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["Timothy Fanelli" <tfanelli@xxxxxxxxxxxx>]

Suriya,

The error you are seeing is that there is no overloaded stream-insertion 
operator for your user-defined data type: packet_type. To use a user-defined 
data type as the template parameter for an sc_signal, you must overload this 
stream insertion operator, like so:

public ostream& operator << ( ostream& out, const packet_type& packet ) 
{
    // Do something here, like write out the members of the packet variable to 
the ostream "out".
}

Once you have done that, you can then pass variables of type packet_type to 
output streams, such as "cout". 

You must also implement the sc_trace method to handle packet_type variables as 
well, as follows:

void sc_trace( sc_trace_file* tf, const packet_type& packet, const std::string& 
name )
{
   // Do something here, like write out the members of the packet variable to 
the trace file "tf"
}

It may also be helpful, then, to declare these two methods as friends of your 
packet_type class, though this isn't strictly necessary.

Hope that helps!
Thanks,

Timothy C. Fanelli

Instructor, PhD Student
Software Engineering
Department of Electrical and Computer Engineering
Clarkson University, Potsdam, NY 13699


On Dec 13, 2009, at 11:55 PM, Suriya Prakash J wrote:

Hi all,

I was trying to simulate an transmission-reception module. I have faced a error 
as provided below: 

/home/suriya/SystemC/systemc-2.2.0/include/sysc/communication/sc_signal.h:242: 
error: no match for ?operator<<? in ?std::operator<< [with _Traits = 
std::char_traits<char>](((std::basic_ostream<char, std::char_traits<char> 
>&)((std::basic_ostream<char, std::char_traits<char> >*)os)), ((const 
char*)"new value = ")) << ((const 
sc_core::sc_signal<packet_type>*)this)->sc_core::sc_signal<packet_type>::m_new_val?

:: packet_type is a user defined data type created and provided as a sc_signal 
to the module.
What modifications shall I make? 

Pass on any ideas you might have :-)


Suriya