[Bug c/18814] Incorrect reinitialization of compound literal

["austern at apple dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From austern at apple dot com  2004-12-03 19:27 -------
Subject: Re:  Incorrect reinitialization of compound literal

On Dec 3, 2004, at 11:15 AM, pinskia at gcc dot gnu dot org wrote:

>
> ------- Additional Comments From pinskia at gcc dot gnu dot org  
> 2004-12-03 19:15 -------
> (In reply to comment #4)
>> Subject: Re:  Incorrect reinitialization of compound literal
>>
>> On Dec 3, 2004, at 10:50 AM, pinskia at gcc dot gnu dot org wrote:
>>
>>>
>>> ------- Additional Comments From pinskia at gcc dot gnu dot org
>>> 2004-12-03 18:50 -------
>>> But reading 6.5.2.5 P 16 seems to say something different.
>>>
>>> What it seems to say is:
>>>   p = &((int) {1});
>>> is to set the int to be one and then take the address.  We still 
>>> point
>>> to the same int as before.
>>
>> Not exactly.  We still point to the same (one-element) array of ints 
>> we
>> did before.  The array is modifiable, and we're changing the value of
>> the first element in the array.  You might think that we should be
>> reinitializing the object, but that's wrong.  When we execute that
>> statement a second time all we're doing is setting p to the address of
>> the compound literal again, but we have change the value of that
>> compound literal.
>
> But it is not clear to me at least we should reinitialize the literal, 
> because the example which I gave
> shows it should but you say it should not.

The example you gave isn't relevant.  It says that we don't create a 
new object.  It says nothing about modifying the original literal, 
which is what we're doing.



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18814