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

This is the documentation for a snapshot of the develop branch, built from commit 3785d1f795.

Return an iterator to the beginning.

constexpr iterator
begin();
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constexpr const_iterator
begin() const;
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