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From: "g++bug at oxyware dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/56868] New: Constexpr example in 7.1.5/5 fails to compile correctly
Date: Sun, 07 Apr 2013 18:36:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56868

             Bug #: 56868
           Summary: Constexpr example in 7.1.5/5 fails to compile
                    correctly
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: g++bug@oxyware.com


// The following example from 7.1.5/5 fails the static assert for g3(0)

constexpr int f(void *) { return 0; }
constexpr int f(...) { return 1; }
constexpr int g1() { return f(0); }
constexpr int g2(int n) { return f(n); }
constexpr int g3(int n) { return f(n*0); }

int main()
{
    static_assert(g1() == 0, "g1 failed");
    static_assert(g2(0) == 1, "g2 failed");
    static_assert(g3(0) == 1, "g3 failed");  // fails, g3(0) returns 0 not 1
}