value::if

`value::if_array`

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

array const*
if_array() const noexcept; (1)

array*
if_array() noexcept; (2)

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.