From 8633d7d4de1cea3f22bc211b8c7eca37d86fb955 Mon Sep 17 00:00:00 2001
From: Alex Lindsay <alexlindsay239@gmail.com>
Date: Thu, 13 Dec 2018 10:56:12 -0700
Subject: [PATCH] Defaulted default constructors to get both idioms right

---
 src/numerics/include/metaphysicl/dualnumber.h      | 6 ------
 src/numerics/include/metaphysicl/dualnumber_decl.h | 2 +-
 src/numerics/include/metaphysicl/numberarray.h     | 2 +-
 src/numerics/include/metaphysicl/numbervector.h    | 2 +-
 4 files changed, 3 insertions(+), 9 deletions(-)

diff --git a/src/numerics/include/metaphysicl/dualnumber.h b/src/numerics/include/metaphysicl/dualnumber.h
index b6067bd4..b568a3d9 100644
--- a/src/numerics/include/metaphysicl/dualnumber.h
+++ b/src/numerics/include/metaphysicl/dualnumber.h
@@ -131,12 +131,6 @@ DualNumber<T,D>::operator=(const T2 & scalar)
 //
 // Member function definitions
 //
-
-template <typename T, typename D>
-inline
-DualNumber<T,D>::DualNumber() :
-  _val(), _deriv() {}
-
 template <typename T, typename D>
 template <typename T2>
 inline
diff --git a/src/numerics/include/metaphysicl/dualnumber_decl.h b/src/numerics/include/metaphysicl/dualnumber_decl.h
index d2fa49cb..cde7f7c5 100644
--- a/src/numerics/include/metaphysicl/dualnumber_decl.h
+++ b/src/numerics/include/metaphysicl/dualnumber_decl.h
@@ -52,7 +52,7 @@ class DualNumber : public safe_bool<DualNumber<T,D> >
 
   typedef D derivatives_type;
 
-  DualNumber();
+  DualNumber() = default;
 
   template <typename T2>
   DualNumber(const T2& val);
diff --git a/src/numerics/include/metaphysicl/numberarray.h b/src/numerics/include/metaphysicl/numberarray.h
index 328fb77c..af7b07bc 100644
--- a/src/numerics/include/metaphysicl/numberarray.h
+++ b/src/numerics/include/metaphysicl/numberarray.h
@@ -79,7 +79,7 @@ class NumberArray
     typedef NumberArray<N2, T> other;
   };
 
-  NumberArray() : _data() {}
+  NumberArray() = default;
 
   NumberArray(const T& val)
     { std::fill(_data, _data+N, val); }
diff --git a/src/numerics/include/metaphysicl/numbervector.h b/src/numerics/include/metaphysicl/numbervector.h
index 89465d2f..71e61af1 100644
--- a/src/numerics/include/metaphysicl/numbervector.h
+++ b/src/numerics/include/metaphysicl/numbervector.h
@@ -81,7 +81,7 @@ class NumberVector
     typedef NumberVector<N2, T> other;
   };
 
-  NumberVector() {}
+  NumberVector() = default;
 
   NumberVector(const T& val)
     { std::fill(_data, _data+N, val); }