Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!yale!cmcl2!lanl!jlg
From: jlg@lanl.gov (Jim Giles)
Newsgroups: comp.lang.fortran
Subject: Re: Function calls in the middle of subroutine CALLs? -- Is it standard fortran 77 ????
Message-ID: <58237@lanl.gov>
Date: 26 Jul 90 23:44:43 GMT
References: <2009@key.COM>
Organization: Los Alamos Natl Lab, Los Alamos, N.M.
Lines: 14

From article <2009@key.COM>, by sjc@key.COM (Steve Correll):
> [...]
> 	X .GT. Y .OR. L(Z)
> 
> where L is a logical function which defines its dummy argument. The standard
> says that if X is greater than Y, then Z becomes undefined. Not very user-
> friendly, but Fortran programmers have traditionally been tough as nails.

Since this started as a comparison to C, let's remember that C is just
as bad here.  You can't predict a-priori whether the function L() will
be executed in either language.  In pretty much any language, it's a
bad idea to have functions with side-effects in a context like this.

J. Giles