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Re: [Patch, Fortran] PR 47448 - fix defined assignment check

From: Jerry DeLisle <jvdelisle at frontier dot com>
To: Tobias Burnus <burnus at net-b dot de>
Cc: gfortran <fortran at gcc dot gnu dot org>, gcc patches <gcc-patches at gcc dot gnu dot org>
Date: Tue, 25 Jan 2011 05:22:44 -0800
Subject: Re: [Patch, Fortran] PR 47448 - fix defined assignment check
References: <4D3EC24E.9090907@net-b.de>

On 01/25/2011 04:30 AM, Tobias Burnus wrote:

Defined assignment ("interface assignment(=)") is not allowed to override
intrinsic assignments. In particular, it is invalid to override
array = scalar
array = array ! for the same rank
while it is valid to use
scalar = array
array = array ! for different ranks.

Seemingly before 2009-08-10 (cf. PR 37425) all those where rejected. However,
with that patch accidentally "array = scalar" and not "scalar = array" became
accepted.

Thus, the patch below fixes a regression in the sense that no error message is
printed with 4.5/4.6 for the invalid test case. However, the valid case was
never allowed.

Build and regtested on x86-64-linux
OK for the trunk? Does anyone want to see this backported to a branch?

Yes, OK and thanks for quick patch.

Jerry

References:
- [Patch, Fortran] PR 47448 - fix defined assignment check
  - From: Tobias Burnus

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