On 8/26/2011 10:25 AM, Mathias Gaunard wrote:
> With the following Proto expression:
> m * v;
> with m in the matrix_domain and v in the vector_domain.
> vector_domain is a sub-domain of matrix_domain, so the common domain is
> We want the '*' operation to model the matrix multiplication.
> matrix times vector yields a vector.
> Therefore, the result of m * v should be in the vector_domain.
> If we define operator* ourselves, then we can easily put the domain we
> want when calling proto::make_expr.
> However, using Proto-provided operator overloads, this doesn't appear to
> be possible.
> Is there a mechanism in Proto to define how the domain of a node new
> should be computed depending on the tag and the domains of the children?
Before I answer, can you tell me why you've decided to put vector and
matrix operations into separate domains? This seems like an artificial
and unnecessary separation to me.
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