[Omnetpp-l] Defining own message

[Solo Zhang <solonilia at xxx>]

Hi, all, i want to define my own application layer message, here is the code:

cplusplus {{
#include <string>
#include "ApplPkt_m.h"
}};

class ApplPkt;

message NewApplPkt extends ApplPkt
{
   fields:
    string fragment;
};

when i compile it, the compiler keeps giving these errors:

NewApplLayer.cc(134) : error C2664: 'NewApplPkt::setFragment' : cannot convert
arameter 1 from 'std::string' to 'const char *'
        No user-defined-conversion operator available that can perform this con
ersion, or the operator cannot be called
NewApplLayer.cc(155) : error C2664: 'NewApplPkt::setFragment' : cannot convert
arameter 1 from 'std::string' to 'const char *'
        No user-defined-conversion operator available that can perform this con
ersion, or the operator cannot be called
NewApplLayer.cc(183) : error C2664: 'int std::basic_string<_Elem,_Traits,_Ax>::
ompare(const std::basic_string<_Elem,_Traits,_Ax> &) const' : cannot convert pa
ameter 1 from 'bool' to 'const std::basic_string<_Elem,_Traits,_Ax> &'
        with
        [
            _Elem=char,
            _Traits=std::char_traits<char>,
            _Ax=std::allocator<char>
        ]
        Reason: cannot convert from 'bool' to 'const std::basic_string<_Elem,_T
aits,_Ax>'
        with
        [
            _Elem=char,
            _Traits=std::char_traits<char>,
            _Ax=std::allocator<char>
        ]
        No constructor could take the source type, or constructor overload reso
ution was ambiguous

please help, thanks a lot!

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