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

array::operator[]

Access an element.

value&
operator[](
    std::size_t pos) & noexcept;
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value&&
operator[](
    std::size_t pos) && noexcept;
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value const&
operator[](
    std::size_t pos) const& noexcept;
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