tree f8b50ba668eb2184ebf56280c24d3c6604fbf13a
parent 54ba6c27b504f43b59b0d91da0165995c66d9a3d
author Sameer Agarwal <sameeragarwal@google.com> 1556407570 -0700
committer Sameer Agarwal <sameeragarwal@google.com> 1556556393 -0700

Add Problem::EvaluateResidualBlock.

This method gives the user the ability to evaluate a given residual
block.

A couple of minor cleanups.

Problem::problem_impl_ -> Problem::impl_
NULL -> nullptr

https://github.com/ceres-solver/ceres-solver/issues/417

Change-Id: I6dd94762c475fa264c387b8c93d516f6e06fe832