
+
+  FORCE_INLINE size_t size() const {
+    return getUpstreamElement().size();
+  }
+
+  template <typename TNestedKey>
+  VariantRef getMember(TNestedKey* key) const {
+    return getUpstreamElement().getMember(key);
+  }
+
+  template <typename TNestedKey>
+  VariantRef getMember(const TNestedKey& key) const {
+    return getUpstreamElement().getMember(key);
+  }
+
+  template <typename TNestedKey>
+  VariantRef getOrAddMember(TNestedKey* key) const {
+    return getUpstreamElement().getOrAddMember(key);
+  }
+
+  template <typename TNestedKey>
+  VariantRef getOrAddMember(const TNestedKey& key) const {
+    return getUpstreamElement().getOrAddMember(key);
+  }
+
+  VariantRef addElement() const {
+    return getUpstreamElement().addElement();
+  }
+
+  VariantRef getElement(size_t index) const {
+    return getUpstreamElement().getElement(index);
+  }
+
+  FORCE_INLINE void remove(size_t index) const {
+    getUpstreamElement().remove(index);
+  }
+  // remove(char*) const
+  // remove(const char*) const
+  // remove(const __FlashStringHelper*) const
+  template <typename TChar>
+  FORCE_INLINE typename enable_if<IsString<TChar*>::value>::type remove(
+      TChar* key) const {
+    getUpstreamElement().remove(key);
+  }
+  // remove(const std::string&) const
+  // remove(const String&) const
+  template <typename TString>
+  FORCE_INLINE typename enable_if<IsString<TString>::value>::type remove(
+      const TString& key) const {
+    getUpstreamElement().remove(key);
+  }
+
+ private:
+  FORCE_INLINE VariantRef getUpstreamElement() const {
+    return _array.getElement(_index);
+  }
+
+  TArray _array;
+  const size_t _index;
+};
+
+template <typename TArray>
+inline ElementProxy<const TArray&> ArrayShortcuts<TArray>::operator[](
+    size_t index) const {
+  return ElementProxy<const TArray&>(*impl(), index);
+}
+
+}  // namespace ARDUINOJSON_NAMESPACE
+
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif

src/ArduinoJson/Array/Utilities.hpp

@@ -0,0 +1,66 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2019
+// MIT License
+
+#pragma once
+
+#include "ArrayRef.hpp"
+
+namespace ARDUINOJSON_NAMESPACE {
+
+// Copy a 1D array to a JsonArray
+template <typename T, size_t N>
+inline bool copyArray(T (&src)[N], ArrayRef dst) {
+  return copyArray(src, N, dst);
+}
+
+// Copy a 1D array to a JsonArray
+template <typename T>
+inline bool copyArray(T* src, size_t len, ArrayRef dst) {
+  bool ok = true;
+  for (size_t i = 0; i < len; i++) {
+    ok &= dst.add(src[i]);
+  }
+  return ok;
+}
+
+// Copy a 2D array to a JsonArray
+template <typename T, size_t N1, size_t N2>
+inline bool copyArray(T (&src)[N1][N2], ArrayRef dst) {
+  bool ok = true;
+  for (size_t i = 0; i < N1; i++) {
+    ArrayRef nestedArray = dst.createNestedArray();
+    for (size_t j = 0; j < N2; j++) {
+      ok &= nestedArray.add(src[i][j]);
+    }
+  }
+  return ok;
+}
+
+// Copy a JsonArray to a 1D array
+template <typename T, size_t N>
+inline size_t copyArray(ArrayConstRef src, T (&dst)[N]) {
+  return copyArray(src, dst, N);
+}
+
+// Copy a JsonArray to a 1D array
+template <typename T>
+inline size_t copyArray(ArrayConstRef src, T* dst, size_t len) {
+  size_t i = 0;
+  for (ArrayConstRef::iterator it = src.begin(); it != src.end() && i < len;
+       ++it)
+    dst[i++] = *it;
+  return i;
+}
+
+// Copy a JsonArray to a 2D array
+template <typename T, size_t N1, size_t N2>
+inline void copyArray(ArrayConstRef src, T (&dst)[N1][N2]) {
+  size_t i = 0;
+  for (ArrayConstRef::iterator it = src.begin(); it != src.end() && i < N1;
+       ++it) {
+    copyArray(it->as<ArrayConstRef>(), dst[i++]);
+  }
+}
+
+}  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/Collection/CollectionData.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once
@@ -24,13 +24,13 @@ class CollectionData {
 
   VariantData *add(MemoryPool *pool);
 
-  template <typename TKey>
-  VariantData *add(TKey key, MemoryPool *pool);
+  template <typename TAdaptedString>
+  VariantData *add(TAdaptedString key, MemoryPool *pool);
 
   void clear();
 
-  template <typename TKey>
-  bool containsKey(const TKey &key) const;
+  template <typename TAdaptedString>
+  bool containsKey(const TAdaptedString &key) const;
 
   bool copyFrom(const CollectionData &src, MemoryPool *pool);
 
@@ -39,8 +39,8 @@ class CollectionData {
 
   VariantData *get(size_t index) const;
 
-  template <typename TKey>
-  VariantData *get(TKey key) const;
+  template <typename TAdaptedString>
+  VariantData *get(TAdaptedString key) const;
 
   VariantSlot *head() const {
     return _head;
@@ -48,20 +48,22 @@ class CollectionData {
 
   void remove(size_t index);
 
-  template <typename TKey>
-  void remove(TKey key) {
+  template <typename TAdaptedString>
+  void remove(TAdaptedString key) {
     remove(getSlot(key));
   }
 
   void remove(VariantSlot *slot);
 
+  size_t memoryUsage() const;
+  size_t nesting() const;
   size_t size() const;
 
  private:
   VariantSlot *getSlot(size_t index) const;
 
-  template <typename TKey>
-  VariantSlot *getSlot(TKey key) const;
+  template <typename TAdaptedString>
+  VariantSlot *getSlot(TAdaptedString key) const;
 
   VariantSlot *getPreviousSlot(VariantSlot *) const;
 };

src/ArduinoJson/Collection/CollectionImpl.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once
@@ -29,8 +29,8 @@ inline VariantData* CollectionData::add(MemoryPool* pool) {
   return addSlot(pool)->data();
 }
 
-template <typename TKey>
-inline VariantData* CollectionData::add(TKey key, MemoryPool* pool) {
+template <typename TAdaptedString>
+inline VariantData* CollectionData::add(TAdaptedString key, MemoryPool* pool) {
   VariantSlot* slot = addSlot(pool);
   if (!slotSetKey(slot, key, pool)) return 0;
   return slot->data();
@@ -41,8 +41,8 @@ inline void CollectionData::clear() {
   _tail = 0;
 }
 
-template <typename TKey>
-inline bool CollectionData::containsKey(const TKey& key) const {
+template <typename TAdaptedString>
+inline bool CollectionData::containsKey(const TAdaptedString& key) const {
   return getSlot(key) != 0;
 }
 
@@ -53,9 +53,9 @@ inline bool CollectionData::copyFrom(const CollectionData& src,
     VariantData* var;
     if (s->key() != 0) {
       if (s->ownsKey())
-        var = add(RamStringWrapper(s->key()), pool);
+        var = add(RamStringAdapter(s->key()), pool);
       else
-        var = add(ConstRamStringWrapper(s->key()), pool);
+        var = add(ConstRamStringAdapter(s->key()), pool);
     } else {
       var = add(pool);
     }
@@ -69,7 +69,7 @@ inline bool CollectionData::equalsObject(const CollectionData& other) const {
   size_t count = 0;
   for (VariantSlot* slot = _head; slot; slot = slot->next()) {
     VariantData* v1 = slot->data();
-    VariantData* v2 = other.get(wrapString(slot->key()));
+    VariantData* v2 = other.get(adaptString(slot->key()));
     if (!variantEquals(v1, v2)) return false;
     count++;
   }
@@ -88,8 +88,8 @@ inline bool CollectionData::equalsArray(const CollectionData& other) const {
   }
 }
 
-template <typename TKey>
-inline VariantSlot* CollectionData::getSlot(TKey key) const {
+template <typename TAdaptedString>
+inline VariantSlot* CollectionData::getSlot(TAdaptedString key) const {
   VariantSlot* slot = _head;
   while (slot) {
     if (key.equals(slot->key())) break;
@@ -112,8 +112,8 @@ inline VariantSlot* CollectionData::getPreviousSlot(VariantSlot* target) const {
   return 0;
 }
 
-template <typename TKey>
-inline VariantData* CollectionData::get(TKey key) const {
+template <typename TAdaptedString>
+inline VariantData* CollectionData::get(TAdaptedString key) const {
   VariantSlot* slot = getSlot(key);
   return slot ? slot->data() : 0;
 }
@@ -138,6 +138,24 @@ inline void CollectionData::remove(size_t index) {
   remove(getSlot(index));
 }
 
+inline size_t CollectionData::memoryUsage() const {
+  size_t total = 0;
+  for (VariantSlot* s = _head; s; s = s->next()) {
+    total += sizeof(VariantSlot) + s->data()->memoryUsage();
+    if (s->ownsKey()) total += strlen(s->key()) + 1;
+  }
+  return total;
+}
+
+inline size_t CollectionData::nesting() const {
+  size_t maxChildNesting = 0;
+  for (VariantSlot* s = _head; s; s = s->next()) {
+    size_t childNesting = s->data()->nesting();
+    if (childNesting > maxChildNesting) maxChildNesting = childNesting;
+  }
+  return maxChildNesting + 1;
+}
+
 inline size_t CollectionData::size() const {
   return slotSize(_head);
 }

src/ArduinoJson/Configuration.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once
@@ -53,11 +53,6 @@
 #define ARDUINOJSON_DEFAULT_NESTING_LIMIT 10
 #endif
 
-// Default capacity for DynamicJsonDocument
-#ifndef ARDUINOJSON_DEFAULT_POOL_SIZE
-#define ARDUINOJSON_DEFAULT_POOL_SIZE 1024
-#endif
-
 #else  // ARDUINOJSON_EMBEDDED_MODE
 
 // On a computer we have plenty of memory so we can use doubles
@@ -89,11 +84,6 @@
 #define ARDUINOJSON_DEFAULT_NESTING_LIMIT 50
 #endif
 
-// Default capacity for DynamicJsonDocument
-#ifndef ARDUINOJSON_DEFAULT_POOL_SIZE
-#define ARDUINOJSON_DEFAULT_POOL_SIZE 16384
-#endif
-
 #endif  // ARDUINOJSON_EMBEDDED_MODE
 
 #ifdef ARDUINO
@@ -130,6 +120,11 @@
 #endif
 #endif
 
+// Convert unicode escape sequence (\u0123) to UTF-8
+#ifndef ARDUINOJSON_DECODE_UNICODE
+#define ARDUINOJSON_DECODE_UNICODE 0
+#endif
+
 // Control the exponentiation threshold for big numbers
 // CAUTION: cannot be more that 1e9 !!!!
 #ifndef ARDUINOJSON_POSITIVE_EXPONENTIATION_THRESHOLD
@@ -150,3 +145,7 @@
 #define ARDUINOJSON_LITTLE_ENDIAN 0
 #endif
 #endif
+
+#ifndef ARDUINOJSON_TAB
+#define ARDUINOJSON_TAB "  "
+#endif

src/ArduinoJson/Deserialization/ArduinoStreamReader.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Deserialization/CharPointerReader.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Deserialization/DeserializationError.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Deserialization/FlashStringReader.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Deserialization/IteratorReader.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Deserialization/NestingLimit.hpp

