Re: Why do I need to overload =
John Doe wrote:
Victor Bazarov wrote:
John Doe wrote:
I am trying to transform a class with some time consuming operation
by adding a thread. To be able to pass data to thread I have declared
a class ThreadParam as shown below :
[..]
struct ThreadParam
{
ThreadParam(CProvisioning* a_pThis, const CString&
a_strConfig, CString& a_strXmlOut):
pThis(a_pThis),
strConfig( a_strConfig ),
strOut( a_strXmlOut ) {}
CProvisioning* pThis;
const CString& strConfig;
CString& strOut;
};
[...]
The problem I get is with m_thrParam = ThreadParam(this, strConfig,
strXmlOut); because I get :
error C2582: 'operator =' function is unavailable in
'CProvisioning::ThreadParam'
1) First I don't understand why I need to overload =
The compiler cannot generate one because you have reference members.
Once initialised (during construction), a reference cannot be reseated.
2) How can I fix it ?
You need to overload the assignment operator and decide what to do
with the 'strConfig' member (e.g. leave it alone) and the 'strOut'
member. *An example* of your operator= might look like this:
struct ThreadParam
{
...
ThreadParam& operator=(ThreadParam const& other)
{
pThis = other.pThis;
return *this;
}
};
V
The problem is once I run :
m_thrParam = ThreadParam(this, strConfig, strXmlOut);
strConfig is a valid reference but strXmlOut is NULL ...
There is no such thing as a NULL reference. How do you get yours to be
"NULL"? Figure that, fix it, and then everything should be OK.
V
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