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From: "sebi707 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/67240] New: [concepts] Implicit conversion constraints are not respected
Date: Sun, 16 Aug 2015 18:09:00 -0000	[thread overview]
Message-ID: <bug-67240-4@http.gcc.gnu.org/bugzilla/> (raw)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67240

            Bug ID: 67240
           Summary: [concepts] Implicit conversion constraints are not
                    respected
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: sebi707 at gmail dot com
  Target Milestone: ---

Using the trailing return type to add constraints does not work in some cases.
The following code should not compile:

int foo(int x)
{
    return x;
}

template <typename T>
concept bool C1 = requires (T x) {
    {foo(x)} -> int&;
};

template <typename T>
concept bool C2 = requires (T x) {
    {foo(x)} -> void;
};

static_assert( C1<int> );
static_assert( C2<int> );

However this compiles just fine with r226884.


             reply	other threads:[~2015-08-16 18:09 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-08-16 18:09 sebi707 at gmail dot com [this message]
2015-08-17  9:20 ` [Bug c++/67240] " redi at gcc dot gnu.org
2015-08-21 18:33 ` jason at gcc dot gnu.org
2015-08-21 18:33 ` jason at gcc dot gnu.org

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