Re: Template multiple inheritance Organization: Roundhouse Consulting, Ltd.

Pete Becker <>
Tue, 17 May 2011 18:48:50 CST
On 2011-05-17 12:46:37 -0400, dec4106 said:

I can't figure out how to differentiate between the PortProvider
interfaces. Here's sort of what I want to do:
template <typename T>
struct Provider
   virtual ~Provider() {}
   virtual T getValue() const = 0;
template <typename T, int port>
struct PortProvider : public Provider<T>
   virtual ~PortProvider() {}
   virtual T getValue() const { return getPortValue(); }
   virtual T getPortValue() const = 0;
class ConcreteProvider : public PortProvider<double, 1>, public
PortProvider<int, 2>
   virtual double getPortValue(); // return value for port 1
   virtual int getPortValue(); // return value for port 2
Is there a notation that distinguishes the two templates? Thanks.

Sure. Do the same thing you'd do if you had two non-template bases.

Roundhouse Consulting, Ltd. ( Author of "The Standard C++ Library Extensions: a Tutorial and Reference (

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