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From: lai@mips.COM (David Lai)
Newsgroups: comp.sys.mips
Subject: Re: mips cc bug
Message-ID: <39142@mips.mips.COM>
Date: 30 May 90 07:44:14 GMT
References: <1990May28.152151.5506@maytag.waterloo.edu>
Sender: news@mips.COM
Reply-To: lai@mips.COM (David Lai)
Organization: MIPS Computer Systems, Sunnyvale, CA
Lines: 52

In article <1990May28.152151.5506@maytag.waterloo.edu> gamiddon@maytag.waterloo.edu (Guy Middleton) writes:
>This code works everywhere except on my MIPS machine:
>
>typedef enum Foo {
>	None=0,
>	Some,
>	All
>} Foo;
>
>main() {
>	Foo x, y;
>
>	x = (None<<2)|Some;
>
>	switch (x) {
>	case (((unsigned)None)<<2)|(((unsigned)Some)):
>			printf( "blah\n" );
>			break;
>	}
>}
>
>MIPS cc says:
>ccom: Error: enum.c, line 13: non-constant case expression
>	case (((unsigned)None)<<2)|(((unsigned)Some)):
>      -----------------------------------------------^

Bug has been fixed for the 2.10 release:

lai> cat x.c
typedef enum Foo {
        None=0,
        Some,
        All
} Foo;

main() {
        Foo x, y;
        x = (None<<2)|Some;

        switch (x) {
        case (((unsigned)None)<<2)|(((unsigned)Some)):
                      printf( "blah\n" );
                        break;
        }
}
lai> cc -o x x.c
lai> x
blah

-- 
        "What is a DJ if he can't scratch?"  - Uncle Jamms Army
     David Lai (lai@mips.com || {ames,prls,pyramid,decwrl}!mips!lai)