@@ -0,0 +1,17 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2019
+// MIT License
+
+#pragma once
+
+#include "../Configuration.hpp"
+
+namespace ARDUINOJSON_NAMESPACE {
+
+struct NestingLimit {
+  NestingLimit() : value(ARDUINOJSON_DEFAULT_NESTING_LIMIT) {}
+  explicit NestingLimit(uint8_t n) : value(n) {}
+
+  uint8_t value;
+};
+}  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/Deserialization/StdStreamReader.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Deserialization/deserialize.hpp

@@ -1,16 +1,17 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once
 
 #include "../StringStorage/StringStorage.hpp"
-#include "./ArduinoStreamReader.hpp"
-#include "./CharPointerReader.hpp"
-#include "./DeserializationError.hpp"
-#include "./FlashStringReader.hpp"
-#include "./IteratorReader.hpp"
-#include "./StdStreamReader.hpp"
+#include "ArduinoStreamReader.hpp"
+#include "CharPointerReader.hpp"
+#include "DeserializationError.hpp"
+#include "FlashStringReader.hpp"
+#include "IteratorReader.hpp"
+#include "NestingLimit.hpp"
+#include "StdStreamReader.hpp"
 
 namespace ARDUINOJSON_NAMESPACE {
 
@@ -22,50 +23,54 @@ TDeserializer<TReader, TWriter> makeDeserializer(MemoryPool &pool,
   return TDeserializer<TReader, TWriter>(pool, reader, writer, nestingLimit);
 }
 
-// DeserializationError deserialize(JsonDocument& doc, TString input);
-// TString = const std::string&, const String&
+// deserialize(JsonDocument&, const std::string&);
+// deserialize(JsonDocument&, const String&);
 template <template <typename, typename> class TDeserializer, typename TString>
 typename enable_if<!is_array<TString>::value, DeserializationError>::type
-deserialize(JsonDocument &doc, const TString &input) {
+deserialize(JsonDocument &doc, const TString &input,
+            NestingLimit nestingLimit) {
   doc.clear();
   return makeDeserializer<TDeserializer>(
              doc.memoryPool(), makeReader(input),
-             makeStringStorage(doc.memoryPool(), input), doc.nestingLimit)
+             makeStringStorage(doc.memoryPool(), input), nestingLimit.value)
       .parse(doc.data());
 }
 //
-// DeserializationError deserialize(JsonDocument& doc, TChar* input);
-// TChar* = char*, const char*, const __FlashStringHelper*
-template <template <typename, typename> class TDeserializer, typename TChar>
-DeserializationError deserialize(JsonDocument &doc, TChar *input) {
-  doc.clear();
-  return makeDeserializer<TDeserializer>(
-             doc.memoryPool(), makeReader(input),
-             makeStringStorage(doc.memoryPool(), input), doc.nestingLimit)
-      .parse(doc.data());
-}
-//
-// DeserializationError deserialize(JsonDocument& doc, TChar* input, size_t
-// inputSize);
-// TChar* = char*, const char*, const __FlashStringHelper*
+// deserialize(JsonDocument&, char*);
+// deserialize(JsonDocument&, const char*);
+// deserialize(JsonDocument&, const __FlashStringHelper*);
 template <template <typename, typename> class TDeserializer, typename TChar>
 DeserializationError deserialize(JsonDocument &doc, TChar *input,
-                                 size_t inputSize) {
+                                 NestingLimit nestingLimit) {
+  doc.clear();
+  return makeDeserializer<TDeserializer>(
+             doc.memoryPool(), makeReader(input),
+             makeStringStorage(doc.memoryPool(), input), nestingLimit.value)
+      .parse(doc.data());
+}
+//
+// deserialize(JsonDocument&, char*, size_t);
+// deserialize(JsonDocument&, const char*, size_t);
+// deserialize(JsonDocument&, const __FlashStringHelper*, size_t);
+template <template <typename, typename> class TDeserializer, typename TChar>
+DeserializationError deserialize(JsonDocument &doc, TChar *input,
+                                 size_t inputSize, NestingLimit nestingLimit) {
   doc.clear();
   return makeDeserializer<TDeserializer>(
              doc.memoryPool(), makeReader(input, inputSize),
-             makeStringStorage(doc.memoryPool(), input), doc.nestingLimit)
+             makeStringStorage(doc.memoryPool(), input), nestingLimit.value)
       .parse(doc.data());
 }
 //
-// DeserializationError deserialize(JsonDocument& doc, TStream input);
-// TStream = std::istream&, Stream&
+// deserialize(JsonDocument&, std::istream&);
+// deserialize(JsonDocument&, Stream&);
 template <template <typename, typename> class TDeserializer, typename TStream>
-DeserializationError deserialize(JsonDocument &doc, TStream &input) {
+DeserializationError deserialize(JsonDocument &doc, TStream &input,
+                                 NestingLimit nestingLimit) {
   doc.clear();
   return makeDeserializer<TDeserializer>(
              doc.memoryPool(), makeReader(input),
-             makeStringStorage(doc.memoryPool(), input), doc.nestingLimit)
+             makeStringStorage(doc.memoryPool(), input), nestingLimit.value)
       .parse(doc.data());
 }
 }  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/Document/DynamicJsonDocument.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once
@@ -12,17 +12,24 @@ namespace ARDUINOJSON_NAMESPACE {
 
 class DynamicJsonDocument : public JsonDocument {
  public:
-  DynamicJsonDocument(size_t capa = ARDUINOJSON_DEFAULT_POOL_SIZE)
-      : JsonDocument(allocPool(addPadding(capa))) {}
+  explicit DynamicJsonDocument(size_t capa) : JsonDocument(allocPool(capa)) {}
 
   DynamicJsonDocument(const DynamicJsonDocument& src)
-      : JsonDocument(allocPool(src.capacity())) {
-    copy(src);
+      : JsonDocument(allocPool(src.memoryUsage())) {
+    set(src);
   }
 
-  DynamicJsonDocument(const JsonDocument& src)
-      : JsonDocument(allocPool(src.capacity())) {
-    copy(src);
+  template <typename T>
+  DynamicJsonDocument(const T& src,
+                      typename enable_if<IsVisitable<T>::value>::type* = 0)
+      : JsonDocument(allocPool(src.memoryUsage())) {
+    set(src);
+  }
+
+  // disambiguate
+  DynamicJsonDocument(VariantRef src)
+      : JsonDocument(allocPool(src.memoryUsage())) {
+    set(src);
   }
 
   ~DynamicJsonDocument() {
@@ -31,19 +38,20 @@ class DynamicJsonDocument : public JsonDocument {
 
   DynamicJsonDocument& operator=(const DynamicJsonDocument& src) {
     reallocPoolIfTooSmall(src.memoryUsage());
-    copy(src);
+    set(src);
     return *this;
   }
 
   template <typename T>
-  DynamicJsonDocument& operator=(const JsonDocument& src) {
+  DynamicJsonDocument& operator=(const T& src) {
     reallocPoolIfTooSmall(src.memoryUsage());
-    copy(src);
+    set(src);
     return *this;
   }
 
  private:
-  MemoryPool allocPool(size_t capa) {
+  MemoryPool allocPool(size_t requiredSize) {
+    size_t capa = addPadding(requiredSize);
     return MemoryPool(reinterpret_cast<char*>(malloc(capa)), capa);
   }
 

src/ArduinoJson/Document/JsonDocument.hpp

@@ -1,19 +1,21 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once
 
 #include "../Memory/MemoryPool.hpp"
+#include "../Object/ObjectRef.hpp"
 #include "../Variant/VariantRef.hpp"
 #include "../Variant/VariantTo.hpp"
 
+#include "../Array/ElementProxy.hpp"
+#include "../Object/MemberProxy.hpp"
+
 namespace ARDUINOJSON_NAMESPACE {
 
 class JsonDocument : public Visitable {
  public:
-  uint8_t nestingLimit;
-
   template <typename Visitor>
   void accept(Visitor& visitor) const {
     return getVariant().accept(visitor);
@@ -39,14 +41,36 @@ class JsonDocument : public Visitable {
     return getVariant().template is<T>();
   }
 
+  bool isNull() const {
+    return getVariant().isNull();
+  }
+
   size_t memoryUsage() const {
     return _pool.size();
   }
 
+  size_t nesting() const {
+    return _data.nesting();
+  }
+
   size_t capacity() const {
     return _pool.capacity();
   }
 
+  size_t size() const {
+    return _data.size();
+  }
+
+  bool set(const JsonDocument& src) {
+    return to<VariantRef>().set(src.as<VariantRef>());
+  }
+
+  template <typename T>
+  typename enable_if<!is_base_of<JsonDocument, T>::value, bool>::type set(
+      const T& src) {
+    return to<VariantRef>().set(src);
+  }
+
   template <typename T>
   typename VariantTo<T>::type to() {
     clear();
@@ -62,16 +86,169 @@ class JsonDocument : public Visitable {
     return _data;
   }
 
