Not sure if this is covered by Christof's comprehensive coverage, but here is just in case


struct S
{
// Construction
public:
    S(int i)
        : m_i(i)
    {}

// Conversion
public:
    template <class T>
    operator T () const
    {
        return (T)m_i;
    }

// Members
protected:
    int     m_i;
};

void fn(int )
{}

int main(int, char**)
{
    S   s(100);

    fn(s);

    return 0;
}

The 8.32.12b gives

H:\Dev\Test\compiler\dm\null_v_bug>dmc optbug.cpp
optbug.cpp(15) : Error: 'S::operator int' is already defined
        fn(s);
             ^
optbug.cpp(41) : Error: need explicit cast for function parameter 1 to get
from: S
to  : int
--- errorlevel 1

If I changes the fn call to

    fn((int)s);

then it works, but that kind-of defeats the purpose. ;)

Matthew

Walter

Any ETA with this one ... :)

Matthew

"Matthew Wilson" <dmd@synesis.com.au> wrote in message news:atlkke$2d99$1@digitaldaemon.com...
> Not sure if this is covered by Christof's comprehensive coverage, but here is just in case
>
>
> struct S
> {
> // Construction
> public:
>     S(int i)
>         : m_i(i)
>     {}
>
> // Conversion
> public:
>     template <class T>
>     operator T () const
>     {
>         return (T)m_i;
>     }
>
> // Members
> protected:
>     int     m_i;
> };
>
> void fn(int )
> {}
>
> int main(int, char**)
> {
>     S   s(100);
>
>     fn(s);
>
>     return 0;
> }
>
> The 8.32.12b gives
>
> H:\Dev\Test\compiler\dm\null_v_bug>dmc optbug.cpp
> optbug.cpp(15) : Error: 'S::operator int' is already defined
>         fn(s);
>              ^
> optbug.cpp(41) : Error: need explicit cast for function parameter 1 to get
> from: S
> to  : int
> --- errorlevel 1
>
> If I changes the fn call to
>
>     fn((int)s);
>
> then it works, but that kind-of defeats the purpose. ;)
>
> Matthew
>
>

Orsen Welles comes to mind <g>.

"Matthew Wilson" <dmd@synesis.com.au> wrote in message news:atoi7h$1hmn$1@digitaldaemon.com...
> Walter
>
> Any ETA with this one ... :)
>
> Matthew
>
> "Matthew Wilson" <dmd@synesis.com.au> wrote in message news:atlkke$2d99$1@digitaldaemon.com...
> > Not sure if this is covered by Christof's comprehensive coverage, but
here
> > is just in case
> >
> >
> > struct S
> > {
> > // Construction
> > public:
> >     S(int i)
> >         : m_i(i)
> >     {}
> >
> > // Conversion
> > public:
> >     template <class T>
> >     operator T () const
> >     {
> >         return (T)m_i;
> >     }
> >
> > // Members
> > protected:
> >     int     m_i;
> > };
> >
> > void fn(int )
> > {}
> >
> > int main(int, char**)
> > {
> >     S   s(100);
> >
> >     fn(s);
> >
> >     return 0;
> > }
> >
> > The 8.32.12b gives
> >
> > H:\Dev\Test\compiler\dm\null_v_bug>dmc optbug.cpp
> > optbug.cpp(15) : Error: 'S::operator int' is already defined
> >         fn(s);
> >              ^
> > optbug.cpp(41) : Error: need explicit cast for function parameter 1 to
get
> > from: S
> > to  : int
> > --- errorlevel 1
> >
> > If I changes the fn call to
> >
> >     fn((int)s);
> >
> > then it works, but that kind-of defeats the purpose. ;)
> >
> > Matthew
> >
> >
>
>

You've completely lost me, Walter. Either you're more inscrutable than I can handle, or I've been so much documentation that my brain has turned to sandstone.

