[LLVMbugs] [Bug 14488] New: Wrong private constructor selected during compilation

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=14488

             Bug #: 14488
           Summary: Wrong private constructor selected during compilation
           Product: clang
           Version: trunk
          Platform: Macintosh
        OS/Version: MacOS X
            Status: NEW
          Severity: release blocker
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: dummymail000 at gmail.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified


The following code using construction with = sign also has problems (valid
C++98):



#include <iostream>

struct QBasicAtomicInteger
{
    QBasicAtomicInteger(int value)
    {
        std::cout << "This is a constructor from int" << std::endl;
    }

private:
    QBasicAtomicInteger(const QBasicAtomicInteger &)
    {
        std::cout << "This is a copy constructor" << std::endl;
    }
};

struct QMetaTypeIdQObject
{
    static int qt_metatype_id()
    {
        static QBasicAtomicInteger metatype_id = 0;
        return 0;
    }
}; 

int main()
{
    QMetaTypeIdQObject::qt_metatype_id();

    return 0;
}



error: calling a private constructor of class 'QBasicAtomicInteger'

Using a non-assignment constructor doesn't raise the issue. If the
copy-constructor is turned public, what is executed in the end is the int
constructor anyway.

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