[eigen] Why doesn't DenseBase have a .cast member function?

To: eigen@xxxxxxxxxxxxxxxxxxx
Subject: [eigen] Why doesn't DenseBase have a .cast member function?
From: Alec Jacobson <alecjacobson@xxxxxxxxx>
Date: Thu, 29 Dec 2016 17:56:16 -0600
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ArrayBase and MatrixBase do. Does this have something to do with expressions?

Follow-Ups:
- Re: [eigen] Why doesn't DenseBase have a .cast member function?
  - From: Gael Guennebaud

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