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 master branch, built from commit 0dda8a8483.

Return the number of fields with the specified name.

std::size_t
count(
    string_view name) const;

Name	Description
`name`	The field name. It is interpreted as a case-insensitive string.