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From: peter@sugar.UUCP (Peter da Silva)
Newsgroups: comp.lang.c
Subject: Re: MSC C arithmetic
Message-ID: <526@sugar.UUCP>
Date: Thu, 20-Aug-87 19:20:44 EDT
Article-I.D.: sugar.526
Posted: Thu Aug 20 19:20:44 1987
Date-Received: Sun, 23-Aug-87 11:23:09 EDT
References: <8792@brl-adm.ARPA>
Organization: Sugar Land UNIX - Houston, TX
Lines: 22
Summary: It's within the spec of the language.


>	long = int * int. Should it become long = long * long.

Depends on how you break up the expression. I would expect the compiler
to parse like this:

		expr
		/|\
	       / | \
	    expr = expr		promote to long
		   /|\
		  / | \
	       expr * expr	leave integer

This is more efficient, for one thing. It also means the compiler doesn't
have to worry about propogating promotion rules into subexpressions. The
expression ends up looking like:

	long = (long)(int)
	     = (long)(int * int).
-- 
-- Peter da Silva `-_-' ...!seismo!soma!uhnix1!sugar!peter (I said, NO PHOTOS!)