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

value::as_string

Return a reference to the underlying string, or throw an exception.

string&&
as_string(
    boost::source_location const& loc = BOOST_CURRENT_LOCATION) &&;
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string const&
as_string(
    boost::source_location const& loc = BOOST_CURRENT_LOCATION) const&;
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string&
as_string(
    boost::source_location const& loc = BOOST_CURRENT_LOCATION) &;
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