"Walter" <walter@digitalmars.com> wrote in message news:atoj5d$1i8t$1@digitaldaemon.com...
> Orsen Welles comes to mind <g>.
>
> "Matthew Wilson" <dmd@synesis.com.au> wrote in message news:atoi7h$1hmn$1@digitaldaemon.com...
> > Walter
> >
> > Any ETA with this one ... :)
> >
> > Matthew
> >
> > "Matthew Wilson" <dmd@synesis.com.au> wrote in message news:atlkke$2d99$1@digitaldaemon.com...
> > > Not sure if this is covered by Christof's comprehensive coverage, but
> here
> > > is just in case
> > >
> > >
> > > struct S
> > > {
> > > // Construction
> > > public:
> > >     S(int i)
> > >         : m_i(i)
> > >     {}
> > >
> > > // Conversion
> > > public:
> > >     template <class T>
> > >     operator T () const
> > >     {
> > >         return (T)m_i;
> > >     }
> > >
> > > // Members
> > > protected:
> > >     int     m_i;
> > > };
> > >
> > > void fn(int )
> > > {}
> > >
> > > int main(int, char**)
> > > {
> > >     S   s(100);
> > >
> > >     fn(s);
> > >
> > >     return 0;
> > > }
> > >
> > > The 8.32.12b gives
> > >
> > > H:\Dev\Test\compiler\dm\null_v_bug>dmc optbug.cpp
> > > optbug.cpp(15) : Error: 'S::operator int' is already defined
> > >         fn(s);
> > >              ^
> > > optbug.cpp(41) : Error: need explicit cast for function parameter 1 to
> get
> > > from: S
> > > to  : int
> > > --- errorlevel 1
> > >
> > > If I changes the fn call to
> > >
> > >     fn((int)s);
> > >
> > > then it works, but that kind-of defeats the purpose. ;)
> > >
> > > Matthew
> > >
> > >
> >
> >
>
>

Orsen Welles selling Gallo wine: "We will sell no wine before its time." Often parodied at the time, but I suppose it's been too many years <g>.

"Matthew Wilson" <dmd@synesis.com.au> wrote in message news:atone6$1l4v$1@digitaldaemon.com...
> You've completely lost me, Walter. Either you're more inscrutable than I
can
> handle, or I've been so much documentation that my brain has turned to sandstone.
>
> "Walter" <walter@digitalmars.com> wrote in message news:atoj5d$1i8t$1@digitaldaemon.com...
> > Orsen Welles comes to mind <g>.
> >
> > "Matthew Wilson" <dmd@synesis.com.au> wrote in message news:atoi7h$1hmn$1@digitaldaemon.com...
> > > Walter
> > >
> > > Any ETA with this one ... :)
> > >
> > > Matthew
> > >
> > > "Matthew Wilson" <dmd@synesis.com.au> wrote in message news:atlkke$2d99$1@digitaldaemon.com...
> > > > Not sure if this is covered by Christof's comprehensive coverage,
but
> > here
> > > > is just in case
> > > >
> > > >
> > > > struct S
> > > > {
> > > > // Construction
> > > > public:
> > > >     S(int i)
> > > >         : m_i(i)
> > > >     {}
> > > >
> > > > // Conversion
> > > > public:
> > > >     template <class T>
> > > >     operator T () const
> > > >     {
> > > >         return (T)m_i;
> > > >     }
> > > >
> > > > // Members
> > > > protected:
> > > >     int     m_i;
> > > > };
> > > >
> > > > void fn(int )
> > > > {}
> > > >
> > > > int main(int, char**)
> > > > {
> > > >     S   s(100);
> > > >
> > > >     fn(s);
> > > >
> > > >     return 0;
> > > > }
> > > >
> > > > The 8.32.12b gives
> > > >
> > > > H:\Dev\Test\compiler\dm\null_v_bug>dmc optbug.cpp
> > > > optbug.cpp(15) : Error: 'S::operator int' is already defined
> > > >         fn(s);
> > > >              ^
> > > > optbug.cpp(41) : Error: need explicit cast for function parameter 1
to
> > get
> > > > from: S
> > > > to  : int
> > > > --- errorlevel 1
> > > >
> > > > If I changes the fn call to
> > > >
> > > >     fn((int)s);
> > > >
> > > > then it works, but that kind-of defeats the purpose. ;)
> > > >
> > > > Matthew
> > > >
> > > >
> > >
> > >
> >
> >
>
>

