使用Eigen修改null表达式的值 [英] Modifying values of nullary-expressions using Eigen

问题描述

我确实想在Eigen3中编写一个可修改的自定义null表达式。如本征文档所述，似乎nullary表达式不可修改。有没有一种简单的方法来获得可修改的自定义nullary表达式？

I do want to write a custom nullary-expression in Eigen3, which is modifyable. As described in the Eigen documentation it seems like nullary-expression are not modifiable. Is there an easy way to get something like a modifyable custom nullary-expression?

我想用它来编写自定义数据包装器。

I would like to use it to write a custom data wrapper.

推荐答案

Nullary表达式确实是只读的。对于读写表达式，您当前必须编写自己的表达式。为此，您可以从教程开始，并从实现Eigen中的转置表达式。

Nullary-expressions are indeed read-only. For read-write expressions, you currently has to write your own expression. To this end you can start with this tutorial and take inspiration from the implementation of the Transpose expression in Eigen.

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