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A comment on Grim C++ Tales from the Crypt: The Visitor Pattern (2017). Parent comment

Re:Grim C++ Tales from the Crypt: The Visitor Pattern (2017) by deckar01 on Wednesday March 06, 2019 @10:21AM (#19319509)
I see. There is no interact signature that accepts IThingy, which is the whole point of this pattern. Thanks.
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