Update Ceres to latest upstream version 2.1.0temp-ceres_update

This release deprecated the Parameterization API and the new Manifolds
API is to be used instead. This is what was done in the Libmv as part
of this change.

Additionally, remove the bundling scripts. Nowadays those are only
leading to a duplicated work to maintain.

1 files changed, 4 insertions, 4 deletions

diff --git a/extern/ceres/internal/ceres/casts.h b/extern/ceres/internal/ceres/casts.h
index d13707131c2..04d8ba4fe33 100644
--- a/extern/ceres/internal/ceres/casts.h
+++ b/extern/ceres/internal/ceres/casts.h
@@ -32,14 +32,13 @@
 #define CERES_INTERNAL_CASTS_H_
 
 #include <cassert>
-#include <cstddef>  // For NULL.
 
 namespace ceres {
 
 // Identity metafunction.
 template <class T>
 struct identity_ {
-  typedef T type;
+  using type = T;
 };
 
 // Use implicit_cast as a safe version of static_cast or const_cast
@@ -86,6 +85,7 @@ inline To implicit_cast(typename identity_<From>::type const& f) {
 //    if (dynamic_cast<Subclass2>(foo)) HandleASubclass2Object(foo);
 // You should design the code some other way not to need this.
 
+// TODO(sameeragarwal): Modernize this.
 template <typename To, typename From>  // use like this: down_cast<T*>(foo);
 inline To down_cast(From* f) {         // so we only accept pointers
   // Ensures that To is a sub-type of From *.  This test is here only
@@ -95,11 +95,11 @@ inline To down_cast(From* f) {         // so we only accept pointers
 
   // TODO(csilvers): This should use COMPILE_ASSERT.
   if (false) {
-    implicit_cast<From*, To>(NULL);
+    implicit_cast<From*, To>(nullptr);
   }
 
   // uses RTTI in dbg and fastbuild. asserts are disabled in opt builds.
-  assert(f == NULL || dynamic_cast<To>(f) != NULL);  // NOLINT
+  assert(f == nullptr || dynamic_cast<To>(f) != nullptr);  // NOLINT
   return static_cast<To>(f);
 }