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Subject: [Bug fortran/51976] [F2003] Support deferred-length character components of derived types (allocatable string length)
Date: Sat, 09 Feb 2013 20:34:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51976

--- Comment #7 from Paul Thomas <pault at gcc dot gnu.org> 2013-02-09 20:33:56 UTC ---
Created attachment 29406
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29406
Draft patch for the PR

This turned out to be easier than I expected.  It obviously needs a bit of
cleaning up; deferred character length variables should be made consistent with
their variable cousins.  This will not take much doing and I expect to submit
the patch tomorrow.

Bootstraps and regtests on trunk.  Proto-testcase:
  type t
    character(len=:), allocatable :: str_comp
  end type t
  type(t) :: x
  allocate (x%str_comp, source = "abc")
  print *, len (x%str_comp), x%str_comp

  deallocate (x%str_comp)

  allocate (x%str_comp, source = "abcdefghijklmnop")
  print *, len (x%str_comp), x%str_comp

  x%str_comp = "xyz"
  print *, len (x%str_comp), x%str_comp

  x%str_comp = "abcdefghijklmnop"
  call foo (x%str_comp)
contains
  subroutine foo (chr)
    character (*) :: chr
    print *, len (chr), chr
  end subroutine
end

Cheers

Paul