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

Record a failure.

Synopsis

template<
    class = void>
void
fail(
    std::string const& reason = "");

Description Parameters

Name	Description
`reason`	Optional text added to the output on a failure.
`file`	The source code file where the test failed.
`line`	The source code line number where the test failed.