+  ArrayRef createNestedArray() {
+    return addElement().to<ArrayRef>();
+  }
+
+  // createNestedArray(char*)
+  // createNestedArray(const char*)
+  // createNestedArray(const __FlashStringHelper*)
+  template <typename TChar>
+  ArrayRef createNestedArray(TChar* key) {
+    return getOrAddMember(key).template to<ArrayRef>();
+  }
+
+  // createNestedArray(const std::string&)
+  // createNestedArray(const String&)
+  template <typename TString>
+  ArrayRef createNestedArray(const TString& key) {
+    return getOrAddMember(key).template to<ArrayRef>();
+  }
+
+  ObjectRef createNestedObject() {
+    return addElement().to<ObjectRef>();
+  }
+
+  // createNestedObject(char*)
+  // createNestedObject(const char*)
+  // createNestedObject(const __FlashStringHelper*)
+  template <typename TChar>
+  ObjectRef createNestedObject(TChar* key) {
+    return getOrAddMember(key).template to<ObjectRef>();
+  }
+
+  // createNestedObject(const std::string&)
+  // createNestedObject(const String&)
+  template <typename TString>
+  ObjectRef createNestedObject(const TString& key) {
+    return getOrAddMember(key).template to<ObjectRef>();
+  }
+
+  // operator[](const std::string&)
+  // operator[](const String&)
+  template <typename TString>
+  FORCE_INLINE
+      typename enable_if<IsString<TString>::value,
+                         MemberProxy<JsonDocument&, const TString&> >::type
+      operator[](const TString& key) {
+    return MemberProxy<JsonDocument&, const TString&>(*this, key);
+  }
+
+  // operator[](char*)
+  // operator[](const char*)
+  // operator[](const __FlashStringHelper*)
+  template <typename TChar>
+  FORCE_INLINE typename enable_if<IsString<TChar*>::value,
+                                  MemberProxy<JsonDocument&, TChar*> >::type
+  operator[](TChar* key) {
+    return MemberProxy<JsonDocument&, TChar*>(*this, key);
+  }
+
+  // operator[](const std::string&) const
+  // operator[](const String&) const
+  template <typename TString>
+  FORCE_INLINE
+      typename enable_if<IsString<TString>::value, VariantConstRef>::type
+      operator[](const TString& key) const {
+    return getVariant()[key];
+  }
+
+  // operator[](char*) const
+  // operator[](const char*) const
+  // operator[](const __FlashStringHelper*) const
+  template <typename TChar>
+  FORCE_INLINE
+      typename enable_if<IsString<TChar*>::value, VariantConstRef>::type
+      operator[](TChar* key) const {
+    return getVariant()[key];
+  }
+
+  FORCE_INLINE ElementProxy<JsonDocument&> operator[](size_t index) {
+    return ElementProxy<JsonDocument&>(*this, index);
+  }
+
+  FORCE_INLINE VariantConstRef operator[](size_t index) const {
+    return VariantConstRef(_data.getElement(index));
+  }
+
+  FORCE_INLINE VariantRef getElement(size_t index) {
+    return VariantRef(&_pool, _data.getElement(index));
+  }
+
+  // getMember(char*) const
+  // getMember(const char*) const
+  // getMember(const __FlashStringHelper*) const
+  template <typename TChar>
+  FORCE_INLINE VariantRef getMember(TChar* key) {
+    return VariantRef(&_pool, _data.getMember(adaptString(key)));
+  }
+
+  // getMember(const std::string&) const
+  // getMember(const String&) const
+  template <typename TString>
+  FORCE_INLINE typename enable_if<IsString<TString>::value, VariantRef>::type
+  getMember(const TString& key) {
+    return VariantRef(&_pool, _data.getMember(adaptString(key)));
+  }
+
+  // getOrAddMember(char*)
+  // getOrAddMember(const char*)
+  // getOrAddMember(const __FlashStringHelper*)
+  template <typename TChar>
+  FORCE_INLINE VariantRef getOrAddMember(TChar* key) {
+    return VariantRef(&_pool, _data.getOrAddMember(adaptString(key), &_pool));
+  }
+
+  // getOrAddMember(const std::string&)
+  // getOrAddMember(const String&)
+  template <typename TString>
+  FORCE_INLINE VariantRef getOrAddMember(const TString& key) {
+    return VariantRef(&_pool, _data.getOrAddMember(adaptString(key), &_pool));
+  }
+
+  FORCE_INLINE VariantRef addElement() {
+    return VariantRef(&_pool, _data.addElement(&_pool));
+  }
+
+  template <typename TValue>
+  FORCE_INLINE bool add(const TValue& value) {
+    return addElement().set(value);
+  }
+
+  // add(char*) const
+  // add(const char*) const
+  // add(const __FlashStringHelper*) const
+  template <typename TChar>
+  FORCE_INLINE bool add(TChar* value) {
+    return addElement().set(value);
+  }
+
+  FORCE_INLINE void remove(size_t index) {
+    _data.remove(index);
+  }
+  // remove(char*)
+  // remove(const char*)
+  // remove(const __FlashStringHelper*)
+  template <typename TChar>
+  FORCE_INLINE typename enable_if<IsString<TChar*>::value>::type remove(
+      TChar* key) {
+    _data.remove(adaptString(key));
+  }
+  // remove(const std::string&)
+  // remove(const String&)
+  template <typename TString>
+  FORCE_INLINE typename enable_if<IsString<TString>::value>::type remove(
+      const TString& key) {
+    _data.remove(adaptString(key));
+  }
+
  protected:
-  JsonDocument(MemoryPool pool)
-      : nestingLimit(ARDUINOJSON_DEFAULT_NESTING_LIMIT), _pool(pool) {}
+  JsonDocument(MemoryPool pool) : _pool(pool) {
+    _data.setNull();
+  }
 
-  JsonDocument(char* buf, size_t capa)
-      : nestingLimit(ARDUINOJSON_DEFAULT_NESTING_LIMIT), _pool(buf, capa) {}
-
-  void copy(const JsonDocument& src) {
-    nestingLimit = src.nestingLimit;
-    to<VariantRef>().set(src.as<VariantRef>());
+  JsonDocument(char* buf, size_t capa) : _pool(buf, capa) {
+    _data.setNull();
   }
 
   void replacePool(MemoryPool pool) {

src/ArduinoJson/Document/StaticJsonDocument.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once
@@ -16,13 +16,31 @@ class StaticJsonDocument : public JsonDocument {
  public:
   StaticJsonDocument() : JsonDocument(_buffer, ACTUAL_CAPACITY) {}
 
-  StaticJsonDocument(const JsonDocument& src)
+  StaticJsonDocument(const StaticJsonDocument& src)
       : JsonDocument(_buffer, ACTUAL_CAPACITY) {
-    copy(src);
+    set(src);
   }
 
-  StaticJsonDocument operator=(const JsonDocument& src) {
-    copy(src);
+  template <typename T>
+  StaticJsonDocument(const T& src,
+                     typename enable_if<IsVisitable<T>::value>::type* = 0)
+      : JsonDocument(_buffer, ACTUAL_CAPACITY) {
+    set(src);
+  }
+
+  // disambiguate
+  StaticJsonDocument(VariantRef src) : JsonDocument(_buffer, ACTUAL_CAPACITY) {
+    set(src);
+  }
+
+  StaticJsonDocument operator=(const StaticJsonDocument& src) {
+    set(src);
+    return *this;
+  }
+
+  template <typename T>
+  StaticJsonDocument operator=(const T& src) {
+    set(src);
     return *this;
   }
 

src/ArduinoJson/Json/EscapeSequence.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Json/IndentedPrint.hpp

@@ -1,69 +0,0 @@
-// ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
-// MIT License
-
-#pragma once
-
-namespace ARDUINOJSON_NAMESPACE {
-
-// Decorator on top of Print to allow indented output.
-// This class is used by serializeJsonPretty() but can also be used
-// for your own purpose, like logging.
-template <typename Print>
-class IndentedPrint {
- public:
-  explicit IndentedPrint(Print &p) : sink(&p) {
-    level = 0;
-    tabSize = 2;
-    isNewLine = true;
-  }
-
-  size_t write(uint8_t c) {
-    size_t n = 0;
-    if (isNewLine) n += writeTabs();
-    n += sink->write(c);
-    isNewLine = c == '\n';
-    return n;
-  }
-
-  size_t write(const uint8_t *s, size_t n) {
-    // TODO: optimize
-    size_t bytesWritten = 0;
-    while (n > 0) {
-      bytesWritten += write(*s++);
-      n--;
-    }
-    return bytesWritten;
-  }
-
-  // Adds one level of indentation
-  void indent() {
-    if (level < MAX_LEVEL) level++;
-  }
-
-  // Removes one level of indentation
-  void unindent() {
-    if (level > 0) level--;
-  }
-
-  // Set the number of space printed for each level of indentation
-  void setTabSize(uint8_t n) {
-    if (n < MAX_TAB_SIZE) tabSize = n & MAX_TAB_SIZE;
-  }
-
- private:
-  Print *sink;
-  uint8_t level : 4;
-  uint8_t tabSize : 3;
-  bool isNewLine : 1;
-
-  size_t writeTabs() {
-    size_t n = 0;
-    for (int i = 0; i < level * tabSize; i++) n += sink->write(' ');
-    return n;
-  }
-
-  static const int MAX_LEVEL = 15;    // because it's only 4 bits
-  static const int MAX_TAB_SIZE = 7;  // because it's only 3 bits
-};
-}  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/Json/JsonDeserializer.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once
@@ -11,6 +11,7 @@
 #include "../Polyfills/type_traits.hpp"
 #include "../Variant/VariantData.hpp"
 #include "EscapeSequence.hpp"
+#include "Utf8.hpp"
 
 namespace ARDUINOJSON_NAMESPACE {
 
@@ -18,7 +19,6 @@ template <typename TReader, typename TStringStorage>
 class JsonDeserializer {
   typedef typename remove_reference<TStringStorage>::type::StringBuilder
       StringBuilder;
-  typedef const char *StringType;
 
  public:
   JsonDeserializer(MemoryPool &pool, TReader reader,
@@ -123,10 +123,10 @@ class JsonDeserializer {
       if (!slot) return DeserializationError::NoMemory;
 
       // Parse key
-      StringType key;
+      const char *key;
       err = parseKey(key);
       if (err) return err;
-      slot->setOwnedKey(key);
+      slot->setOwnedKey(make_not_null(key));
 
       // Skip spaces
       err = skipSpacesAndComments();
@@ -161,7 +161,7 @@ class JsonDeserializer {
     }
   }
 
-  DeserializationError parseKey(StringType &key) {
+  DeserializationError parseKey(const char *&key) {
     if (isQuote(current())) {
       return parseQuotedString(key);
     } else {
@@ -170,14 +170,14 @@ class JsonDeserializer {
   }
 
   DeserializationError parseStringValue(VariantData &variant) {
-    StringType value;
+    const char *value;
     DeserializationError err = parseQuotedString(value);
     if (err) return err;
-    variant.setOwnedString(value);
+    variant.setOwnedString(make_not_null(value));
     return DeserializationError::Ok;
   }
 
-  DeserializationError parseQuotedString(StringType &result) {
+  DeserializationError parseQuotedString(const char *&result) {
     StringBuilder builder = _stringStorage.startString();
     const char stopChar = current();
 
@@ -192,7 +192,18 @@ class JsonDeserializer {
       if (c == '\\') {
         c = current();
         if (c == '\0') return DeserializationError::IncompleteInput;
-        if (c == 'u') return DeserializationError::NotSupported;
+        if (c == 'u') {
+#if ARDUINOJSON_DECODE_UNICODE
+          uint16_t codepoint;
+          move();
+          DeserializationError err = parseCodepoint(codepoint);
+          if (err) return err;
+          Utf8::encodeCodepoint(codepoint, builder);
+          continue;
+#else
+          return DeserializationError::NotSupported;
+#endif
+        }
         // replace char
         c = EscapeSequence::unescapeChar(c);
         if (c == '\0') return DeserializationError::InvalidInput;
@@ -207,7 +218,7 @@ class JsonDeserializer {
     return DeserializationError::Ok;
   }
 
-  DeserializationError parseNonQuotedString(StringType &result) {
+  DeserializationError parseNonQuotedString(const char *&result) {
     StringBuilder builder = _stringStorage.startString();
 
     char c = current();
@@ -242,17 +253,41 @@ class JsonDeserializer {
 
     if (isInteger(buffer)) {
       result.setInteger(parseInteger<Integer>(buffer));
-    } else if (isFloat(buffer)) {
+      return DeserializationError::Ok;
+    }
+    if (isFloat(buffer)) {
       result.setFloat(parseFloat<Float>(buffer));
-    } else if (!strcmp(buffer, "true")) {
+      return DeserializationError::Ok;
+    }
+    c = buffer[0];
+    if (c == 't') {  // true
       result.setBoolean(true);
-    } else if (!strcmp(buffer, "false")) {
+      return n == 4 ? DeserializationError::Ok
+                    : DeserializationError::IncompleteInput;
+    }
+    if (c == 'f') {  // false
       result.setBoolean(false);
-    } else if (!strcmp(buffer, "null")) {
-      // already null
-    } else {
+      return n == 5 ? DeserializationError::Ok
+                    : DeserializationError::IncompleteInput;
+    }
+    if (c == 'n') {  // null
+      // the variant is already null
+      return n == 4 ? DeserializationError::Ok
+                    : DeserializationError::IncompleteInput;
+    }
     return DeserializationError::InvalidInput;
   }
+
+  DeserializationError parseCodepoint(uint16_t &codepoint) {
+    codepoint = 0;
+    for (uint8_t i = 0; i < 4; ++i) {
+      char digit = current();
+      if (!digit) return DeserializationError::IncompleteInput;
+      uint8_t value = decodeHex(digit);
+      if (value > 0x0F) return DeserializationError::InvalidInput;
+      codepoint = uint16_t((codepoint << 4) | value);
+      move();
+    }
     return DeserializationError::Ok;
   }
 
