[Bug fortran/51976] New: [F2003] Support deferred-length character components of derived types (allocatable string length)

[burnus at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51976

             Bug #: 51976
           Summary: [F2003] Support deferred-length character components
                    of derived types (allocatable string length)
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: burnus@gcc.gnu.org
            Blocks: 45170


See also PR 45170 comment 9 - and the examples in PR fortran/51550, PR
fortran/47545, PR fortran/49050 and PR fortran/51075.

Currently, using

type t
  character(len=:), allocatable :: str_comp
end type t

is not supported and is rejected by a not-yet-supported error.

TODO: There needs to be a hidden (integer) component, which stores the string
length.