get_backend_from_filename Function

public function get_backend_from_filename(filename) result(backend_type)

Determine backend type from file extension

Special filenames: - "terminal": Uses ASCII backend and outputs to stdout

filename: Output filename Returns backend_type: Backend identifier string

Arguments

Type	Intent	Optional	Attributes		Name
character(len=*),	intent(in)			::	filename

Return Value character(len=20)