| Re: [eigen] Interesting C++ standard proposal |
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On 12.11.2013 13:25, Gael Guennebaud wrote:
a few examples to illustrate what I meant by "guessing":
auto a = A.block(...);
does the user want a copy of the submatrix or a lightweight view?
Yes, that is one of the important ambiguities. Especially, since this
not only influences performance, but also what happens if A is changed
after this assignment. (I've had my share of trouble with opencv's
memory sharing ...)
Actually, an even more trivial example would be this:
auto B = A; // is B a reference or a copy?
But for the foreseeable future this discussion is mostly hypothetical,
anyways -- at least regarding Eigen.
We could/should however make some C++11 related FAQ entries.
Christoph
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Dipl.-Inf., Dipl.-Math. Christoph Hertzberg
Cartesium 0.049
Universität Bremen
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