tree 07b0d836a71f7b779e70fe94727ecf2b8dcf3084
parent 92d6541c77ba9d60d9a69814298f16202a3c0e59
author Julian Kent <jkflying@gmail.com> 1583315424 +0100
committer Julian Kent <jkflying@gmail.com> 1583580196 +0100

Fix 3+ nested Jet constructor

In Jet types, there is an attempt to set the derivative to 0.
However, if the derivative is not directly a scalar but a Jet<Jet>,
this cannot be constructed directly from a 0 literal. This is solved
by using the default constructor for the scalar type instead of 0.

The typical use case for this is adding constraints to the second
derivative of a curve in an Autodiff cost function.

Change-Id: Id480096632a731f312be12e294b3d6e244211529