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From: "marcin.slusarz at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/67764] -Wconversion generates false warnings for bitmask+cast expressions
Date: Wed, 30 Sep 2015 08:41:00 -0000	[thread overview]
Message-ID: <bug-67764-4-H68q5oKkkr@http.gcc.gnu.org/bugzilla/> (raw)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67764

--- Comment #2 from Marcin Ślusarz <marcin.slusarz at intel dot com> ---
That's still gcc bug.
>From gcc-bugs-return-498379-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 30 08:58:07 2015
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/67777] unsigned wchar_t and signed wchar_t should cause compiler errors but do not.
Date: Wed, 30 Sep 2015 08:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67777

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is a GNU extension, use -Wpedantic or -Werror=pedantic to get a
diagnostic.

The diagnostic is not enormously helpful though:

w.cc:1:17: warning: long, short, signed or unsigned used invalidly for
‘parameter’ [-Wpedantic]
>From gcc-bugs-return-498380-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 30 09:00:57 2015
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/67777] unsigned wchar_t and signed wchar_t should cause compiler errors but do not.
Date: Wed, 30 Sep 2015 09:00:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idg777

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Trevor Hickey from comment #0)
> Why can we add signed/unsigned qualifiers to wchar_t?

It produces a type of the same size but with the opposite signedness, like
std::make_signed/std::make_unsigned.


  parent reply	other threads:[~2015-09-30  8:41 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-09-29 13:21 [Bug c/67764] New: " marcin.slusarz at intel dot com
2015-09-29 19:57 ` [Bug c/67764] " egall at gwmail dot gwu.edu
2015-09-30  8:41 ` marcin.slusarz at intel dot com [this message]
2015-10-01  4:07 ` egall at gwmail dot gwu.edu

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