Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

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rows::at

Returns the i-th row or throws an exception.

Synopsis

row_view
at(
    std::size_t i) const;

Exception safety

Strong guranatee. Throws on invalid input.

Exceptions

Type	Thrown On
`std::out_of_range`	`i >= this->size()`

Complexity

Constant.