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Re: [Patch, Fortran] PR34514 - prevent double initialization and dimension changes after initialization

From: Jerry DeLisle <jvdelisle at verizon dot net>
To: Tobias Burnus <burnus at net-b dot de>
Cc: gcc-patches <gcc-patches at gcc dot gnu dot org>, "'fortran at gcc dot gnu dot org'" <fortran at gcc dot gnu dot org>
Date: Mon, 24 Dec 2007 06:56:29 -0800
Subject: Re: [Patch, Fortran] PR34514 - prevent double initialization and dimension changes after initialization
References: <4766DA91.2090402@net-b.de>

Tobias Burnus wrote:

It is completely unclear what value "n" has after:

  integer :: n = 4
  dimension :: n(3)


similarly invalid is:
  integer :: n = 5
  parameter (n = 7)

This patch adds checks to reject this.

Please try to come up with things which should be rejected; I think
there are none, but I still might have missed something.  ;-)

Build and regtested on x86-64. OK for the trunk?

Tobias

PS: I did not check the standard, but ifort and NAG f95 reject it. As it
makes sense, I believe these compilers. If needed be, I can still try to
find it in the standard.

OK to commit

Jerry

References:
- [Patch, Fortran] PR34514 - prevent double initialization and dimension changes after initialization
  - From: Tobias Burnus

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