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From: ark@alice.UUCP (Andrew Koenig)
Newsgroups: net.micro.pc,net.lang.f77
Subject: Re: stupid problem in fortran
Message-ID: <3658@alice.UUCP>
Date: Fri, 26-Apr-85 11:13:44 EST
Article-I.D.: alice.3658
Posted: Fri Apr 26 11:13:44 1985
Date-Received: Sat, 27-Apr-85 05:19:30 EST
References: <5318@tektronix.UUCP>
Organization: Bell Labs, Murray Hill
Lines: 21
Xref: watmath net.micro.pc:3776 net.lang.f77:270

From the Fortran 77 standard, pages 10-2 to 10-3:

The form of a character assignment statement is:

	v = e

where: v is the name of a character variable, character array element,
	or character substring
       e is a character expression

Execution of a character assignment statement causes the evaluation
of the expression e and the assignment and definition of v with the
value of e.  None of the character positions being defined in v
may be referenced in e.

Thus, a statement of the form

	var = 'c' // var

violates the standard and an implementor is not obliged to allow it
or even implement it sensibly.