@@ -269,6 +304,12 @@ class JsonDeserializer {
     return c == '\'' || c == '\"';
   }
 
+  static inline uint8_t decodeHex(char c) {
+    if (c < 'A') return uint8_t(c - '0');
+    c &= ~0x20;  // uppercase
+    return uint8_t(c - 'A' + 10);
+  }
+
   DeserializationError skipSpacesAndComments() {
     for (;;) {
       switch (current()) {
@@ -336,24 +377,31 @@ class JsonDeserializer {
   bool _loaded;
 };
 
-template <typename TDocument, typename TInput>
-DeserializationError deserializeJson(TDocument &doc, const TInput &input) {
-  return deserialize<JsonDeserializer>(doc, input);
+template <typename TInput>
+DeserializationError deserializeJson(
+    JsonDocument &doc, const TInput &input,
+    NestingLimit nestingLimit = NestingLimit()) {
+  return deserialize<JsonDeserializer>(doc, input, nestingLimit);
 }
 
-template <typename TDocument, typename TInput>
-DeserializationError deserializeJson(TDocument &doc, TInput *input) {
-  return deserialize<JsonDeserializer>(doc, input);
+template <typename TInput>
+DeserializationError deserializeJson(
+    JsonDocument &doc, TInput *input,
+    NestingLimit nestingLimit = NestingLimit()) {
+  return deserialize<JsonDeserializer>(doc, input, nestingLimit);
 }
 
-template <typename TDocument, typename TInput>
-DeserializationError deserializeJson(TDocument &doc, TInput *input,
-                                     size_t inputSize) {
-  return deserialize<JsonDeserializer>(doc, input, inputSize);
+template <typename TInput>
+DeserializationError deserializeJson(
+    JsonDocument &doc, TInput *input, size_t inputSize,
+    NestingLimit nestingLimit = NestingLimit()) {
+  return deserialize<JsonDeserializer>(doc, input, inputSize, nestingLimit);
 }
 
-template <typename TDocument, typename TInput>
-DeserializationError deserializeJson(TDocument &doc, TInput &input) {
-  return deserialize<JsonDeserializer>(doc, input);
+template <typename TInput>
+DeserializationError deserializeJson(
+    JsonDocument &doc, TInput &input,
+    NestingLimit nestingLimit = NestingLimit()) {
+  return deserialize<JsonDeserializer>(doc, input, nestingLimit);
 }
 }  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/Json/JsonSerializer.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once
@@ -7,21 +7,17 @@
 #include "../Misc/Visitable.hpp"
 #include "../Serialization/measure.hpp"
 #include "../Serialization/serialize.hpp"
-#include "JsonWriter.hpp"
+#include "TextFormatter.hpp"
 
 namespace ARDUINOJSON_NAMESPACE {
 
 template <typename TWriter>
 class JsonSerializer {
  public:
-  JsonSerializer(TWriter &writer) : _writer(writer) {}
+  JsonSerializer(TWriter &writer) : _formatter(writer) {}
 
-  void visitFloat(Float value) {
-    _writer.writeFloat(value);
-  }
-
-  void visitArray(const CollectionData &array) {
-    _writer.beginArray();
+  FORCE_INLINE void visitArray(const CollectionData &array) {
+    write('[');
 
     VariantSlot *slot = array.head();
 
@@ -31,63 +27,74 @@ class JsonSerializer {
       slot = slot->next();
       if (slot == 0) break;
 
-      _writer.writeComma();
+      write(',');
     }
 
-    _writer.endArray();
+    write(']');
   }
 
   void visitObject(const CollectionData &object) {
-    _writer.beginObject();
+    write('{');
 
     VariantSlot *slot = object.head();
 
     while (slot != 0) {
-      _writer.writeString(slot->key());
-      _writer.writeColon();
+      _formatter.writeString(slot->key());
+      write(':');
       slot->data()->accept(*this);
 
       slot = slot->next();
       if (slot == 0) break;
 
-      _writer.writeComma();
+      write(',');
     }
 
-    _writer.endObject();
+    write('}');
+  }
+
+  void visitFloat(Float value) {
+    _formatter.writeFloat(value);
   }
 
   void visitString(const char *value) {
-    _writer.writeString(value);
+    _formatter.writeString(value);
   }
 
   void visitRawJson(const char *data, size_t n) {
-    // TODO
-    for (size_t i = 0; i < n; i++) _writer.writeRaw(data[i]);
+    _formatter.writeRaw(data, n);
   }
 
   void visitNegativeInteger(UInt value) {
-    _writer.writeRaw('-');
-    _writer.writeInteger(value);
+    _formatter.writeNegativeInteger(value);
   }
 
   void visitPositiveInteger(UInt value) {
-    _writer.writeInteger(value);
+    _formatter.writePositiveInteger(value);
   }
 
   void visitBoolean(bool value) {
-    _writer.writeBoolean(value);
+    _formatter.writeBoolean(value);
   }
 
   void visitNull() {
-    _writer.writeRaw("null");
+    _formatter.writeRaw("null");
   }
 
   size_t bytesWritten() const {
-    return _writer.bytesWritten();
+    return _formatter.bytesWritten();
+  }
+
+ protected:
+  void write(char c) {
+    _formatter.writeRaw(c);
+  }
+
+  void write(const char *s) {
+    _formatter.writeRaw(s);
   }
 
  private:
-  JsonWriter<TWriter> _writer;
+  TextFormatter<TWriter> _formatter;
 };
 
 template <typename TSource, typename TDestination>

src/ArduinoJson/Json/PrettyJsonSerializer.hpp

@@ -1,40 +1,71 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once
 
+#include "../Configuration.hpp"
 #include "../Serialization/measure.hpp"
 #include "../Serialization/serialize.hpp"
-#include "./IndentedPrint.hpp"
-#include "./JsonSerializer.hpp"
-#include "./Prettyfier.hpp"
+#include "JsonSerializer.hpp"
 
 namespace ARDUINOJSON_NAMESPACE {
 
-template <typename TPrint>
-class PrettyJsonSerializer_Base {
- public:
-  PrettyJsonSerializer_Base(TPrint &output)
-      : _indentedPrint(output), _prettyfier(_indentedPrint) {}
+template <typename TWriter>
+class PrettyJsonSerializer : public JsonSerializer<TWriter> {
+  typedef JsonSerializer<TWriter> base;
 
- protected:
-  IndentedPrint<TPrint> _indentedPrint;
-  Prettyfier<TPrint> _prettyfier;
-};
-
-template <typename TPrint>
-class PrettyJsonSerializer : PrettyJsonSerializer_Base<TPrint>,
-                             public JsonSerializer<Prettyfier<TPrint> > {
  public:
-  PrettyJsonSerializer(TPrint &output)
-      : PrettyJsonSerializer_Base<TPrint>(output),
-        JsonSerializer<Prettyfier<TPrint> >(
-            PrettyJsonSerializer_Base<TPrint>::_prettyfier) {}
+  PrettyJsonSerializer(TWriter &writer) : base(writer), _nesting(0) {}
+
+  void visitArray(const CollectionData &array) {
+    VariantSlot *slot = array.head();
+    if (!slot) return base::write("[]");
+
+    base::write("[\r\n");
+    _nesting++;
+    while (slot != 0) {
+      indent();
+      slot->data()->accept(*this);
+
+      slot = slot->next();
+      base::write(slot ? ",\r\n" : "\r\n");
+    }
+    _nesting--;
+    indent();
+    base::write("]");
+  }
+
+  void visitObject(const CollectionData &object) {
+    VariantSlot *slot = object.head();
+    if (!slot) return base::write("{}");
+
+    base::write("{\r\n");
+    _nesting++;
+    while (slot != 0) {
+      indent();
+      base::visitString(slot->key());
+      base::write(": ");
+      slot->data()->accept(*this);
+
+      slot = slot->next();
+      base::write(slot ? ",\r\n" : "\r\n");
+    }
+    _nesting--;
+    indent();
+    base::write("}");
+  }
+
+ private:
+  void indent() {
+    for (uint8_t i = 0; i < _nesting; i++) base::write(ARDUINOJSON_TAB);
+  }
+
+  uint8_t _nesting;
 };
 
 template <typename TSource, typename TDestination>
-size_t serializeJsonPretty(TSource &source, TDestination &destination) {
+size_t serializeJsonPretty(const TSource &source, TDestination &destination) {
   return serialize<PrettyJsonSerializer>(source, destination);
 }
 

src/ArduinoJson/Json/Prettyfier.hpp

@@ -1,143 +0,0 @@
-// ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
-// MIT License
-
-#pragma once
-
-#include "IndentedPrint.hpp"
-
-namespace ARDUINOJSON_NAMESPACE {
-
-// Converts a compact JSON string into an indented one.
-template <typename TWriter>
-class Prettyfier {
- public:
-  explicit Prettyfier(IndentedPrint<TWriter>& p) : _sink(p) {
-    _previousChar = 0;
-    _inString = false;
-  }
-
-  size_t write(uint8_t c) {
-    size_t n = _inString ? handleStringChar(c) : handleMarkupChar(char(c));
-    _previousChar = char(c);
-    return n;
-  }
-
-  size_t write(const uint8_t* s, size_t n) {
-    // TODO: optimize
-    size_t bytesWritten = 0;
-    while (n > 0) {
-      bytesWritten += write(*s++);
-      n--;
-    }
-    return bytesWritten;
-  }
-
- private:
-  Prettyfier& operator=(const Prettyfier&);  // cannot be assigned
-
-  bool inEmptyBlock() {
-    return _previousChar == '{' || _previousChar == '[';
-  }
-
-  size_t handleStringChar(uint8_t c) {
-    bool isQuote = c == '"' && _previousChar != '\\';
-
-    if (isQuote) _inString = false;
-
-    return _sink.write(c);
-  }
-
-  size_t handleMarkupChar(char c) {
-    switch (c) {
-      case '{':
-      case '[':
-        return writeBlockOpen(c);
-
-      case '}':
-      case ']':
-        return writeBlockClose(c);
-
-      case ':':
-        return writeColon();
-
-      case ',':
-        return writeComma();
-
-      case '"':
-        return writeQuoteOpen();
-
-      default:
-        return writeNormalChar(c);
-    }
-  }
-
-  size_t writeBlockClose(char c) {
-    size_t n = 0;
-    n += unindentIfNeeded();
-    n += write(c);
-    return n;
-  }
-
-  size_t writeBlockOpen(char c) {
-    size_t n = 0;
-    n += indentIfNeeded();
-    n += write(c);
-    return n;
-  }
-
-  size_t writeColon() {
-    size_t n = 0;
-    n += write(": ");
-    return n;
-  }
-
-  size_t writeComma() {
-    size_t n = 0;
-    n += write(",\r\n");
-    return n;
-  }
-
-  size_t writeQuoteOpen() {
-    _inString = true;
-    size_t n = 0;
-    n += indentIfNeeded();
-    n += write('"');
-    return n;
-  }
-
-  size_t writeNormalChar(char c) {
-    size_t n = 0;
-    n += indentIfNeeded();
-    n += write(c);
-    return n;
-  }
-
-  size_t indentIfNeeded() {
-    if (!inEmptyBlock()) return 0;
-
-    _sink.indent();
-    return write("\r\n");
-  }
-
-  size_t unindentIfNeeded() {
-    if (inEmptyBlock()) return 0;
-
-    _sink.unindent();
-    return write("\r\n");
-  }
-
-  size_t write(char c) {
-    return _sink.write(static_cast<uint8_t>(c));
-  }
-
-  template <size_t N>
-  size_t write(const char (&s)[N]) {
-    return _sink.write(reinterpret_cast<const uint8_t*>(s), N - 1);
-  }
-
-  char _previousChar;
-  IndentedPrint<TWriter>& _sink;
-  bool _inString;
-};
-}  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/Json/TextFormatter.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once
@@ -14,36 +14,15 @@
 namespace ARDUINOJSON_NAMESPACE {
 
 template <typename TWriter>
-class JsonWriter {
+class TextFormatter {
  public:
-  explicit JsonWriter(TWriter &writer) : _writer(writer), _length(0) {}
+  explicit TextFormatter(TWriter &writer) : _writer(writer), _length(0) {}
 
