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From: jlg@cochiti.lanl.gov (Jim Giles)
Newsgroups: comp.lang.fortran
Subject: Re: Questions about IF
Message-ID: <26384@lanl.gov>
Date: 24 Jun 91 23:18:38 GMT
References: <scNB_TG00WBMQ0ykwM@andrew.cmu.edu> <1991Jun24.213601.11329@milton.u.washington.edu>
Sender: news@lanl.gov
Organization: Los Alamos National Laboratory
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Actually, the standard does require that no optimization 
violate parenthesis.  So you can force the order of
evaluation any way you want:

      If (expr1 .and. (expr2.and.expr3)) then
         ...

This does the second '.and.' first.  The other question was about
short-circuiting: the standard _allows_ short-circuiting but does
not _require_ it.

J. Giles