Remove basic_json proxy type

CHANGELOG.md

@@ -1,4 +1,19 @@
-0.178.0 (on master)
+0.179.0 (on master)
+-------
+
+Changes:
+
+- Removed `basic_json` proxy type. The rationale for this change is given in #315.
+
+- The new behavior for the non-const overload of operator[](const string_view_type&) will follow the standard library 
+`std::map` behavior, that is, return a reference to the value that is associated with the key, inserting a default 
+constructed value with the key if no such key already exists.
+
+- The new behavior for the const overload of operator[](const string_view_type&) will be to return 
+a const reference to the value that is associated with key, returning a const reference to a default 
+constructed value with static storage duration if no such key already exists.
+
+0.178.0
 -------
 
 Defect fixes:

doc/ref/corelib/basic_json.md

@@ -98,6 +98,7 @@ Member type                         |Definition
 `const_object_range_type`|range<const_object_iterator,const_array_iterator>     (since 0.173.3)
 `array_range_type`|range<array_iterator,const_array_iterator>                   (since 0.173.3)
 `const_array_range_type`|range<const_array_iterator,const_array_iterator>       (since 0.173.3)
+`proxy_type`|proxy<basic_json>. The `proxy_type` class supports conversion to `basic_json&`. (removed in 0.179.0)
 
 ### Static member functions
 

doc/ref/corelib/json/operator_at.md

@@ -34,7 +34,7 @@ when this operator is used for reading but the key does not exist.
 
 ### Examples
 
-#### Assigning to a proxy when the key does not exist
+#### Assigning to and` object when the key does not exist
 
 ```cpp
 int main()