std::unordered_map<Key,T,Hash,KeyEqual,Allocator>::at
Min standard notice:
Returns a reference to the mapped value of the element with specified key. If no such element exists, an exception of type std::out_of_range is thrown.
# Declarations
T& at( const Key& key );
(since C++11)
const T& at( const Key& key ) const;
(since C++11)
template< class K >
T& at( const K& x );
(since C++26)
template< class K >
const T& at( const K& x ) const;
(since C++26)
# Parameters
key: the key of the element to findx: a value of any type that can be transparently compared with a key
# Return value
A reference to the mapped value of the requested element.
# Notes
Feature-test macro Value Std Feature __cpp_lib_associative_heterogeneous_insertion 202311L (C++26) Heterogeneous overloads for the remaining member functions in ordered and unordered associative containers. (3,4)
# Example
This section is incompleteReason: no example