std::vector::at

 

C++

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

Returns a reference to the element at specified location pos. Bounds checking is performed, exception of type std::out_of_range will be thrown on invalid access.

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)