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upgrade to 6.18
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@@ -1,9 +1,11 @@
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ArduinoJson: change log
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=======================
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HEAD
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----
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v6.18.0 (2021-05-05)
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-------
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* Added support for custom converters (issue #687)
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* Added support for `Printable` (issue #1444)
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* Removed support for `char` values, see below (issue #1498)
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* `deserializeJson()` leaves `\uXXXX` unchanged instead of returning `NotSupported`
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* `deserializeMsgPack()` inserts `null` instead of returning `NotSupported`
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@@ -11,9 +13,17 @@ HEAD
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* Added `JsonVariant::is<JsonArrayConst/JsonObjectConst>()` (issue #1412)
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* Added `JsonVariant::is<JsonVariant/JsonVariantConst>()` (issue #1412)
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* Changed `JsonVariantConst::is<JsonArray/JsonObject>()` to return `false` (issue #1412)
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* Simplified `JsonVariant::as<T>()` to always return `T` (see below)
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* Updated folders list in `.mbedignore` (PR #1515 by @AGlass0fMilk)
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* Fixed member-call-on-null-pointer in `getMember()` when array is empty
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* `serializeMsgPack(doc, buffer, size)` doesn't add null-terminator anymore (issue #1545)
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* `serializeJson(doc, buffer, size)` adds null-terminator only if there is enough room
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* PlatformIO: set `build.libArchive` to `false` (PR #1550 by @askreet)
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> ### BREAKING CHANGES
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>
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> #### Support for `char` removed
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>
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> We cannot cast a `JsonVariant` to a `char` anymore, so the following will break:
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> ```c++
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> char age = doc["age"]; // error: no matching function for call to 'variantAs(VariantData*&)'
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@@ -33,6 +43,31 @@ HEAD
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> int8_t age;
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> doc["age"] = age; // OK
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> ```
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> A deprecation warning with the message "Support for `char` is deprecated, use `int8_t` or `uint8_t` instead" was added to allow a smooth transition.
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>
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> #### `as<T>()` always returns `T`
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>
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> Previously, `JsonVariant::as<T>()` could return a type different from `T`.
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> The most common example is `as<char*>()` that returned a `const char*`.
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> While this feature simplified a few use cases, it was confusing and complicated the
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> implementation of custom converters.
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>
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> Starting from this version, `as<T>` doesn't try to auto-correct the return type and always return `T`,
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> which means that you cannot write this anymore:
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>
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> ```c++
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> Serial.println(doc["sensor"].as<char*>()); // error: invalid conversion from 'const char*' to 'char*' [-fpermissive]
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> ```
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>
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> Instead, you must write:
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>
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> ```c++
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> Serial.println(doc["sensor"].as<const char*>()); // OK
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> ```
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>
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> A deprecation warning with the message "Replace `as<char*>()` with `as<const char*>()`" was added to allow a smooth transition.
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>
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> #### `DeserializationError::NotSupported` removed
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>
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> On a different topic, `DeserializationError::NotSupported` has been removed.
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> Instead of returning this error:
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@@ -40,7 +75,9 @@ HEAD
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> * `deserializeJson()` leaves `\uXXXX` unchanged (only when `ARDUINOJSON_DECODE_UNICODE` is `0`)
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> * `deserializeMsgPack()` replaces unsupported values with `null`s
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>
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> Lastly, a very minor change conserns `JsonVariantConst::is<T>()`.
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> #### Const-aware `is<T>()`
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>
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> Lastly, a very minor change concerns `JsonVariantConst::is<T>()`.
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> It used to return `true` for `JsonArray` and `JsonOject`, but now it returns `false`.
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> Instead, you must use `JsonArrayConst` and `JsonObjectConst`.
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