No worries. I have a little patience on this matter ... :)



"Walter" <walter@digitalmars.com> wrote in message news:atp3so$1tlk$1@digitaldaemon.com...
> Orsen Welles selling Gallo wine: "We will sell no wine before its time." Often parodied at the time, but I suppose it's been too many years <g>.
>
> "Matthew Wilson" <dmd@synesis.com.au> wrote in message news:atone6$1l4v$1@digitaldaemon.com...
> > You've completely lost me, Walter. Either you're more inscrutable than I
> can
> > handle, or I've been so much documentation that my brain has turned to sandstone.
> >
> > "Walter" <walter@digitalmars.com> wrote in message news:atoj5d$1i8t$1@digitaldaemon.com...
> > > Orsen Welles comes to mind <g>.
> > >
> > > "Matthew Wilson" <dmd@synesis.com.au> wrote in message news:atoi7h$1hmn$1@digitaldaemon.com...
> > > > Walter
> > > >
> > > > Any ETA with this one ... :)
> > > >
> > > > Matthew
> > > >
> > > > "Matthew Wilson" <dmd@synesis.com.au> wrote in message news:atlkke$2d99$1@digitaldaemon.com...
> > > > > Not sure if this is covered by Christof's comprehensive coverage,
> but
> > > here
> > > > > is just in case
> > > > >
> > > > >
> > > > > struct S
> > > > > {
> > > > > // Construction
> > > > > public:
> > > > >     S(int i)
> > > > >         : m_i(i)
> > > > >     {}
> > > > >
> > > > > // Conversion
> > > > > public:
> > > > >     template <class T>
> > > > >     operator T () const
> > > > >     {
> > > > >         return (T)m_i;
> > > > >     }
> > > > >
> > > > > // Members
> > > > > protected:
> > > > >     int     m_i;
> > > > > };
> > > > >
> > > > > void fn(int )
> > > > > {}
> > > > >
> > > > > int main(int, char**)
> > > > > {
> > > > >     S   s(100);
> > > > >
> > > > >     fn(s);
> > > > >
> > > > >     return 0;
> > > > > }
> > > > >
> > > > > The 8.32.12b gives
> > > > >
> > > > > H:\Dev\Test\compiler\dm\null_v_bug>dmc optbug.cpp
> > > > > optbug.cpp(15) : Error: 'S::operator int' is already defined
> > > > >         fn(s);
> > > > >              ^
> > > > > optbug.cpp(41) : Error: need explicit cast for function parameter
1
> to
> > > get
> > > > > from: S
> > > > > to  : int
> > > > > --- errorlevel 1
> > > > >
> > > > > If I changes the fn call to
> > > > >
> > > > >     fn((int)s);
> > > > >
> > > > > then it works, but that kind-of defeats the purpose. ;)
> > > > >
> > > > > Matthew
> > > > >
> > > > >
> > > >
> > > >
> > >
> > >
> >
> >
>
>

In any case, I fixed it and it'll go out in the next update. -Walter

"Matthew Wilson" <dmd@synesis.com.au> wrote in message news:atpcqb$2513$1@digitaldaemon.com...
> No worries. I have a little patience on this matter ... :)

Excellent stuff! (As usual)

We again doff our collective cap to the esteemed compiler walter. :)

"Walter" <walter@digitalmars.com> wrote in message news:atpj7q$29rm$1@digitaldaemon.com...
> In any case, I fixed it and it'll go out in the next update. -Walter
>
> "Matthew Wilson" <dmd@synesis.com.au> wrote in message news:atpcqb$2513$1@digitaldaemon.com...
> > No worries. I have a little patience on this matter ... :)
>
>
>