#include <iostream>
 
struct CPUDevice;
struct GPUDevice;
 
template <typename Device, typename T>
class AddBOp {
public:
	void Compute() {
		std::cout << "Within AddBOp<Device, T>\n";
	}
};
 
template <typename T>
class AddBOp<GPUDevice, T> {
public:
	void Compute() {
		std::cout << "Within AddBOp<GPUDevice, T>\n";
	}
};
 
int main() {
	{
		AddBOp<CPUDevice, double> op;
		op.Compute();
	}
	{
		AddBOp<GPUDevice, double> op;
		op.Compute();
	}
	return 0;
}

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