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From: "daniel.kruegler at googlemail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/50835] [4.7 Regression] Lvalue-ness of conditional operator results is incorrect in a function template
Date: Sun, 23 Oct 2011 12:24:00 -0000	[thread overview]
Message-ID: <bug-50835-4-lfCz23bU7E@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-50835-4@http.gcc.gnu.org/bugzilla/>

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50835

--- Comment #3 from Daniel Krügler <daniel.kruegler at googlemail dot com> 2011-10-23 12:23:41 UTC ---
Removing as much templates as possible:

//---
struct A {};

struct B
{
    explicit B(A &t) : value(t) {}
    operator A&() const { return value; }
    A& value;
};

void should_be_lvalue(A&)
{
}

template <typename>
void f()
{
    A v;
    should_be_lvalue(true ? B(v) : v);
}
//---

This code is still rejected in either C++03 or C++11 mode:

"error: invalid initialization of non-const reference of type 'A&' from an
rvalue of type 'A'"
"error: in passing argument 1 of 'void should_be_lvalue(A&)'"


  parent reply	other threads:[~2011-10-23 12:24 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-10-23  2:10 [Bug c++/50835] New: " mimomorin at gmail dot com
2011-10-23 11:47 ` [Bug c++/50835] " daniel.kruegler at googlemail dot com
2011-10-23 11:50 ` daniel.kruegler at googlemail dot com
2011-10-23 12:24 ` daniel.kruegler at googlemail dot com [this message]
2011-10-27  9:23 ` rguenth at gcc dot gnu.org
2011-10-27 11:36 ` rguenth at gcc dot gnu.org
2011-11-08 17:14 ` jason at gcc dot gnu.org
2011-11-08 17:31 ` jason at gcc dot gnu.org

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