Eigen, the linear algebra library written in C++, uses a clever technique: template parameters (for example the dimensions of a matrix) that are not known at compile time can take the special value Dynamic, which means that run-time values will be expected. See here: https://eigen.tuxfamily.org/dox/group__TutorialMatrixClass.html#title2 How standard is this technique in C++? Did the Eigen team come up with it or borrow the idea from another project? I'm working on a C++ solver for nonconvex optimization and I'm thinking about borrowing it. Thanks, Charlie
C++ templates: choice between static and dynamic allocations (a la Eigen)
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