[M3commit] CVS Update: cm3

[Tony Hosking]

Huh?

On 5 Jul 2010, at 17:15, Jay K wrote:

> 
> At least some of these were Word.T. "valid" is still "random" and the code is unpredictable, at least by a quick read, even if type safe.
> Type safe is just a minimum bar, one that should always be exceeded, even if the compiler is completely unable to validate it.
> 
> That is, the compiler guarantees are from sufficient relative to correctness.
> 
>  - Jay
> 
> ----------------------------------------
>> From: hosking at cs.purdue.edu
>> Date: Mon, 5 Jul 2010 16:50:00 -0400
>> To: jay.krell at cornell.edu
>> CC: m3commit at elegosoft.com
>> Subject: Re: [M3commit] CVS Update: cm3
>> 
>> But we've been this route before. Modula-3 ensures every variable is initialised with a valid value. I don't see how your adding an initialiser makes it more obviously correct.
>> 
>> On 5 Jul 2010, at 16:45, Jay K wrote:
>> 
>>> 
>>> I will maybe see about doing better here.
>>> Initializing locals doesn't seem like such a bad change though.
>>> I like the code to be "obviously correct" by a quick read by a human.
>>> 
>>> - Jay
>>> 
>>> ----------------------------------------
>>>> From: hosking at cs.purdue.edu
>>>> Date: Mon, 5 Jul 2010 14:31:01 -0400
>>>> To: jkrell at elego.de
>>>> CC: m3commit at elegosoft.com
>>>> Subject: Re: [M3commit] CVS Update: cm3
>>>> 
>>>> Jay, I am perplexed that we are adding things to Modula-3 source because of compiler backend brokenness just to avoid back-end warnings. Better to fix the backend so that RAISE is noreturn. This should not be difficult to do.
>>>> 
>>>> On 5 Jul 2010, at 15:22, Jay Krell wrote:
>>>> 
>>>>> CVSROOT: /usr/cvs
>>>>> Changes by: jkrell at birch. 10/07/05 15:22:28
>>>>> 
>>>>> Modified files:
>>>>> cm3/m3-tools/cvsup/suplib/src/text_cm3/: SupMiscText.m3
>>>>> 
>>>>> Log message:
>>>>> ../src/text_cm3/SupMiscText.m3: In function 'SupMisc__DecodeWS':
>>>>> ../src/text_cm3/SupMiscText.m3:211: warning: 'M3_Bkn9rd_ch' may be used uninitialized in this function
>>>>> ../src/text_cm3/SupMiscText.m3:211: note: 'M3_Bkn9rd_ch' was declared here
>>>>> 
>>>>> because raising an exception isn't currently "noreturn"
>>>>> so initialize it to 0
>>>> 
>>> 
>> 
>