Currently, we ignore the following:
$ cat unformatted_stream_backspace.f90
program main
open(2003,form="unformatted",access="stream")
write (2003) 1
write (2003) 2
backspace 2003
end program main
$ gfortran unformatted_stream_backspace.f90
$ ./a.out
$
This code is actually illegal, we could (but are not required to)
catch this:
F 2003 draft, 9.7:
A file that is connected for unformatted stream access shall not be referred to
by a BACKSPACE statement.
--
Summary: unformatted stream prohibits BACKSPACE
Product: gcc
Version: 4.3.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: enhancement
Priority: P3
Component: libfortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: tkoenig at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34405
