cpp/filesystem/is block file

Checks if the given file status or path corresponds to a block special file, as if determined by the POSIX. Examples of block special files are block devices such as or  on Linux.

@1@ Equivalent to. @2@ Equivalent to or.

Return value
if the file indicated by or if the type indicated  refers to a block device. The non-throwing overload returns if an error occurs.

Exceptions
@2@