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 ec9f6e560b.

Return a bool pointer if this is a boolean, else return nullptr

bool const*
if_bool() const;
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bool*
if_bool();
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