<div class="gmail_quote">On Mon, Aug 27, 2012 at 3:48 PM, Blaise Bourdin <span dir="ltr"><<a href="mailto:bourdin@lsu.edu" target="_blank">bourdin@lsu.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
actually, what is the meaning of is in fortran? I can't find it as a keyword in any of my 2003 ref, so it must be a 2008 or later thing.</blockquote></div><br><div>See Fortran 2003 section 8.1.5 SELECT TYPE construct. There are phrase TYPE IS, CLASS IS, and CLASS DEFAULT.</div>
<div><br></div><div>It appears that a lone IS doesn't parse specially, but if you use this construct, the PETSc's IS definition causes trouble.</div>