Error C2451: Illegal conditional expression of type 'UnaryOp<E1, Op>' in ostream - visual studio 9
- by Steven Hill
I am getting a repeated error with VS 9. The code compiles under GNU C++, but I want debug with the VS IDE. Any idea what could be causing this error.
Error 13 error C2451: conditional expression of type 'UnaryOp' is illegal \Microsoft Visual Studio 9.0\VC\include\ostream 512
//unary constraint
template
class UnaryOp : public Constraint {
public:
const E1& e1;
UnaryOp(const E1& _e1);
bool Satisfiable() const;
Bool SatisfiableAux() const;
void Print (std::ostream& os) const;
UnaryOp* clone () const;
//operator bool () const { return true; }
};
template
std::ostream& operator<<(std::ostream& os, const UnaryOp& unop);
UnaryOp code that uses ostream:
template
INLINE void UnaryOp::Print (std::ostream& os) const {
os << *this;
}
template
INLINE std::ostream& operator<<(std::ostream& os, const UnaryOp& unop) {
return os << Op::name << unop.e1;
}
ostream line with error:
_Myt& __CLR_OR_THIS_CALL put(_Elem _Ch)
{ // insert a character
ios_base::iostate _State = ios_base::goodbit;
const sentry _Ok(*this);
512 if (!_Ok)
_State |= ios_base::badbit;
else
{ // state okay, insert character
_TRY_IO_BEGIN
