From: Alexandre Oliva <oliva@dcc.unicamp.br>
To: Joe Buck <jbuck@Synopsys.COM>
Cc: espie@quatramaran.ens.fr (Marc Espie), egcs@egcs.cygnus.com
Subject: Re: glossary for egcs - request for contributions
Date: Thu, 29 Apr 1999 00:12:00 -0000 [thread overview]
Message-ID: <or1zh3sxwk.fsf@lua.lbi.dcc.unicamp.br> (raw)
In-Reply-To: <199904290648.XAA11732@atrus.synopsys.com>
On Apr 29, 1999, Joe Buck <jbuck@Synopsys.COM> wrote:
> one may replace a class by a derived class. e.g. I can overload a virtual
^^^^
make that override
> typedef int (*PFDerived)(Derived&);
> int bfunc(Base&);
> PFDerived p = &bfunc;
> this is legal
No way! :-)
You can't touch types of arguments when casting function types. This
mechanism only works for pointers-to-members:
struct Base { void foo(); };
struct Derived : Base {};
typedef void (Derived::*PFDerived)();
PFDerived pD = &Base::foo;
--
Alexandre Oliva http://www.dcc.unicamp.br/~oliva IC-Unicamp, Bra[sz]il
{oliva,Alexandre.Oliva}@dcc.unicamp.br aoliva@{acm.org,computer.org}
oliva@{gnu.org,kaffe.org,{egcs,sourceware}.cygnus.com,samba.org}
*** E-mail about software projects will be forwarded to mailing lists
WARNING: multiple messages have this Message-ID
From: Alexandre Oliva <oliva@dcc.unicamp.br>
To: Joe Buck <jbuck@Synopsys.COM>
Cc: espie@quatramaran.ens.fr (Marc Espie), egcs@egcs.cygnus.com
Subject: Re: glossary for egcs - request for contributions
Date: Fri, 30 Apr 1999 23:15:00 -0000 [thread overview]
Message-ID: <or1zh3sxwk.fsf@lua.lbi.dcc.unicamp.br> (raw)
Message-ID: <19990430231500.pTL0pUr3EeFK4rrpkHGTXygOp5qQnCapApTjll2TwuU@z> (raw)
In-Reply-To: <199904290648.XAA11732@atrus.synopsys.com>
On Apr 29, 1999, Joe Buck <jbuck@Synopsys.COM> wrote:
> one may replace a class by a derived class. e.g. I can overload a virtual
^^^^
make that override
> typedef int (*PFDerived)(Derived&);
> int bfunc(Base&);
> PFDerived p = &bfunc;
> this is legal
No way! :-)
You can't touch types of arguments when casting function types. This
mechanism only works for pointers-to-members:
struct Base { void foo(); };
struct Derived : Base {};
typedef void (Derived::*PFDerived)();
PFDerived pD = &Base::foo;
--
Alexandre Oliva http://www.dcc.unicamp.br/~oliva IC-Unicamp, Bra[sz]il
{oliva,Alexandre.Oliva}@dcc.unicamp.br aoliva@{acm.org,computer.org}
oliva@{gnu.org,kaffe.org,{egcs,sourceware}.cygnus.com,samba.org}
*** E-mail about software projects will be forwarded to mailing lists
next prev parent reply other threads:[~1999-04-29 0:12 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-04-27 15:24 Philipp Thomas
1999-04-27 22:16 ` Jeffrey A Law
1999-04-28 10:01 ` Theodore Papadopoulo
1999-04-30 23:15 ` Theodore Papadopoulo
1999-04-30 23:15 ` Jeffrey A Law
1999-04-27 23:35 ` Martin v. Loewis
1999-04-28 0:08 ` Joe Buck
1999-04-28 9:46 ` Marc Espie
1999-04-28 23:48 ` Joe Buck
1999-04-29 0:12 ` Alexandre Oliva [this message]
1999-04-29 3:26 ` Joe Buck
1999-04-29 3:41 ` Alexandre Oliva
1999-04-30 23:15 ` Alexandre Oliva
1999-04-29 21:44 ` Jason Merrill
1999-04-30 23:15 ` Jason Merrill
1999-04-30 23:15 ` Joe Buck
1999-04-30 23:15 ` Alexandre Oliva
1999-04-29 0:21 ` Jason Merrill
1999-04-30 23:15 ` Jason Merrill
1999-04-30 23:15 ` Joe Buck
1999-04-30 23:15 ` Marc Espie
1999-04-30 23:15 ` Joe Buck
1999-04-30 23:15 ` Martin v. Loewis
1999-04-30 23:15 ` Philipp Thomas
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