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Bug 696

Summary:	Zero-sized blocks
Product:	Eigen	Reporter:	Christoph Hertzberg <chtz>
Component:	Core - general	Assignee:	Christoph Hertzberg <chtz>
Status:	RESOLVED FIXED
Severity:	Unknown	CC:	gael.guennebaud, jacob.benoit.1
Priority:	Normal
Version:	3.2
Hardware:	All
OS:	All
Whiteboard:
Bug Depends on:
Bug Blocks:	558

Description Christoph Hertzberg 2013-10-29 13:32:58 UTC

Due to a runtime assert, it is currently not possible to extract fixed-sized blocks where one dimension is zero. (A use-case for that is to reduce trivial branches in user code).
The local fix is trivial, but for proper unit-tests some other parts require adaption as well.

Comment 1 Gael Guennebaud 2016-01-29 11:41:02 UTC

hm, actually a workaround is:

MatrixXd m;
m.block<0,N>(i,j, 0,N);

Comment 2 Gael Guennebaud 2016-01-29 11:45:20 UTC

https://bitbucket.org/eigen/eigen/commits/c35c53729a53/

Comment 3 Nobody 2019-12-04 12:46:20 UTC

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