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 an older version of Boost and was released in 2018. The current version is 1.89.0.

http::ext_list::exists

http::ext_list::exists

Return true if a token is present in the list.

Synopsis

template<
    class T>
bool
exists(
    T const& s);

Description

Parameters

Name	Description
`s`	The token to find. A case-insensitive comparison is used.