A bunch of clang-tidy fixes. Change-Id: I1442d69eb9be91a8c368187848d65196273e3de6
Ceres Solver is an open source C++ library for modeling and solving large, complicated optimization problems. It is a feature rich, mature and performant library which has been used in production at Google since 2010. Ceres Solver can solve two kinds of problems.
Please see ceres-solver.org for more information.