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 5f0ff1c60c.

Return the last character.

constexpr reference
back();
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constexpr const_reference
back() const;
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