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 date value or throws an exception.

const date&
as_date() const;

Strong guarantee. Throws on type mismatch.

Type	Thrown On
`bad_field_access`	If `!this->is_date()`

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