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From: "tsoae at mail dot ru" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/54521] New: g++ fails to call explicit constructors in the second step of copy initialization
Date: Fri, 07 Sep 2012 20:38:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54521

             Bug #: 54521
           Summary: g++ fails to call explicit constructors in the second
                    step of copy initialization
    Classification: Unclassified
           Product: gcc
           Version: 4.7.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: tsoae@mail.ru


g++ fails to compile the following code

    struct X
    {
        X(int) {}
        explicit X(X const &) {}
    };

    int main()
    {
        X x = 1; // error: no matching function for call to 'X::X(X)'
    }

The second step of a copy initialization (see 8.5/16/6/2) is a
direct-initialization where explicit constructors shall be considered as
candidate functions.