From: Alexandre Oliva <oliva@dcc.unicamp.br>
To: Joerg Pommnitz <pommnitz@darmstadt.gmd.de>
Cc: Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>,
egcs@cygnus.com, egcs-bugs@cygnus.com
Subject: Re: signal 11 generating problem, was: Further observations regarding alloca on i586-pc-linux-gnu
Date: Tue, 25 Aug 1998 19:31:00 -0000 [thread overview]
Message-ID: <oraf4sq5yo.fsf@iguacu.dcc.unicamp.br> (raw)
In-Reply-To: <35E29107.72AB8560@darmstadt.gmd.de>
Joerg Pommnitz <pommnitz@darmstadt.gmd.de> writes:
> Martin von Loewis wrote:
>> I'd say auto_ptrs are there for you, no? Somebody correct me, but it
>> seems that
>>
>> void f(char * = std::auto_ptr<char*>(new char[20]));
>> is valid C++, and gives you memory that will live slightly longer than
>> the call to f, and will then be automatically deallocated.
Yup, it's syntactically valid C++, but it is wrong because auto_ptr
will delete the pointer to the array as if it were a pointer to a
single object. You should write auto_ptr_array instead.
> Returning an auto_ptr is not really an option. According to Stroustrup,
> "The C++ Programming Language" 3rd Edition page 368, auto_ptr does not
> contain a cast operator to its element type.
But it provides a get() method, that you could use to obtain the
pointer to the contained object.
--
Alexandre Oliva
mailto:oliva@dcc.unicamp.br mailto:aoliva@acm.org
http://www.dcc.unicamp.br/~oliva
Universidade Estadual de Campinas, SP, Brasil
next prev parent reply other threads:[~1998-08-25 19:31 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-08-20 9:09 Joerg Pommnitz
1998-08-21 8:17 ` Noel Yap
1998-08-21 16:30 ` Alexandre Oliva
1998-08-22 11:00 ` Carlo Wood
1998-08-23 4:36 ` Richard Henderson
1998-08-23 12:13 ` Martin von Loewis
1998-08-23 18:49 ` Richard Henderson
1998-08-25 19:31 ` Martin von Loewis
1998-08-24 4:37 ` Jeffrey A Law
1998-08-25 7:28 ` Martin von Loewis
1998-08-24 10:48 ` Joerg Pommnitz
1998-08-25 12:45 ` Martin von Loewis
1998-08-25 19:31 ` Joerg Pommnitz
1998-08-25 19:31 ` Martin von Loewis
1998-08-25 23:05 ` signal 11 generating problem, was: " Joerg Pommnitz
1998-08-25 19:31 ` Alexandre Oliva [this message]
1998-08-25 19:31 ` Joerg Pommnitz
1998-08-25 23:05 ` Martin von Loewis
1998-08-26 8:25 ` Joe Buck
1998-08-26 5:20 ` Noel Yap
1998-08-26 11:57 ` Joe Buck
1998-08-26 3:53 ` Andreas Schwab
1998-08-26 12:26 ` Oleg Zabluda
1998-08-27 13:38 ` Alexandre Oliva
1998-08-25 19:31 ` Richard Henderson
1998-08-26 5:20 signal 11 generating problem, was: " Sol Foster
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