PerlIO::scalar - in-memory IO, scalar IO
A filehandle is opened but the file operations are performed "in-memory" on a scalar variable. All the normal file operations can be performed on the handle. The scalar is considered a stream of bytes. Currently fileno($fh) returns -1.
only exists to use XSLoader to load C code that
provides support for treating a scalar as an "in memory" file.
One does not need to explicitly