std::unordered_map::at

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C++ Standard Library
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Containers library
array (C++11) vector deque forward_list (C++11) list set multiset map multimap unordered_set (C++11) unordered_multiset (C++11) unordered_map (C++11) unordered_multimap (C++11) stack queue priority_queue
std::unordered_map
Member functions unordered_map::unordered_map unordered_map::~unordered_map unordered_map::operator= unordered_map::get_allocator Iterators unordered_map::begin unordered_map::cbegin unordered_map::end unordered_map::cend Capacity unordered_map::erase unordered_map::size unordered_map::max_size Modifiers unordered_map::clear unordered_map::insert unordered_map::emplace unordered_map::emplace_hint unordered_map::erase unordered_map::swap Lookup unordered_map::count unordered_map::find unordered_map::equal_range Bucket interface unordered_map::begin(int) unordered_map::end(int) unordered_map::bucket_count unordered_map::max_bucket_count unordered_map::bucket_size unordered_map::bucket Hash policy unordered_map::load_factor unordered_map::max_load_factor unordered_map::rehash unordered_map::reserve Observers unordered_map::hash_function unordered_map::key_eq

T& at( const Key& key );	(1)	(C++11 feature)
T& at( Key&& key );	(2)	(C++11 feature)

Returns a reference to the mapped value of the element with key equivalent to key. If no such element exist, exception of type std::out_of_range is thrown.

Contents 1 Parameters 2 Return value 3 Exceptions 4 Complexity 5 See also

[edit] Parameters

key

-

the key of the element to find

[edit] Return value

reference to the mapped value of the requested element

[edit] Exceptions

std::out_of_range if the container does not have an element with the key key

[edit] Complexity

This section is incomplete

[edit] See also

operator[]	access specified element (public member function)