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[Patch, fortran] Clean up of error recovery in DTIO procedures

From: Paul Richard Thomas <paul dot richard dot thomas at gmail dot com>
To: "fortran at gcc dot gnu dot org" <fortran at gcc dot gnu dot org>, gcc-patches <gcc-patches at gcc dot gnu dot org>
Cc: gerhard dot steinmetz dot fortran at t-online dot de, Damian Rouson <damian at sourceryinstitute dot org>, jerry DeLisle <jvdelisle at charter dot net>
Date: Wed, 21 Sep 2016 12:18:45 +0200
Subject: [Patch, fortran] Clean up of error recovery in DTIO procedures
Authentication-results: sourceware.org; auth=none

Dear All,

Please find attached a patch to clean up the various issues with
errors in DTIO procedures. The tests were all provided by Gerhard
Steinmetz for which thanks are due.

I intend to commit this patch as 'obvious' tomorrow morning unless
there are any objections in the meantime.

Bootstrapped and regtested on x86_64/FC21 - OK for trunk?

Paul

2016-09-21  Paul Thomas  <pault@gcc.gnu.org>

    * interface.c (check_dtio_interface1): Introduce errors for
    alternate returns and incorrect numbers of arguments.
    (gfc_find_specific_dtio_proc): Return cleanly if the derived
    type either doesn't exist or has no namespace.

2016-09-21  Paul Thomas  <pault@gcc.gnu.org>

    * gfortran.dg/dtio_13.f90: New test.

Attachment: submit.diff
Description: Text document

Follow-Ups:
- Re: [Patch, fortran] Clean up of error recovery in DTIO procedures
  - From: Paul Richard Thomas
- Re: [Patch, fortran] Clean up of error recovery in DTIO procedures
  - From: Rainer Orth

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