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Path: utzoo!utgpu!utcsri!greg
From: greg@utcsri.UUCP
Newsgroups: comp.lang.c
Subject: Re: goto's and switch statements -- mild proposal
Message-ID: <5301@utcsri.UUCP>
Date: Wed, 31-Dec-69 18:59:59 EDT
Article-I.D.: utcsri.5301
Posted: Wed Dec 31 18:59:59 1969
Date-Received: Sun, 23-Aug-87 23:44:01 EDT
References: <855@tjalk.cs.vu.nl> <2683@hoptoad.uucp> <916@haddock.ISC.COM> <298@auvax.UUCP> <10265@orchid.waterloo.edu> <6289@brl-smoke.ARPA>
Reply-To: greg@utcsri.UUCP (Gregory Smith)
Organization: CSRI, University of Toronto
Lines: 28
Summary: 

In article <6289@brl-smoke.ARPA> gwyn@brl.arpa (Doug Gwyn (VLD/VMB) <gwyn>) writes:
>In article <10265@orchid.waterloo.edu> rbutterworth@orchid.waterloo.edu (Ray Butterworth) writes:
>>    case 'a' :: 'z' :
>
>There's another serious problem underlying all these suggestions;
>namely, that "a through z" has a well-defined meaning.  Working
[...]
>in a general, i.e. international, environment.  Personally I
>think any assumption that there is a standard "dictionary order"
>based solely on "letter" sequencing for a given language is naive.
>
>Probably an application would be much better off using
>	if ( isalpha( c ) )
>		...
>or some other <ctype.h> function instead.  That is more likely to
>give the desired behavior outside the USASCII environment.

If you want it to run fast, and be portable:
	switch(char_class[c])[
		case IS_UPPER:	/*etc*/

...with char_class pre-stuffed using isupper, etc.
Or generate the entire switch automatically using another program.

-- 
----------------------------------------------------------------------
Greg Smith     University of Toronto      UUCP: ..utzoo!utcsri!greg
Have vAX, will hack...