Re: [eigen] Operations involving constants

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To: eigen <eigen@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [eigen] Operations involving constants
From: Gael Guennebaud <gael.guennebaud@xxxxxxxxx>
Date: Fri, 24 Oct 2014 10:59:03 +0200
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On Thu, Oct 23, 2014 at 11:28 AM, Christoph Hertzberg <chtz@xxxxxxxxxxxxxxxxxxxxxxxx> wrote:

Developer-question:
Is there a reason why we implement operator+(Scalar) as CwiseUnaryOp, but max(Scalar) as CwiseBinaryOp?

Maybe laziness to implement new functors when we added these max/man variants. A posteriori this might be a good thing as max is not always commutative, e.g., with NaN.

Another question is why having specialized functors for operator+(Scalar) and the likes, and the motivation was to ease compiler work. This also simplifies catching scalar multiples in sub-expressions.

gael

References:
- [eigen] Operations involving constants
  - From: oz
- Re: [eigen] Operations involving constants
  - From: Christoph Hertzberg

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