Qt-interest Archive, July 2007
are templated interfaces possible ?
Message 1 in thread
I'm trying to implement some transparent/alternative matrix multiplication
routines, and I figured the simplest way to do this would be via the Qt
plugin/interface mechanism. However I keep getting strange errors and at this
point I'm not sure whether I'm missing something or simply the plugin macros
are not template-proof. What I have for the interface now is roughly
template <typename R, typename C>
class MatrixInterface
{
public:
virtual ~MatrixInterface() {};
enum density { sparse, dense };
enum major { column, row };
enum matrixop { add, sub };
virtual bool has(matrixop op) const = 0;
};
Q_DECLARE_INTERFACE(MatrixInterface,
"com.MathForFun.QtMath.MatrixInterface/1.0")
and this gives "error: expected initializer before '*' token" on the
Q_DECLARE_INTERFACE line (works fine without the template line). Apparently
bc of the macro I cant say MatrixInterface<R,C> as it would split it at the
comma. Tried looking at the DECLARE_INTERFACE, but it's pretty scary looking
code for anyone without very deep qt knowledge. Any suggestions, links,
readings/code or am I simply in too deep water here ?
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