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 25434edf3e.

Return true if matching characters are found.

constexpr bool
contains(
    char c) const;

See core::string_view::contains