I got this with a recent (843.6n) dmc, but it was ok in about 834/835

Is this a bug, or something wrong in the wxWidgets code  (code based on oleutils.h)

chris


C:\compiler>dmc -mn -c  -g -o+none -Ar -Ae -H -HO- dmc_test.cpp
dmc_test.cpp(9) : Error: reference must refer to same type or be const
Had: int
and: int &
{
^
dmc_test.cpp(18) : Error: '=', ';' or ',' expected
}
^
dmc_test.cpp(20) : Error: identifier or '( declarator )' expected
--- errorlevel 1



dmc_test.cpp:

#define ULONG int

class wxAutoULong
{
public:
    wxAutoULong(ULONG value = 0) : m_Value(value) { }

    operator ULONG&() { return m_Value; }
    ULONG& operator=(ULONG value) { return m_Value = value; }

 private:
    ULONG m_Value;
};

wxAutoULong A, B ;

int main
{
    A=B;
}

"chris elliott" <biol75@york.ac.uk> wrote in message news:d7kk7t$1uld$1@digitaldaemon.com...
>      ULONG& operator=(ULONG value) { return m_Value = value; }

This is the problem line, it tries to convert:
    return m_Value=value;
into a reference. But it isn't a reference, it's an assignment expression.
Rewrite as:
    m_Value = value;
    return m_Value;

thank you for the clear explanation
chris

Walter wrote:
> "chris elliott" <biol75@york.ac.uk> wrote in message
> news:d7kk7t$1uld$1@digitaldaemon.com...
> 
>>     ULONG& operator=(ULONG value) { return m_Value = value; }
> 
> 
> This is the problem line, it tries to convert:
>     return m_Value=value;
> into a reference. But it isn't a reference, it's an assignment expression.
> Rewrite as:
>     m_Value = value;
>     return m_Value;
> 
> 

"Walter" <newshound@digitalmars.com> wrote in message news:d7lfbj$2nmg$1@digitaldaemon.com...
>
> "chris elliott" <biol75@york.ac.uk> wrote in message news:d7kk7t$1uld$1@digitaldaemon.com...
> >      ULONG& operator=(ULONG value) { return m_Value = value; }
>
> This is the problem line, it tries to convert:
>     return m_Value=value;
> into a reference. But it isn't a reference, it's an assignment expression.
> Rewrite as:
>     m_Value = value;
>     return m_Value;

I forgot to mention, the reason it "worked" before was the compiler rewrote
the code as:
    tmp = (m_Value = value);
    return tmp;
This is no longer in conformance with the C++ Standard, so was removed.

Walter wrote:
> "Walter" <newshound@digitalmars.com> wrote in message
> news:d7lfbj$2nmg$1@digitaldaemon.com...
> 
>>"chris elliott" <biol75@york.ac.uk> wrote in message
>>news:d7kk7t$1uld$1@digitaldaemon.com...
>>
>>>     ULONG& operator=(ULONG value) { return m_Value = value; }
>>
>>This is the problem line, it tries to convert:
>>    return m_Value=value;
>>into a reference. But it isn't a reference, it's an assignment expression.
>>Rewrite as:
>>    m_Value = value;
>>    return m_Value;
> 
> 
> I forgot to mention, the reason it "worked" before was the compiler rewrote
> the code as:
>     tmp = (m_Value = value);
>     return tmp;
> This is no longer in conformance with the C++ Standard, so was removed.
> 
> 
thanks, the code also "works" with VC, Borland, watcom compilers (and I guess gcc)

chris

chris elliott wrote:
> 
> 
I forgot to say, how good it is to have dm spot such code bugs !Thanks again for all the rapid support
>>
> thanks, the code also "works" with VC, Borland, watcom compilers (and I guess gcc)
> 
> chris