   // Returns the number of bytes sent to the TWriter implementation.
   size_t bytesWritten() const {
     return _length;
   }
 
-  void beginArray() {
-    writeRaw('[');
-  }
-  void endArray() {
-    writeRaw(']');
-  }
-
-  void beginObject() {
-    writeRaw('{');
-  }
-  void endObject() {
-    writeRaw('}');
-  }
-
-  void writeColon() {
-    writeRaw(':');
-  }
-  void writeComma() {
-    writeRaw(',');
-  }
-
   void writeBoolean(bool value) {
     if (value)
       writeRaw("true");
@@ -84,22 +63,27 @@ class JsonWriter {
 
     FloatParts<T> parts(value);
 
-    writeInteger(parts.integral);
+    writePositiveInteger(parts.integral);
     if (parts.decimalPlaces) writeDecimals(parts.decimal, parts.decimalPlaces);
 
     if (parts.exponent < 0) {
       writeRaw("e-");
-      writeInteger(-parts.exponent);
+      writePositiveInteger(-parts.exponent);
     }
 
     if (parts.exponent > 0) {
       writeRaw('e');
-      writeInteger(parts.exponent);
+      writePositiveInteger(parts.exponent);
     }
   }
 
+  void writeNegativeInteger(UInt value) {
+    writeRaw('-');
+    writePositiveInteger(value);
+  }
+
   template <typename T>
-  void writeInteger(T value) {
+  void writePositiveInteger(T value) {
     char buffer[22];
     char *end = buffer + sizeof(buffer);
     char *begin = end;
@@ -134,10 +118,16 @@ class JsonWriter {
   void writeRaw(const char *s) {
     _length += _writer.write(reinterpret_cast<const uint8_t *>(s), strlen(s));
   }
+
+  void writeRaw(const char *s, size_t n) {
+    _length += _writer.write(reinterpret_cast<const uint8_t *>(s), n);
+  }
+
   void writeRaw(const char *begin, const char *end) {
     _length += _writer.write(reinterpret_cast<const uint8_t *>(begin),
                              static_cast<size_t>(end - begin));
   }
+
   template <size_t N>
   void writeRaw(const char (&s)[N]) {
     _length += _writer.write(reinterpret_cast<const uint8_t *>(s), N - 1);
@@ -151,6 +141,6 @@ class JsonWriter {
   size_t _length;
 
  private:
-  JsonWriter &operator=(const JsonWriter &);  // cannot be assigned
+  TextFormatter &operator=(const TextFormatter &);  // cannot be assigned
 };
 }  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/Json/Utf8.hpp

@@ -0,0 +1,26 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2019
+// MIT License
+
+#pragma once
+
+namespace ARDUINOJSON_NAMESPACE {
+
+namespace Utf8 {
+template <typename TStringBuilder>
+inline void encodeCodepoint(uint16_t codepoint, TStringBuilder &str) {
+  if (codepoint < 0x80) {
+    str.append(char(codepoint));
+    return;
+  }
+
+  if (codepoint >= 0x00000800) {
+    str.append(char(0xe0 /*0b11100000*/ | (codepoint >> 12)));
+    str.append(char(((codepoint >> 6) & 0x3f /*0b00111111*/) | 0x80));
+  } else {
+    str.append(char(0xc0 /*0b11000000*/ | (codepoint >> 6)));
+  }
+  str.append(char((codepoint & 0x3f /*0b00111111*/) | 0x80));
+}
+}  // namespace Utf8
+}  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/Memory/Alignment.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Memory/MemoryPool.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Memory/StringBuilder.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Memory/StringSlot.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Misc/SerializedValue.hpp

@@ -1,10 +1,10 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once
 
-#include "../Strings/StringWrappers.hpp"
+#include "../Strings/StringAdapters.hpp"
 
 namespace ARDUINOJSON_NAMESPACE {
 
@@ -58,7 +58,7 @@ inline SerializedValue<T> serialized(T str) {
 
 template <typename TChar>
 inline SerializedValue<TChar*> serialized(TChar* p) {
-  return SerializedValue<TChar*>(p, wrapString(p).size());
+  return SerializedValue<TChar*>(p, adaptString(p).size());
 }
 
 template <typename TChar>

src/ArduinoJson/Misc/Visitable.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once
@@ -15,4 +15,7 @@ struct Visitable {
 
 template <typename T>
 struct IsVisitable : is_base_of<Visitable, T> {};
+
+template <typename T>
+struct IsVisitable<T&> : IsVisitable<T> {};
 }  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/MsgPack/MsgPackDeserializer.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once
@@ -17,7 +17,6 @@ template <typename TReader, typename TStringStorage>
 class MsgPackDeserializer {
   typedef typename remove_reference<TStringStorage>::type::StringBuilder
       StringBuilder;
-  typedef const char *StringType;
 
  public:
   MsgPackDeserializer(MemoryPool &pool, TReader reader,
@@ -227,20 +226,20 @@ class MsgPackDeserializer {
   }
 
   template <typename T>
-  DeserializationError readString(StringType &str) {
+  DeserializationError readString(const char *&str) {
     T size;
     if (!readInteger(size)) return DeserializationError::IncompleteInput;
     return readString(str, size);
   }
 
   DeserializationError readString(VariantData &variant, size_t n) {
-    StringType s;
+    const char *s;
     DeserializationError err = readString(s, n);
-    if (!err) variant.setOwnedString(s);
+    if (!err) variant.setOwnedString(make_not_null(s));
     return err;
   }
 
-  DeserializationError readString(StringType &result, size_t n) {
+  DeserializationError readString(const char *&result, size_t n) {
     StringBuilder builder = _stringStorage.startString();
     for (; n; --n) {
       uint8_t c;
@@ -287,10 +286,10 @@ class MsgPackDeserializer {
       VariantSlot *slot = object.addSlot(_pool);
       if (!slot) return DeserializationError::NoMemory;
 
-      StringType key;
+      const char *key;
       DeserializationError err = parseKey(key);
       if (err) return err;
-      slot->setOwnedKey(key);
+      slot->setOwnedKey(make_not_null(key));
 
       err = parse(*slot->data());
       if (err) return err;
@@ -299,7 +298,7 @@ class MsgPackDeserializer {
     return DeserializationError::Ok;
   }
 
-  DeserializationError parseKey(StringType &key) {
+  DeserializationError parseKey(const char *&key) {
     uint8_t code;
     if (!readByte(code)) return DeserializationError::IncompleteInput;
 
@@ -326,24 +325,31 @@ class MsgPackDeserializer {
   uint8_t _nestingLimit;
 };
 
-template <typename TDocument, typename TInput>
-DeserializationError deserializeMsgPack(TDocument &doc, const TInput &input) {
-  return deserialize<MsgPackDeserializer>(doc, input);
+template <typename TInput>
+DeserializationError deserializeMsgPack(
+    JsonDocument &doc, const TInput &input,
+    NestingLimit nestingLimit = NestingLimit()) {
+  return deserialize<MsgPackDeserializer>(doc, input, nestingLimit);
 }
 
-template <typename TDocument, typename TInput>
-DeserializationError deserializeMsgPack(TDocument &doc, TInput *input) {
-  return deserialize<MsgPackDeserializer>(doc, input);
+template <typename TInput>
+DeserializationError deserializeMsgPack(
+    JsonDocument &doc, TInput *input,
+    NestingLimit nestingLimit = NestingLimit()) {
+  return deserialize<MsgPackDeserializer>(doc, input, nestingLimit);
 }
 
-template <typename TDocument, typename TInput>
-DeserializationError deserializeMsgPack(TDocument &doc, TInput *input,
-                                        size_t inputSize) {
-  return deserialize<MsgPackDeserializer>(doc, input, inputSize);
+template <typename TInput>
+DeserializationError deserializeMsgPack(
+    JsonDocument &doc, TInput *input, size_t inputSize,
+    NestingLimit nestingLimit = NestingLimit()) {
+  return deserialize<MsgPackDeserializer>(doc, input, inputSize, nestingLimit);
 }
 
-template <typename TDocument, typename TInput>
-DeserializationError deserializeMsgPack(TDocument &doc, TInput &input) {
-  return deserialize<MsgPackDeserializer>(doc, input);
+template <typename TInput>
+DeserializationError deserializeMsgPack(
+    JsonDocument &doc, TInput &input,
+    NestingLimit nestingLimit = NestingLimit()) {
+  return deserialize<MsgPackDeserializer>(doc, input, nestingLimit);
 }
 }  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/MsgPack/MsgPackSerializer.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/MsgPack/endianess.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/MsgPack/ieee754.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Namespace.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once
@@ -19,4 +19,5 @@
 #define ARDUINOJSON_NAMESPACE                                                  \
   ARDUINOJSON_CONCAT8(ArduinoJson, ARDUINOJSON_VERSION_MAJOR,                  \
                       ARDUINOJSON_VERSION_MINOR, ARDUINOJSON_VERSION_REVISION, \
-                      _, ARDUINOJSON_USE_LONG_LONG, _, ARDUINOJSON_USE_DOUBLE)
+                      _, ARDUINOJSON_USE_LONG_LONG, ARDUINOJSON_USE_DOUBLE,    \
+                      ARDUINOJSON_DECODE_UNICODE)

src/ArduinoJson/Numbers/Float.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Numbers/FloatParts.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Numbers/FloatTraits.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Numbers/Integer.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Numbers/isFloat.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Numbers/isInteger.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Numbers/parseFloat.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Numbers/parseInteger.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Object/MemberProxy.hpp

