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Bug 710

Summary: SparseMatrix< shared_ptr<X> > is not working (patch attached)
Product: Eigen Reporter: Takaki Makino <t-eigen-bugzilla>
Component: SparseAssignee: Nobody <eigen.nobody>
Status: NEW ---    
Severity: Unknown    
Priority: Normal    
Version: 3.2   
Hardware: All   
OS: All   
Description Flags
Proposed patch file for 3.2.0 none

Description Takaki Makino 2013-12-06 16:26:17 UTC
Created attachment 404 [details]
Proposed patch file for 3.2.0

When we use a custom Scalar type that require initialization
(like std::shared_ptr), the sparse matrix classes do not work correctly.
The problem is that some classes in SparseCore use memcpy() and memmove() functions, which breaks the C++ object semantics.
I found smart_copy function in Core/Memory.h, which seems currently abandoned, but perfectly suitable for replacing these memcpy()s. As a replacement of memmove(), I make an extension to smart_copy, which detects overlapping region and uses C++11 move semantics if applicable.
Attached please find a proposed patch that replaces all memcpy() into smart_copy.
Comment 1 Nobody 2019-12-04 12:51:00 UTC
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