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 b14f8ca719.

Retrieves a reference to the underlying double value (unchecked access).

double&
get_double() noexcept;

this->is_double() == true (if violated, results in undefined behavior).

No-throw guarantee.

The returned reference is valid as long as *this is alive and no function that invalidates references is called on *this.