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

Header <boost/optional/bad_optional_access.hpp>
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namespace boost {

class bad_optional_access : public std::logic_error
{
public:
    bad_optional_access(); 
};

} // namespace boost

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