@@ -0,0 +1,189 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2019
+// MIT License
+
+#pragma once
+
+#include "../Configuration.hpp"
+#include "../Operators/VariantOperators.hpp"
+#include "../Polyfills/type_traits.hpp"
+
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable : 4522)
+#endif
+
+namespace ARDUINOJSON_NAMESPACE {
+
+template <typename TObject, typename TStringRef>
+class MemberProxy : public VariantOperators<MemberProxy<TObject, TStringRef> >,
+                    public Visitable {
+  typedef MemberProxy<TObject, TStringRef> this_type;
+
+ public:
+  FORCE_INLINE MemberProxy(TObject variant, TStringRef key)
+      : _object(variant), _key(key) {}
+
+  FORCE_INLINE operator VariantConstRef() const {
+    return getUpstreamMember();
+  }
+
+  FORCE_INLINE this_type &operator=(const this_type &src) {
+    getOrAddUpstreamMember().set(src);
+    return *this;
+  }
+
+  template <typename TValue>
+  FORCE_INLINE typename enable_if<!is_array<TValue>::value, this_type &>::type
+  operator=(const TValue &src) {
+    getOrAddUpstreamMember().set(src);
+    return *this;
+  }
+
+  // operator=(char*) const
+  // operator=(const char*) const
+  // operator=(const __FlashStringHelper*) const
+  template <typename TChar>
+  FORCE_INLINE this_type &operator=(TChar *src) {
+    getOrAddUpstreamMember().set(src);
+    return *this;
+  }
+
+  FORCE_INLINE void clear() const {
+    getUpstreamMember().clear();
+  }
+
+  FORCE_INLINE bool isNull() const {
+    return getUpstreamMember().isNull();
+  }
+
+  template <typename TValue>
+  FORCE_INLINE typename VariantAs<TValue>::type as() const {
+    return getUpstreamMember().template as<TValue>();
+  }
+
+  template <typename TValue>
+  FORCE_INLINE bool is() const {
+    return getUpstreamMember().template is<TValue>();
+  }
+
+  FORCE_INLINE size_t size() const {
+    return getUpstreamMember().size();
+  }
+
+  FORCE_INLINE void remove(size_t index) const {
+    getUpstreamMember().remove(index);
+  }
+  // remove(char*) const
+  // remove(const char*) const
+  // remove(const __FlashStringHelper*) const
+  template <typename TChar>
+  FORCE_INLINE typename enable_if<IsString<TChar *>::value>::type remove(
+      TChar *key) const {
+    getUpstreamMember().remove(key);
+  }
+  // remove(const std::string&) const
+  // remove(const String&) const
+  template <typename TString>
+  FORCE_INLINE typename enable_if<IsString<TString>::value>::type remove(
+      const TString &key) const {
+    getUpstreamMember().remove(key);
+  }
+
+  template <typename TValue>
+  FORCE_INLINE typename VariantTo<TValue>::type to() {
+    return getOrAddUpstreamMember().template to<TValue>();
+  }
+
+  template <typename TValue>
+  FORCE_INLINE typename enable_if<!is_array<TValue>::value, bool>::type set(
+      const TValue &value) {
+    return getOrAddUpstreamMember().set(value);
+  }
+
+  // set(char*) const
+  // set(const char*) const
+  // set(const __FlashStringHelper*) const
+  template <typename TChar>
+  FORCE_INLINE bool set(const TChar *value) {
+    return getOrAddUpstreamMember().set(value);
+  }
+
+  template <typename Visitor>
+  void accept(Visitor &visitor) const {
+    return getUpstreamMember().accept(visitor);
+  }
+
+  FORCE_INLINE VariantRef addElement() const {
+    return getOrAddUpstreamMember().addElement();
+  }
+
+  // getElement(size_t) const
+  FORCE_INLINE VariantRef getElement(size_t index) const {
+    return getUpstreamMember().getElement(index);
+  }
+
+  // getMember(char*) const
+  // getMember(const char*) const
+  // getMember(const __FlashStringHelper*) const
+  template <typename TChar>
+  FORCE_INLINE VariantRef getMember(TChar *key) const {
+    return getUpstreamMember().getMember(key);
+  }
+
+  // getMember(const std::string&) const
+  // getMember(const String&) const
+  template <typename TString>
+  FORCE_INLINE VariantRef getMember(const TString &key) const {
+    return getUpstreamMember().getMember(key);
+  }
+
+  // getOrAddMember(char*) const
+  // getOrAddMember(const char*) const
+  // getOrAddMember(const __FlashStringHelper*) const
+  template <typename TChar>
+  FORCE_INLINE VariantRef getOrAddMember(TChar *key) const {
+    return getOrAddUpstreamMember().getOrAddMember(key);
+  }
+
+  // getOrAddMember(const std::string&) const
+  // getOrAddMember(const String&) const
+  template <typename TString>
+  FORCE_INLINE VariantRef getOrAddMember(const TString &key) const {
+    return getOrAddUpstreamMember().getOrAddMember(key);
+  }
+
+ private:
+  FORCE_INLINE VariantRef getUpstreamMember() const {
+    return _object.getMember(_key);
+  }
+
+  FORCE_INLINE VariantRef getOrAddUpstreamMember() const {
+    return _object.getOrAddMember(_key);
+  }
+
+  TObject _object;
+  TStringRef _key;
+};
+
+template <typename TObject>
+template <typename TString>
+inline typename enable_if<IsString<TString>::value,
+                          MemberProxy<const TObject &, const TString &> >::type
+    ObjectShortcuts<TObject>::operator[](const TString &key) const {
+  return MemberProxy<const TObject &, const TString &>(*impl(), key);
+}
+
+template <typename TObject>
+template <typename TString>
+inline typename enable_if<IsString<TString *>::value,
+                          MemberProxy<const TObject &, TString *> >::type
+    ObjectShortcuts<TObject>::operator[](TString *key) const {
+  return MemberProxy<const TObject &, TString *>(*impl(), key);
+}
+
+}  // namespace ARDUINOJSON_NAMESPACE
+
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif

src/ArduinoJson/Object/ObjectFunctions.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once
@@ -16,8 +16,8 @@ void objectAccept(const CollectionData *obj, Visitor &visitor) {
     visitor.visitNull();
 }
 
-template <typename TKey>
-inline bool objectContainsKey(const CollectionData *obj, TKey key) {
+template <typename TAdaptedString>
+inline bool objectContainsKey(const CollectionData *obj, TAdaptedString key) {
   return obj && obj->containsKey(key);
 }
 
@@ -27,20 +27,21 @@ inline bool objectEquals(const CollectionData *lhs, const CollectionData *rhs) {
   return lhs->equalsObject(*rhs);
 }
 
-template <typename TKey>
-inline VariantData *objectGet(const CollectionData *obj, TKey key) {
+template <typename TAdaptedString>
+inline VariantData *objectGet(const CollectionData *obj, TAdaptedString key) {
   if (!obj) return 0;
   return obj->get(key);
 }
 
-template <typename TKey>
-void objectRemove(CollectionData *obj, TKey key) {
+template <typename TAdaptedString>
+void objectRemove(CollectionData *obj, TAdaptedString key) {
   if (!obj) return;
   obj->remove(key);
 }
 
-template <typename TKey>
-inline VariantData *objectSet(CollectionData *obj, TKey key, MemoryPool *pool) {
+template <typename TAdaptedString>
+inline VariantData *objectGetOrCreate(CollectionData *obj, TAdaptedString key,
+                                      MemoryPool *pool) {
   if (!obj) return 0;
 
   // ignore null key

src/ArduinoJson/Object/ObjectImpl.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once
@@ -9,13 +9,30 @@
 
 namespace ARDUINOJSON_NAMESPACE {
 
+template <typename TObject>
 template <typename TString>
-inline ArrayRef ObjectRef::createNestedArray(const TString& key) const {
-  return set(key).template to<ArrayRef>();
+inline ArrayRef ObjectShortcuts<TObject>::createNestedArray(
+    const TString& key) const {
+  return impl()->getOrAddMember(key).template to<ArrayRef>();
 }
 
+template <typename TObject>
+template <typename TChar>
+inline ArrayRef ObjectShortcuts<TObject>::createNestedArray(TChar* key) const {
+  return impl()->getOrAddMember(key).template to<ArrayRef>();
+}
+
+template <typename TObject>
 template <typename TString>
-inline ArrayRef ObjectRef::createNestedArray(TString* key) const {
-  return set(key).template to<ArrayRef>();
+inline ObjectRef ObjectShortcuts<TObject>::createNestedObject(
+    const TString& key) const {
+  return impl()->getOrAddMember(key).template to<ObjectRef>();
+}
+
+template <typename TObject>
+template <typename TChar>
+inline ObjectRef ObjectShortcuts<TObject>::createNestedObject(
+    TChar* key) const {
+  return impl()->getOrAddMember(key).template to<ObjectRef>();
 }
 }  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/Object/ObjectIterator.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Object/ObjectRef.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once
@@ -17,31 +17,42 @@ namespace ARDUINOJSON_NAMESPACE {
 template <typename TData>
 class ObjectRefBase {
  public:
+  operator VariantConstRef() const {
+    return VariantConstRef(reinterpret_cast<const VariantData*>(_data));
+  }
+
   template <typename Visitor>
   FORCE_INLINE void accept(Visitor& visitor) const {
     objectAccept(_data, visitor);
   }
 
-  // Tells weither the specified key is present and associated with a value.
-  //
-  // bool containsKey(TKey);
-  // TKey = const std::string&, const String&
-  template <typename TKey>
-  FORCE_INLINE bool containsKey(const TKey& key) const {
-    return objectContainsKey(_data, wrapString(key));
+  // containsKey(const std::string&) const
+  // containsKey(const String&) const
+  template <typename TString>
+  FORCE_INLINE bool containsKey(const TString& key) const {
+    return objectContainsKey(_data, adaptString(key));
   }
-  //
-  // bool containsKey(TKey);
-  // TKey = char*, const char*, char[], const char[], const __FlashStringHelper*
-  template <typename TKey>
-  FORCE_INLINE bool containsKey(TKey* key) const {
-    return objectContainsKey(_data, wrapString(key));
+
+  // containsKey(char*) const
+  // containsKey(const char*) const
+  // containsKey(const __FlashStringHelper*) const
+  template <typename TChar>
+  FORCE_INLINE bool containsKey(TChar* key) const {
+    return objectContainsKey(_data, adaptString(key));
   }
 
   FORCE_INLINE bool isNull() const {
     return _data == 0;
   }
 
+  FORCE_INLINE size_t memoryUsage() const {
+    return _data ? _data->memoryUsage() : 0;
+  }
+
+  FORCE_INLINE size_t nesting() const {
+    return _data ? _data->nesting() : 0;
+  }
+
   FORCE_INLINE size_t size() const {
     return _data ? _data->size() : 0;
   }
@@ -71,41 +82,38 @@ class ObjectConstRef : public ObjectRefBase<const CollectionData>,
     return iterator();
   }
 
-  // Gets the value associated with the specified key.
-  //
-  // TValue get<TValue>(TKey) const;
-  // TKey = const std::string&, const String&
-  // TValue = bool, char, long, int, short, float, double,
-  //          std::string, String, ArrayConstRef, ObjectConstRef
-  template <typename TKey>
-  FORCE_INLINE VariantConstRef get(const TKey& key) const {
-    return get_impl(wrapString(key));
-  }
-  //
-  // TValue get<TValue>(TKey) const;
-  // TKey = char*, const char*, const __FlashStringHelper*
-  // TValue = bool, char, long, int, short, float, double,
-  //          std::string, String, ArrayConstRef, ObjectConstRef
-  template <typename TKey>
-  FORCE_INLINE VariantConstRef get(TKey* key) const {
-    return get_impl(wrapString(key));
+  // getMember(const std::string&) const
+  // getMember(const String&) const
+  template <typename TString>
+  FORCE_INLINE VariantConstRef getMember(const TString& key) const {
+    return get_impl(adaptString(key));
   }
 
