Accept No Visitors
summary
Visitor Design Pattern is framed as a workaround that forces invasive accept methods, lots of boilerplate, control inversion and poor class extensibility; the alternative proposed is a Match statement implemented as a library (patterns are first class, non‑intrusive, bindings respect member access) that produces local, nested and relational case analysis and often outperforms visitors, while open multimethods give the fastest multiple‑dispatch tables and retroactive virtuals but introduce ambiguity and linker/loader changes.
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chapters (10)
- 0:00Start
- 9:55Traditional Object-Oriented
- 33:05The Pattern Matching
- 36:54What the Library Brings
- 45:52Pattern Matching on Two Arguments
- 52:18Open Multi Methods
- 54:39Experimental Syntax
- 58:49Performance Numbers
- 1:01:38Conclusion
- 1:02:59Dynamic Linking
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