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

Format a kind to an output stream.

Defined in header <boost/json/kind.hpp>

std::ostream&
operator<<(
    std::ostream& os,
    kind k);

This allows a kind to be formatted as a string, typically for diagnostics.

The output stream.

Name	Description
`os`	The output stream to format to.
`k`	The kind to format.

Convenience header <boost/json.hpp>