-  //
-  // VariantConstRef operator[](TKey) const;
-  // TKey = const std::string&, const String&
-  template <typename TKey>
-  FORCE_INLINE typename enable_if<IsString<TKey>::value, VariantConstRef>::type
-  operator[](const TKey& key) const {
-    return get_impl(wrapString(key));
+  // getMember(char*) const
+  // getMember(const char*) const
+  // getMember(const __FlashStringHelper*) const
+  template <typename TChar>
+  FORCE_INLINE VariantConstRef getMember(TChar* key) const {
+    return get_impl(adaptString(key));
   }
-  //
-  // VariantConstRef operator[](TKey) const;
-  // TKey = const char*, const char[N], const __FlashStringHelper*
-  template <typename TKey>
-  FORCE_INLINE typename enable_if<IsString<TKey*>::value, VariantConstRef>::type
-  operator[](TKey* key) const {
-    return get_impl(wrapString(key));
+
+  // operator[](const std::string&) const
+  // operator[](const String&) const
+  template <typename TString>
+  FORCE_INLINE
+      typename enable_if<IsString<TString>::value, VariantConstRef>::type
+      operator[](const TString& key) const {
+    return get_impl(adaptString(key));
+  }
+
+  // operator[](char*) const
+  // operator[](const char*) const
+  // operator[](const __FlashStringHelper*) const
+  template <typename TChar>
+  FORCE_INLINE
+      typename enable_if<IsString<TChar*>::value, VariantConstRef>::type
+      operator[](TChar* key) const {
+    return get_impl(adaptString(key));
   }
 
   FORCE_INLINE bool operator==(ObjectConstRef rhs) const {
@@ -113,13 +121,15 @@ class ObjectConstRef : public ObjectRefBase<const CollectionData>,
   }
 
  private:
-  template <typename TKey>
-  FORCE_INLINE VariantConstRef get_impl(TKey key) const {
+  template <typename TAdaptedString>
+  FORCE_INLINE VariantConstRef get_impl(TAdaptedString key) const {
     return VariantConstRef(objectGet(_data, key));
   }
 };
 
-class ObjectRef : public ObjectRefBase<CollectionData>, public Visitable {
+class ObjectRef : public ObjectRefBase<CollectionData>,
+                  public ObjectShortcuts<ObjectRef>,
+                  public Visitable {
   typedef ObjectRefBase<CollectionData> base_type;
 
  public:
@@ -151,73 +161,39 @@ class ObjectRef : public ObjectRefBase<CollectionData>, public Visitable {
     _data->clear();
   }
 
-  FORCE_INLINE bool copyFrom(ObjectConstRef src) {
+  FORCE_INLINE bool set(ObjectConstRef src) {
     if (!_data || !src._data) return false;
     return _data->copyFrom(*src._data, _pool);
   }
 
-  // Creates and adds a ArrayRef.
-  //
-  // ArrayRef createNestedArray(TKey);
-  // TKey = const std::string&, const String&
-  template <typename TKey>
-  FORCE_INLINE ArrayRef createNestedArray(const TKey& key) const;
-  // ArrayRef createNestedArray(TKey);
-  // TKey = char*, const char*, char[], const char[], const __FlashStringHelper*
-  template <typename TKey>
-  FORCE_INLINE ArrayRef createNestedArray(TKey* key) const;
-
-  // Creates and adds a ObjectRef.
-  //
-  // ObjectRef createNestedObject(TKey);
-  // TKey = const std::string&, const String&
-  template <typename TKey>
-  FORCE_INLINE ObjectRef createNestedObject(const TKey& key) const {
-    return set(key).template to<ObjectRef>();
-  }
-  //
-  // ObjectRef createNestedObject(TKey);
-  // TKey = char*, const char*, char[], const char[], const __FlashStringHelper*
-  template <typename TKey>
-  FORCE_INLINE ObjectRef createNestedObject(TKey* key) const {
-    return set(key).template to<ObjectRef>();
+  // getMember(const std::string&) const
+  // getMember(const String&) const
+  template <typename TString>
+  FORCE_INLINE VariantRef getMember(const TString& key) const {
+    return get_impl(adaptString(key));
   }
 
-  // Gets the value associated with the specified key.
-  //
-  // TValue get<TValue>(TKey) const;
-  // TKey = const std::string&, const String&
-  // TValue = bool, char, long, int, short, float, double,
-  //          std::string, String, ArrayRef, ObjectRef
-  template <typename TKey>
-  FORCE_INLINE VariantRef get(const TKey& key) const {
-    return get_impl(wrapString(key));
-  }
-  //
-  // TValue get<TValue>(TKey) const;
-  // TKey = char*, const char*, const __FlashStringHelper*
-  // TValue = bool, char, long, int, short, float, double,
-  //          std::string, String, ArrayRef, ObjectRef
-  template <typename TKey>
-  FORCE_INLINE VariantRef get(TKey* key) const {
-    return get_impl(wrapString(key));
+  // getMember(char*) const
+  // getMember(const char*) const
+  // getMember(const __FlashStringHelper*) const
+  template <typename TChar>
+  FORCE_INLINE VariantRef getMember(TChar* key) const {
+    return get_impl(adaptString(key));
   }
 
-  // Gets or sets the value associated with the specified key.
-  //
-  // ObjectSubscript operator[](TKey)
-  // TKey = const std::string&, const String&
-  template <typename TKey>
-  FORCE_INLINE ObjectSubscript<const TKey&> operator[](const TKey& key) const {
-    return ObjectSubscript<const TKey&>(*this, key);
+  // getOrAddMember(const std::string&) const
+  // getOrAddMember(const String&) const
+  template <typename TString>
+  FORCE_INLINE VariantRef getOrAddMember(const TString& key) const {
+    return getOrCreate_impl(adaptString(key));
   }
-  //
-  // ObjectSubscript operator[](TKey)
-  // TKey = char*, const char*, char[], const char[N], const
-  // __FlashStringHelper*
-  template <typename TKey>
-  FORCE_INLINE ObjectSubscript<TKey*> operator[](TKey* key) const {
-    return ObjectSubscript<TKey*>(*this, key);
+
+  // getOrAddMember(char*) const
+  // getOrAddMember(const char*) const
+  // getOrAddMember(const __FlashStringHelper*) const
+  template <typename TChar>
+  FORCE_INLINE VariantRef getOrAddMember(TChar* key) const {
+    return getOrCreate_impl(adaptString(key));
   }
 
   FORCE_INLINE bool operator==(ObjectRef rhs) const {
@@ -229,41 +205,30 @@ class ObjectRef : public ObjectRefBase<CollectionData>, public Visitable {
     _data->remove(it.internal());
   }
 
-  // Removes the specified key and the associated value.
-  //
-  // void remove(TKey);
-  // TKey = const std::string&, const String&
-  template <typename TKey>
-  FORCE_INLINE void remove(const TKey& key) const {
-    objectRemove(_data, wrapString(key));
-  }
-  //
-  // void remove(TKey);
-  // TKey = char*, const char*, char[], const char[], const __FlashStringHelper*
-  template <typename TKey>
-  FORCE_INLINE void remove(TKey* key) const {
-    objectRemove(_data, wrapString(key));
+  // remove(const std::string&) const
+  // remove(const String&) const
+  template <typename TString>
+  FORCE_INLINE void remove(const TString& key) const {
+    objectRemove(_data, adaptString(key));
   }
 
-  template <typename TKey>
-  FORCE_INLINE VariantRef set(TKey* key) const {
-    return set_impl(wrapString(key));
-  }
-
-  template <typename TKey>
-  FORCE_INLINE VariantRef set(const TKey& key) const {
-    return set_impl(wrapString(key));
+  // remove(char*) const
+  // remove(const char*) const
+  // remove(const __FlashStringHelper*) const
+  template <typename TChar>
+  FORCE_INLINE void remove(TChar* key) const {
+    objectRemove(_data, adaptString(key));
   }
 
  private:
-  template <typename TKey>
-  FORCE_INLINE VariantRef get_impl(TKey key) const {
+  template <typename TAdaptedString>
+  FORCE_INLINE VariantRef get_impl(TAdaptedString key) const {
     return VariantRef(_pool, objectGet(_data, key));
   }
 
-  template <typename TKey>
-  FORCE_INLINE VariantRef set_impl(TKey key) const {
-    return VariantRef(_pool, objectSet(_data, key, _pool));
+  template <typename TAdaptedString>
+  FORCE_INLINE VariantRef getOrCreate_impl(TAdaptedString key) const {
+    return VariantRef(_pool, objectGetOrCreate(_data, key, _pool));
   }
 
   MemoryPool* _pool;

src/ArduinoJson/Object/ObjectShortcuts.hpp

@@ -0,0 +1,61 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2019
+// MIT License
+
+#pragma once
+
+#include "../Polyfills/attributes.hpp"
+#include "../Polyfills/type_traits.hpp"
+#include "../Strings/StringAdapters.hpp"
+
+namespace ARDUINOJSON_NAMESPACE {
+template <typename TParent, typename TStringRef>
+class MemberProxy;
+
+template <typename TObject>
+class ObjectShortcuts {
+ public:
+  // operator[](const std::string&) const
+  // operator[](const String&) const
+  template <typename TString>
+  FORCE_INLINE
+      typename enable_if<IsString<TString>::value,
+                         MemberProxy<const TObject &, const TString &> >::type
+      operator[](const TString &key) const;
+
+  // operator[](char*) const
+  // operator[](const char*) const
+  // operator[](const __FlashStringHelper*) const
+  template <typename TChar>
+  FORCE_INLINE typename enable_if<IsString<TChar *>::value,
+                                  MemberProxy<const TObject &, TChar *> >::type
+  operator[](TChar *key) const;
+
+  // createNestedArray(const std::string&) const
+  // createNestedArray(const String&) const
+  template <typename TString>
+  FORCE_INLINE ArrayRef createNestedArray(const TString &key) const;
+
+  // createNestedArray(char*) const
+  // createNestedArray(const char*) const
+  // createNestedArray(const __FlashStringHelper*) const
+  template <typename TChar>
+  FORCE_INLINE ArrayRef createNestedArray(TChar *key) const;
+
+  // createNestedObject(const std::string&) const
+  // createNestedObject(const String&) const
+  template <typename TString>
+  ObjectRef createNestedObject(const TString &key) const;
+
+  // createNestedObject(char*) const
+  // createNestedObject(const char*) const
+  // createNestedObject(const __FlashStringHelper*) const
+  template <typename TChar>
+  ObjectRef createNestedObject(TChar *key) const;
+
+ private:
+  const TObject *impl() const {
+    return static_cast<const TObject *>(this);
+  }
+};
+}  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/Object/ObjectSubscript.hpp

