Visitor Revisitted: LINQ, Function Composablity and Chain of Responsib

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Visitor Revisitted: LINQ, Function Composablity and Chain of Responsib (blogs.msdn.com)

submitted by CharlieCalvert(7835) 2 years, 9 months ago

Jomo Fisher—Last time, I wrote about constructing an inline visitor using new C# language features. It worked fine for what it did, but it completely falls down when you want to extend existing visitors that you’ve created. What if I wanted to modify the PrintTree delegate to print negative numbers inside parentheses? There’s not a way to do it. This is a serious limitation, especially when you have hundreds of node types in your tree structure.

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