std::deque::at

 

C++

Language

Standard library headers

Concepts

Utilities library

Strings library

Containers library

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Iterators library

Numerics library

Input/output library

Localizations library

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

 

Containers library

array (C++11)

dynarray (C++14)

vector

deque

forward_list (C++11)

list

set

multiset

map

multimap

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unordered_multiset (C++11)

unordered_map (C++11)

unordered_multimap (C++11)

stack

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std::deque

Member functions

deque::deque

deque::~deque

deque::operator=

deque::assign

deque::get_allocator

Element access

deque::front

deque::back

Iterators

deque::begin deque::cbegin (C++11)

deque::end deque::cend (C++11)

deque::rbegin deque::crbegin (C++11)

deque::rend deque::crend (C++11)

Capacity

deque::empty

deque::size

deque::max_size

deque::shrink_to_fit

Modifiers

deque::clear

deque::insert

deque::emplace

deque::erase

deque::push_front

deque::emplace_front

deque::pop_front

deque::push_back

deque::emplace_back

deque::pop_back

deque::resize

deque::swap

 

reference       at( size_type pos );
constexpr const_reference at( size_type pos ) const;

Returns a reference to the element at specified location pos, with bounds checking.

If pos not within the range of the container, an exception of type std::out_of_range is thrown.

Parameters

pos

-

position of the element to return

Return value

reference to the requested element

Exceptions

std::out_of_range if !(pos < size()).

Complexity

Constant

Notes

Const version is marked as constexpr since c++14

See also

operator[]	access specified element (public member function)