What are the function declarations for the member functions previouskey and insert in the given code snippet?
The function declaration for the member function previouskey is:
const key previouskey(const key & k) const
It takes a constant reference to an object of type key as a parameter and returns a constant reference to an object of type key.
The function declaration for the member function insert is:
bool insert(const key & k, const value & v)
It takes two constant references as parameters - one to an object of type key and another to an object of type value. It returns a bool value indicating whether the insertion was successful or not.
Function Declarations in the Code Snippet:
In the provided code snippet, there are function declarations for two member functions - previouskey and insert.
Previouskey Function:
The previouskey function is declared with the signature const key previouskey(const key & k) const. This function takes a constant reference to an object of type key as a parameter.
When this function is called with a key object as an argument, it returns a constant reference to another key object.
Insert Function:
The insert function is declared with the signature bool insert(const key & k, const value & v). This function takes two constant reference parameters - one of type key and another of type value.
Upon execution, the insert function attempts to insert the key-value pair into a data structure. If the insertion is successful, it returns a boolean value of true. Otherwise, it returns false.