From 60d07287c9db798894420a1816e97d8b36cc3b4a Mon Sep 17 00:00:00 2001
From: Frank Dellaert <dellaert@gmail.com>
Date: Mon, 8 Apr 2019 16:52:41 -0400
Subject: [PATCH] made KeyInfoEntry into a struct

---
 gtsam/linear/IterativeSolver.h | 23 +++++------------------
 1 file changed, 5 insertions(+), 18 deletions(-)

diff --git a/gtsam/linear/IterativeSolver.h b/gtsam/linear/IterativeSolver.h
index 92dcbfa07..f0fbfbfd2 100644
--- a/gtsam/linear/IterativeSolver.h
+++ b/gtsam/linear/IterativeSolver.h
@@ -32,8 +32,8 @@
 namespace gtsam {
 
 // Forward declarations
+struct KeyInfoEntry;
 class KeyInfo;
-class KeyInfoEntry;
 class GaussianFactorGraph;
 class Values;
 class VectorValues;
@@ -109,27 +109,14 @@ public:
 
 /**
  * Handy data structure for iterative solvers
- * key to (index, dimension, colstart)
+ * key to (index, dimension, start)
  */
-class GTSAM_EXPORT KeyInfoEntry: public boost::tuple<Key, size_t, Key> {
-
-public:
-
-  typedef boost::tuple<Key, size_t, Key> Base;
-
+struct GTSAM_EXPORT KeyInfoEntry {
+  size_t index, dim, start;
   KeyInfoEntry() {
   }
   KeyInfoEntry(size_t idx, size_t d, Key start) :
-      Base(idx, d, start) {
-  }
-  size_t index() const {
-    return this->get<0>();
-  }
-  size_t dim() const {
-    return this->get<1>();
-  }
-  size_t colstart() const {
-    return this->get<2>();
+      index(idx), dim(d), start(start) {
   }
 };