[gfortran,patch] Fix zero-length substrings

[tobias.schlueter@physik.uni-muenchen.de]

FX Coudert <fxcoudert@gmail.com> wrote on Thu, 08 Jun 2006:
> The patch sets substring length to zero if it is computed (from the
> start and end bounds) to be negative, fixing all these problems. I
> also added a check to avoid calls to _gfortran_copy_string when the
> destination length is zero, for example: d(5:4) = "foobar".

Using MAX_EXPR would be even simpler.

> Regtested on i686-linux, it comes with a testcase that failed in
> various places before the patch. OK for mainline and 4.1?

Ok, with the change to MAX_EXPR if you like.

- Tobi

:REVIEWMAIL:

----------------------------------------------------------------
This message was sent using IMP, the Internet Messaging Program.