tree 5645fb589824a15614407817578601749c2839ca
parent 9c5acce674e3ec1ba08509123ff519f106cc4348
author Sameer Agarwal <sameeragarwal@google.com> 1358278450 -0800
committer Sameer Agarwal <sameeragarwal@google.com> 1358543191 -0800

Change NumericDiffCostFunction to accept variadic functors.

The interface for NumericDiffCostFunction and AutoDiffCostFunction
are not comparable. They both accept variadic functors.

The change is backward compatible, as it still supports numeric
differentiation of CostFunction objects.

Some refactoring of documentation and code in auto_diff_cost_function
and its relatives was also done to make things consistent.

Change-Id: Ib5f230a1d4a85738eb187803b9c1cd7166bb3b92