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by waynecochran
2662 days ago
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Yes, this is the only place I have ever used the visitor / double dispatch pattern. The main idea is it fulfills the "Open-Closed" principle: https://en.wikipedia.org/wiki/Open–closed_principle Otherwise you find that your AST data structure is never finished -- you are constantly added stuff to it. I wish there was a clearer way in C++, but this is the C++ solution. |
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