sub nativecast

Documentation for sub nativecast, assembled from the following types:

language documentation Native Calling Interface

From Native Calling Interface

(Native Calling Interface) sub nativecast

sub nativecast($target-type$sourceis export(:DEFAULT)

This will cast the Pointer $source to an object of $target-type. The source pointer will typically have been obtained from a call to a native subroutine that returns a pointer or as a member of a struct, this may be specified as void * in the C library definition for instance, but you may also cast from a pointer to a less specific type to a more specific one.

As a special case, if a Signature is supplied as $target-type then a subroutine will be returned which will call the native function pointed to by $source in the same way as a subroutine declared with the native trait. This is described in Function Pointers.