I am trying out the derived type i/o available since version 14 of the compiler and running into problems when reading from an internal file. With the following code:
module m_prb_dtio_1 type t integer :: a contains procedure :: fmtread => t_read_formatted generic :: read(formatted) => fmtread end type t contains subroutine t_read_formatted(dtv, unit, iotype, vlist, iostat, iomsg) class(t), intent(inout) :: dtv integer, intent(in) :: unit character(len=*), intent(in) :: iotype integer, intent(in) :: vlist(:) integer, intent(out) :: iostat character(len=*), intent(inout) :: iomsg read(unit, fmt="(i2)", iostat=iostat, iomsg=iomsg) dtv%a end subroutine end module m_prb_dtio_1 program test use m_prb_dtio_1 character(len=100) :: str integer ios type(t) :: t1, t2 str = "42" open (10, file="test.input") write(10, fmt="(A)") str rewind(10) read (10, fmt="(DT)", iostat=ios) t1 print *, "ios:", ios, ", t1 :", t1 read (unit=str, fmt="(DT)", iostat=ios) t2 print *, "ios:", ios, ", t2 :", t2 end program
The output is :
C:>ifort prb_dtio_1.f90 Intel(R) Visual Fortran Compiler XE for applications running on IA-32, Version 22.214.171.124 Build 20140130 Copyright (C) 1985-2014 Intel Corporation. All rights reserved. Microsoft (R) Incremental Linker Version 10.00.40219.01 Copyright (C) Microsoft Corporation. All rights reserved. -out:prb_dtio_1.exe -subsystem:console prb_dtio_1.obj C:>prb_dtio_1 ios: 0 , t1 : 42 ios: 48 , t2 : 0
As far as I understand the standard, derived type I/O should work for internal files as well. As I have no other compiler that supports this at hand, I can not be certain if the error is in my code or a bug in ifort
P.S. I posted this already once a few hours ago, but the post did not appear.