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module write_09_m
type :: mytype
character(len=:), allocatable :: raw
end type
interface write(unformatted)
module procedure :: my_write
end interface
contains
subroutine my_write(x, unit, iostat, iomsg)
class(mytype), intent(in) :: x
integer, intent(in) :: unit
integer, intent(out) :: iostat
character(len=*), intent(inout) :: iomsg
write(unit, iostat=iostat, iomsg=iomsg) len(x%raw)
end subroutine
end module
program write_09
use write_09_m
implicit none
type(mytype) :: x
integer :: u, iostat
character(len=100) :: iomsg
x%raw = "hello"
open(newunit=u, form="unformatted", status="scratch")
write(u, iostat=iostat, iomsg=iomsg) x
close(u)
end program write_09
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