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c++ - Is this a bug or this the code wrong?

reply =?ISO-8859-1?Q?=22Sz=2E_Horv=E1t=22?= writes:
I tried to compile a program, which I normally use with gcc, using dmc. 
It compiles with gcc, but dmc gives a strange error message.

Here is a reduced test case:

template<typename T> class arr { T x; };

template<void (*D)(const arr<double>)> class ode { };

void fun(const arr<double>) { }

int main() {
	ode<fun> odeInst;
	return 0;
}

Is the code wrong or is this a bug in dmc? The error message is:

         ode<fun> odeInst;
                ^
sim.cpp(9) : Error: need explicit cast to convert
from: void (*C func)(const arr<double >)
to  : void (*C func)(const arr<double >)
--- errorlevel 1

If I remove the const or change arr<double> to double *, the error 
message disappears.

Thanks for your help in advance,
Szabolcs
Apr 20 2007
next sibling parent reply =?ISO-8859-1?Q?=22Sz=2E_Horv=E1t=22?= writes:
I forgot to mention that this problem exists with both dmc 8.49 and the 
8.50 beta.
Apr 20 2007
parent =?ISO-8859-1?Q?=22Sz=2E_Horv=E1t=22?= writes:
Anyone?
Apr 22 2007
prev sibling parent Bertel Brander <bertel post4.tele.dk> writes:
Sz. Horvát skrev:

 
 I tried to compile a program, which I normally use with gcc, using dmc. 
 It compiles with gcc, but dmc gives a strange error message.
 
 Here is a reduced test case:
 
 template<typename T> class arr { T x; };
 
 template<void (*D)(const arr<double>)> class ode { };
 
 void fun(const arr<double>) { }
 
 int main() {
     ode<fun> odeInst;
     return 0;
 }
 
 Is the code wrong or is this a bug in dmc? The error message is:
 
         ode<fun> odeInst;
                ^
 sim.cpp(9) : Error: need explicit cast to convert
 from: void (*C func)(const arr<double >)
 to  : void (*C func)(const arr<double >)



I think it's a bug in the compiler, your code seems fine.

Alone the message (convert A to A) indicates that the compiler
is in a mess.

-- 
Just another homepage:
http://damb.dk
But it's mine - Bertel
Apr 22 2007