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 e83975fcee.

Return an array pointer if this is an array, else return nullptr

array*
if_array();

If this->kind() == kind::array, returns a pointer to the underlying array. Otherwise, returns nullptr.

The return value is used in both a boolean context and to assign a variable:

if ( auto p = jv.if_array() )
    return *p;

Constant.

No-throw guarantee.