@@ -1,132 +0,0 @@
-// ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
-// MIT License
-
-#pragma once
-
-#include "../Configuration.hpp"
-#include "../Operators/VariantOperators.hpp"
-#include "../Polyfills/type_traits.hpp"
-
-#ifdef _MSC_VER
-#pragma warning(push)
-#pragma warning(disable : 4522)
-#endif
-
-namespace ARDUINOJSON_NAMESPACE {
-
-template <typename TStringRef>
-class ObjectSubscript : public VariantOperators<ObjectSubscript<TStringRef> >,
-                        public Visitable {
-  typedef ObjectSubscript<TStringRef> this_type;
-
- public:
-  FORCE_INLINE ObjectSubscript(ObjectRef object, TStringRef key)
-      : _object(object), _key(key) {}
-
-  operator VariantConstRef() const {
-    return get_impl();
-  }
-
-  FORCE_INLINE this_type &operator=(const this_type &src) {
-    set_impl().set(src);
-    return *this;
-  }
-
-  // Set the specified value
-  //
-  // operator=(const TValue&);
-  // TValue = bool, char, long, int, short, float, double,
-  //          std::string, String, ArrayRef, ObjectRef
-  template <typename TValue>
-  FORCE_INLINE typename enable_if<!is_array<TValue>::value, this_type &>::type
-  operator=(const TValue &src) {
-    set_impl().set(src);
-    return *this;
-  }
-  //
-  // operator=(TValue);
-  // TValue = char*, const char*, const __FlashStringHelper*
-  template <typename TValue>
-  FORCE_INLINE this_type &operator=(TValue *src) {
-    set_impl().set(src);
-    return *this;
-  }
-
-  FORCE_INLINE bool isNull() const {
-    return get_impl().isNull();
-  }
-
-  template <typename TValue>
-  FORCE_INLINE typename VariantAs<TValue>::type as() const {
-    return get_impl().template as<TValue>();
-  }
-
-  template <typename TValue>
-  FORCE_INLINE bool is() const {
-    return get_impl().template is<TValue>();
-  }
-
-  template <typename TValue>
-  FORCE_INLINE typename VariantTo<TValue>::type to() {
-    return set_impl().template to<TValue>();
-  }
-
-  // Sets the specified value.
-  //
-  // bool set(const TValue&);
-  // TValue = bool, char, long, int, short, float, double, serialized,
-  // VariantRef,
-  //          std::string, String, ArrayRef, ObjectRef
-  template <typename TValue>
-  FORCE_INLINE typename enable_if<!is_array<TValue>::value, bool>::type set(
-      const TValue &value) {
-    return set_impl().set(value);
-  }
-  //
-  // bool set(TValue);
-  // TValue = char*, const char, const __FlashStringHelper*
-  template <typename TValue>
-  FORCE_INLINE bool set(const TValue *value) {
-    return set_impl().set(value);
-  }
-
-  template <typename Visitor>
-  void accept(Visitor &visitor) const {
-    return get_impl().accept(visitor);
-  }
-
- private:
-  FORCE_INLINE VariantRef get_impl() const {
-    return _object.get(_key);
-  }
-
-  FORCE_INLINE VariantRef set_impl() const {
-    return _object.set(_key);
-  }
-
-  ObjectRef _object;
-  TStringRef _key;
-};
-
-template <typename TImpl>
-template <typename TString>
-inline typename enable_if<IsString<TString>::value,
-                          ObjectSubscript<const TString &> >::type
-    VariantSubscripts<TImpl>::operator[](const TString &key) const {
-  return impl()->template as<ObjectRef>()[key];
-}
-
-template <typename TImpl>
-template <typename TString>
-inline typename enable_if<IsString<TString *>::value,
-                          ObjectSubscript<TString *> >::type
-    VariantSubscripts<TImpl>::operator[](TString *key) const {
-  return impl()->template as<ObjectRef>()[key];
-}
-
-}  // namespace ARDUINOJSON_NAMESPACE
-
-#ifdef _MSC_VER
-#pragma warning(pop)
-#endif

src/ArduinoJson/Object/Pair.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once
@@ -13,7 +13,7 @@ class Pair {
  public:
   Pair(MemoryPool* pool, VariantSlot* slot) {
     if (slot) {
-      _key = slot->key();
+      _key = String(slot->key(), !slot->ownsKey());
       _value = VariantRef(pool, slot->data());
     }
   }
@@ -35,7 +35,7 @@ class PairConst {
  public:
   PairConst(const VariantSlot* slot) {
     if (slot) {
-      _key = slot->key();
+      _key = String(slot->key(), !slot->ownsKey());
       _value = VariantConstRef(slot->data());
     }
   }

src/ArduinoJson/Operators/VariantCasts.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Operators/VariantComparisons.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once
@@ -21,28 +21,28 @@ class VariantComparisons {
   template <typename T>
   friend typename enable_if<IsString<T *>::value, bool>::type operator==(
       T *lhs, TVariant rhs) {
-    return wrapString(lhs).equals(rhs.template as<const char *>());
+    return adaptString(lhs).equals(rhs.template as<const char *>());
   }
 
   // std::string == TVariant
   template <typename T>
   friend typename enable_if<IsString<T>::value, bool>::type operator==(
       const T &lhs, TVariant rhs) {
-    return wrapString(lhs).equals(rhs.template as<const char *>());
+    return adaptString(lhs).equals(rhs.template as<const char *>());
   }
 
   // TVariant == const char*
   template <typename T>
   friend typename enable_if<IsString<T *>::value, bool>::type operator==(
       TVariant lhs, T *rhs) {
-    return wrapString(rhs).equals(lhs.template as<const char *>());
+    return adaptString(rhs).equals(lhs.template as<const char *>());
   }
 
   // TVariant == std::string
   template <typename T>
   friend typename enable_if<IsString<T>::value, bool>::type operator==(
       TVariant lhs, const T &rhs) {
-    return wrapString(rhs).equals(lhs.template as<const char *>());
+    return adaptString(rhs).equals(lhs.template as<const char *>());
   }
 
   // bool/int/float == TVariant
@@ -63,28 +63,28 @@ class VariantComparisons {
   template <typename T>
   friend typename enable_if<IsString<T *>::value, bool>::type operator!=(
       T *lhs, TVariant rhs) {
-    return !wrapString(lhs).equals(rhs.template as<const char *>());
+    return !adaptString(lhs).equals(rhs.template as<const char *>());
   }
 
   // std::string != TVariant
   template <typename T>
   friend typename enable_if<IsString<T>::value, bool>::type operator!=(
       const T &lhs, TVariant rhs) {
-    return !wrapString(lhs).equals(rhs.template as<const char *>());
+    return !adaptString(lhs).equals(rhs.template as<const char *>());
   }
 
   // TVariant != const char*
   template <typename T>
   friend typename enable_if<IsString<T *>::value, bool>::type operator!=(
       TVariant lhs, T *rhs) {
-    return !wrapString(rhs).equals(lhs.template as<const char *>());
+    return !adaptString(rhs).equals(lhs.template as<const char *>());
   }
 
   // TVariant != std::string
   template <typename T>
   friend typename enable_if<IsString<T>::value, bool>::type operator!=(
       TVariant lhs, const T &rhs) {
-    return !wrapString(rhs).equals(lhs.template as<const char *>());
+    return !adaptString(rhs).equals(lhs.template as<const char *>());
   }
 
   // bool/int/float != TVariant

src/ArduinoJson/Operators/VariantOperators.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once
@@ -7,7 +7,7 @@
 #include "VariantCasts.hpp"
 #include "VariantComparisons.hpp"
 #include "VariantOr.hpp"
-#include "VariantSubscripts.hpp"
+#include "VariantShortcuts.hpp"
 
 namespace ARDUINOJSON_NAMESPACE {
 
@@ -15,5 +15,5 @@ template <typename TImpl>
 class VariantOperators : public VariantCasts<TImpl>,
                          public VariantComparisons<TImpl>,
                          public VariantOr<TImpl>,
-                         public VariantSubscripts<TImpl> {};
+                         public VariantShortcuts<TImpl> {};
 }  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/Operators/VariantOr.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Operators/VariantShortcuts.hpp

@@ -0,0 +1,23 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2019
+// MIT License
+
+#pragma once
+
+#include "../Array/ArrayShortcuts.hpp"
+#include "../Object/ObjectShortcuts.hpp"
+
+namespace ARDUINOJSON_NAMESPACE {
+
+template <typename TVariant>
+class VariantShortcuts : public ObjectShortcuts<TVariant>,
+                         public ArrayShortcuts<TVariant> {
+ public:
+  using ArrayShortcuts<TVariant>::createNestedArray;
+  using ArrayShortcuts<TVariant>::createNestedObject;
+  using ArrayShortcuts<TVariant>::operator[];
+  using ObjectShortcuts<TVariant>::createNestedArray;
+  using ObjectShortcuts<TVariant>::createNestedObject;
+  using ObjectShortcuts<TVariant>::operator[];
+};
+}  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/Operators/VariantSubscripts.hpp

@@ -1,51 +0,0 @@
-// ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
-// MIT License
-
-#pragma once
-
-#include "../Polyfills/attributes.hpp"
-#include "../Polyfills/type_traits.hpp"
-#include "../Strings/StringWrappers.hpp"
-#include "../Variant/VariantAs.hpp"
-
-namespace ARDUINOJSON_NAMESPACE {
-class ArrayRef;
-class ObjectRef;
-
-// Forward declarations.
-class ArraySubscript;
-template <typename TKey>
-class ObjectSubscript;
-
-template <typename TImpl>
-class VariantSubscripts {
- public:
-  // Mimics an array.
-  // Returns the element at specified index if the variant is an array.
-  FORCE_INLINE ArraySubscript operator[](size_t index) const;
-
-  // Mimics an object.
-  // Returns the value associated with the specified key if the variant is
-  // an object.
-  //
-  // ObjectSubscript operator[](TKey) const;
-  // TKey = const std::string&, const String&
-  template <typename TString>
-  FORCE_INLINE typename enable_if<IsString<TString>::value,
-                                  ObjectSubscript<const TString &> >::type
-  operator[](const TString &key) const;
-  //
-  // ObjectSubscript operator[](TKey) const;
-  // TKey = const char*, const char[N], const __FlashStringHelper*
-  template <typename TString>
-  FORCE_INLINE typename enable_if<IsString<TString *>::value,
-                                  ObjectSubscript<TString *> >::type
-  operator[](TString *key) const;
-
- private:
-  const TImpl *impl() const {
-    return static_cast<const TImpl *>(this);
-  }
-};
-}  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/Polyfills/assert.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Polyfills/attributes.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Polyfills/ctype.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Polyfills/gsl/not_null.hpp

@@ -0,0 +1,33 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2019
+// MIT License
+
+#pragma once
+
+#include "../assert.hpp"
+
+namespace ARDUINOJSON_NAMESPACE {
+
+template <typename T>
+class not_null {
+ public:
+  explicit not_null(T ptr) : _ptr(ptr) {
+    ARDUINOJSON_ASSERT(ptr != NULL);
+  }
+
+  T get() const {
+    ARDUINOJSON_ASSERT(_ptr != NULL);
+    return _ptr;
+  }
+
+ private:
+  T _ptr;
+};
+
+template <typename T>
+not_null<T> make_not_null(T ptr) {
+  ARDUINOJSON_ASSERT(ptr != NULL);
+  return not_null<T>(ptr);
+}
+
+}  // namespace ARDUINOJSON_NAMESPACE

src/ArduinoJson/Polyfills/math.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Polyfills/mpl/max.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Polyfills/type_traits.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Polyfills/type_traits/conditional.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Polyfills/type_traits/enable_if.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once

src/ArduinoJson/Polyfills/type_traits/integral_constant.hpp

@@ -1,5 +1,5 @@
 // ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
+// Copyright Benoit Blanchon 2014-2019
 // MIT License
 
 #pragma once