I'm new to C++ but I think because you can convert the int to a
double, both functions could be called.
My strongest recommendation is don't listen to me -- go do some
google searchs. "C++ multiple inheritance ambiguity"
Microsoft has a page that almost applies.
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/
vclib/html/_mfcnotes_tn016.asp
But, in effect, declare f inside the class M. You can overload it to
call C1::f for double and C2::f for int.
HTH
pedz
On Jan 18, 2006, at 7:51 PM, Rich Johnson wrote:
Hi folks--
Compiling the following (with no options) produces an ambiguity error:
>>file: bug.cpp >>>>>>>>>
struct C1 { void f( double ){}; };
struct C2 { void f( int ){}; };
class M : public C1, public C2 {};
int main()
{
double c1;
M m;
m.f(c1);
}
<<<<<<<<<<<<<<<<<
The specific error report is:
$ g++ bug.cpp -o bug
bug.cpp: In function `int main()':
bug.cpp:11: error: request for member `f' is ambiguous
bug.cpp:2: error: candidates are: void C2::f(int)
bug.cpp:1: error: void C1::f(double)
I've tried both g++(4.0.0 20041026) on Mac OS X 10.4.4, g++(4.0.3
20051201) on debian(powerpc) unstable. and g++-3.3.6 (Debian
1:3.3.6-10). All three report the same error.
Is the code proper C++? If not, what am I missing?
Given that there's there's only one method with a ''void f(double)"
signature where's the source of the ambiguity?
Thnx
--rich
