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

Retrieves the underlying value as a blob (unchecked access).

constexpr blob_view
get_blob() const;

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

No-throw guarantee.

The returned view has the same lifetime rules as *this (it's valid as long as *this is valid).