From: Andy <borucki.andrzej@gmail.com>
To: gcc-help@gcc.gnu.org
Subject: How to explain this syntax?
Date: Sun, 16 Apr 2023 12:25:28 +0200 [thread overview]
Message-ID: <CAE2KeA+4w8bF=3jxmL56osyqQNFaetRY=q9_UEKrkM69frNAww@mail.gmail.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 700 bytes --]
In gcc/gcc/testsuite/gcc.c-torture/compile/pr43635.c
we have
extern void d (void);
void (*foo (void)) (float)
{
void (*(*x) (void)) (float) = d;
return (*x) ();
}
d is a function without parameters and nothing returns.
foo is function without parameters and returns pointer to function with one
parameter float and also returning void?
what is type of x?
void (*(*x) (void)) (float) is on whole type definition of x or part is
type definition of x and part is cast d to x? which parts?
why not returns x but (*x) ()? don' t return pointer to function but call
this function?
I know, this is malignant example, in in real world can't be cast function
returning void to function returning value
next reply other threads:[~2023-04-16 10:25 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-16 10:25 Andy [this message]
2023-04-16 10:53 ` Andrew Haley
2023-04-19 11:40 ` Andy
2023-04-19 11:53 ` Xi Ruoyao
2023-04-19 12:35 ` Andy
2023-04-19 12:41 ` Xi Ruoyao
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='CAE2KeA+4w8bF=3jxmL56osyqQNFaetRY=q9_UEKrkM69frNAww@mail.gmail.com' \
--to=borucki.andrzej@gmail.com \
--cc=gcc-help@gcc.gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).