From 23180b03a96d78068d54def426d4bfb855a4a026 Mon Sep 17 00:00:00 2001
From: Edgar Solomonik <solomon2@illinois.edu>
Date: Fri, 9 Aug 2019 16:50:11 -0500
Subject: [PATCH] handle std::move for uninitialized tensors

---
 src/interface/tensor.cxx      | 11 +++++++++--
 src/tensor/algstrct.cxx       |  2 ++
 src/tensor/algstrct.h         |  4 ++--
 src/tensor/untyped_tensor.cxx | 11 ++++++++++-
 4 files changed, 23 insertions(+), 5 deletions(-)

diff --git a/src/interface/tensor.cxx b/src/interface/tensor.cxx
index 032b41ca..d4ce3b42 100644
--- a/src/interface/tensor.cxx
+++ b/src/interface/tensor.cxx
@@ -1726,8 +1726,15 @@ NORM_INFTY_INST(double)
   Tensor<dtype>& Tensor<dtype>::operator=(Tensor<dtype> A){
 
     free_self();
-    init(A.sr, A.order, A.lens, A.sym, A.wrld, 0, A.name, A.profile, A.is_sparse);
-    copy_tensor_data(&A);
+    if (A.order < 0){
+      this->order = A.order;
+      if (A.order == -1){
+        this->sr = A.sr->clone();
+      }
+    } else {
+      init(A.sr, A.order, A.lens, A.sym, A.wrld, 0, A.name, A.profile, A.is_sparse);
+      copy_tensor_data(&A);
+    }
     return *this;
 /*
     sr = A.sr;
diff --git a/src/tensor/algstrct.cxx b/src/tensor/algstrct.cxx
index 601b5547..106a1e9e 100644
--- a/src/tensor/algstrct.cxx
+++ b/src/tensor/algstrct.cxx
@@ -66,6 +66,8 @@ namespace CTF_int {
   };
 
 
+  algstrct::~algstrct(){ }
+
   algstrct::algstrct(int el_size_){
     el_size = el_size_;
     has_coo_ker = false;
diff --git a/src/tensor/algstrct.h b/src/tensor/algstrct.h
index d422f3ed..2b884a9e 100644
--- a/src/tensor/algstrct.h
+++ b/src/tensor/algstrct.h
@@ -66,7 +66,7 @@ namespace CTF_int {
       /**
        * \brief destructor
        */
-      virtual ~algstrct() = 0;
+      virtual ~algstrct();
 
       /**
        * \brief ''copy constructor''
@@ -447,7 +447,7 @@ namespace CTF_int {
 
   };
   //http://stackoverflow.com/questions/630950/pure-virtual-destructor-in-c
-  inline algstrct::~algstrct(){}
+  //inline algstrct::~algstrct(){}
 
   /**
    * \brief depins keys of n pairs
diff --git a/src/tensor/untyped_tensor.cxx b/src/tensor/untyped_tensor.cxx
index ab8a2de2..e8673de2 100644
--- a/src/tensor/untyped_tensor.cxx
+++ b/src/tensor/untyped_tensor.cxx
@@ -73,8 +73,10 @@ namespace CTF_int {
       delete sr;
       cdealloc(name);
     }
-    if (order == -1)
+    if (order == -1){
       delete sr;
+      order = -2;
+    }
   }
 
   tensor::~tensor(){
@@ -172,6 +174,13 @@ namespace CTF_int {
   }
 
   tensor::tensor(tensor const * other, bool copy, bool alloc_data){
+    if (other->order < 0){
+      this->order = other->order;
+      if (other->order == -1){
+        this->sr = other->sr->clone();
+      }
+      return;
+    }
     char * nname = (char*)alloc(strlen(other->name) + 2);
     char d[] = "\'";
     strcpy(nname, other->name);