string_view support for object access

doc/mkdocs/docs/api/basic_json/at.md

@@ -6,8 +6,10 @@ reference at(size_type idx);
 const_reference at(size_type idx) const;
 
 // (2)
-reference at(const typename object_t::key_type& key);
-const_reference at(const typename object_t::key_type& key) const;
+template<typename KeyT>
+reference at(KeyT && key);
+template<typename KeyT>
+const_reference at(KeyT && key) const;
 
 // (3)
 reference at(const json_pointer& ptr);
@@ -18,6 +20,12 @@ const_reference at(const json_pointer& ptr) const;
 2. Returns a reference to the element at with specified key `key`, with bounds checking.
 3. Returns a reference to the element at with specified JSON pointer `ptr`, with bounds checking.
 
+## Template parameters
+
+`KeyT`
+:   A type for an object key other than `basic_json::json_pointer`. This can also be a string literal or a string view
+    (C++17).
+
 ## Parameters
 
 `idx` (in)

doc/mkdocs/docs/api/basic_json/contains.md

@@ -11,7 +11,8 @@ value is not an object, `#!cpp false` is returned.
 ## Template parameters
 
 `KeyT`
-:   A type for an object key other than `basic_json::json_pointer`.
+:   A type for an object key other than `basic_json::json_pointer`. This can also be a string literal or a string view 
+    (C++17).
 
 ## Parameters
 

doc/mkdocs/docs/api/basic_json/count.md

@@ -2,7 +2,7 @@
 
 ```cpp
 template<typename KeyT>
-size_type count(KeyT&& key) const;
+size_type count(KeyT && key) const;
 ```
 
 Returns the number of elements with key `key`. If `ObjectType` is the default `std::map` type, the return value will
@@ -11,7 +11,7 @@ always be `0` (`key` was not found) or `1` (`key` was found).
 ## Template parameters
 
 `KeyT`
-:   A type for an object key.
+:   A type for an object key. This can also be a string literal or a string view (C++17).
 
 ## Parameters
 

doc/mkdocs/docs/api/basic_json/erase.md

@@ -10,7 +10,8 @@ iterator erase(iterator first, iterator last);
 const_iterator erase(const_iterator first, const_iterator last);
 
 // (3)
-size_type erase(const typename object_t::key_type& key);
+template<typename KeyT>
+size_type erase(KeyT && key);
 
 // (4)
 void erase(const size_type idx);
@@ -31,6 +32,11 @@ void erase(const size_type idx);
 
 4. Removes an element from a JSON array by index.
 
+## Template parameters
+
+`KeyT`
+:   A type convertible to an object key. This can also be a string literal or a string view (C++17).
+
 ## Parameters
 
 `pos` (in)

doc/mkdocs/docs/api/basic_json/find.md

@@ -2,10 +2,10 @@
 
 ```cpp
 template<typename KeyT>
-iterator find(KeyT&& key);
+iterator find(KeyT && key);
 
 template<typename KeyT>
-const_iterator find(KeyT&& key) const
+const_iterator find(KeyT && key) const
 ```
 
 Finds an element in a JSON object with key equivalent to `key`. If the element is not found or the JSON value is not an
@@ -14,7 +14,7 @@ object, `end()` is returned.
 ## Template parameters
 
 `KeyT`
-:   A type for an object key.
+:   A type for an object key. This can also be a string literal or a string view (C++17).
 
 ## Parameters
 

doc/mkdocs/docs/api/basic_json/operator[].md

@@ -6,8 +6,10 @@ reference operator[](size_type idx);
 const_reference operator[](size_type idx) const;
 
 // (2)
-reference operator[](const typename object_t::key_type& key);
-const_reference operator[](const typename object_t::key_type& key) const;
+template<typename KeyT>
+reference operator[](KeyT && key);
+template<typename KeyT>
+const_reference operator[](KeyT && key) const;
 template<typename T>
 reference operator[](T* key);
 template<typename T>
@@ -24,6 +26,10 @@ const_reference operator[](const json_pointer& ptr) const;
 
 ## Template parameters
 
+`KeyT`
+:   A type for an object key other than `basic_json::json_pointer`. This can also be a string literal or a string view
+    (C++17).
+
 `T`
 :   string literal convertible to `object_t::key_type`