From 4905ad2d6a83e9eee915f3756c71bb33e295ada9 Mon Sep 17 00:00:00 2001
From: Stephan Hageboeck <stephan.hageboeck@cern.ch>
Date: Fri, 12 Jul 2019 13:46:43 +0200
Subject: [PATCH] [RF] Make spans assignable.

---
 core/foundation/inc/ROOT/span.hxx | 6 +++---
 roofit/roofitcore/inc/RooSpan.h   | 3 +++
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/core/foundation/inc/ROOT/span.hxx b/core/foundation/inc/ROOT/span.hxx
index 640f59d47aa28..f458c778f9b64 100644
--- a/core/foundation/inc/ROOT/span.hxx
+++ b/core/foundation/inc/ROOT/span.hxx
@@ -225,7 +225,7 @@ public:
      : length_(l.size()), data_(std::begin(l))
   {}
 
-  span& operator=(span const&) noexcept = delete;
+  span& operator=(span const&) noexcept = default;
   span& operator=(span &&) noexcept = delete;
 
   /*
@@ -432,8 +432,8 @@ private:
   }
 
 private:
-  index_type const length_;
-  pointer const data_;
+  index_type length_;
+  pointer data_;
 };
 // }}}
 } // inline namespace __ROOT
diff --git a/roofit/roofitcore/inc/RooSpan.h b/roofit/roofitcore/inc/RooSpan.h
index f1255c7995ffd..4523f96ef98c2 100644
--- a/roofit/roofitcore/inc/RooSpan.h
+++ b/roofit/roofitcore/inc/RooSpan.h
@@ -101,6 +101,9 @@ class RooSpan {
   { }
 
 
+  RooSpan<T>& operator=(const RooSpan<T>& other) = default;
+
+
   constexpr typename std::span<T>::iterator begin() const {
     return _span.begin();
   }