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Bug 1536 - Assign double times selfadjointview at to sparseMatrix does not compile
Summary: Assign double times selfadjointview at to sparseMatrix does not compile
Status: NEW
Alias: None
Product: Eigen
Classification: Unclassified
Component: Core - expression templates (show other bugs)
Version: 3.3 (current stable)
Hardware: All All
: Normal Compilation Problem
Assignee: Nobody
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2018-04-04 18:52 UTC by Vincent Huber
Modified: 2019-12-04 17:36 UTC (History)
4 users (show)


Attachments
result of compilation (19.01 KB, text/plain)
2018-04-04 18:52 UTC, Vincent Huber 		no flags Details
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Description Vincent Huber 2018-04-04 18:52:26 UTC 
Created attachment 845 [details]
result of compilation

The following does not compile


```c++
#include <iostream>
#include <fstream>
#include <Eigen/Sparse>

using namespace std;
using namespace Eigen;

int main(int argc, char **args)
{
  SparseMatrix<double> A; 
  SparseMatrix<double> B = 1.*A; 
  SparseMatrix<double> C = A.selfadjointView<Upper>(); 
  SparseMatrix<double> D = 1.*A.selfadjointView<Upper>(); 
  return 0;
}
```
Comment 1 Gael Guennebaud 2018-04-04 21:26:58 UTC 
Workaround:

(1.*A).selfadjointView<Upper>();
Comment 2 Vincent Huber 2018-04-05 07:41:28 UTC 
This expression compiles, but the assignment does not.
Comment 3 Vincent Huber 2018-04-05 07:43:31 UTC 
The (massively ugly) workaround I've found is to put the double into a SparseMatrix that have only one coefficient.
Comment 4 Vincent Huber 2018-04-05 07:59:57 UTC 
(In reply to Vincent Huber from comment #3)
> The (massively ugly) workaround I've found is to put the double into a
> SparseMatrix that have only one coefficient.

I mean the identity times the coef
Comment 5 Nobody 2019-12-04 17:36:08 UTC 
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