std::array<T,N>::at
From cppreference.com
reference at( size_type pos ); |
(1) | (since C++11) (constexpr since C++17) |
const_reference at( size_type pos ) const; |
(2) | (since C++11) (constexpr since C++14) |
Returns a reference to the element at specified location pos, with bounds checking.
If pos is not within the range of the container, an exception of type std::out_of_range is thrown.
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