Mmastodon TechnologySoftware first seen 2 d ago, last 2 d ago, peak #12
Replacing the Visitor Pattern with Java 21 Sealed Hierarchies
Original: Kill the Visitor Pattern: Refactoring Domain ASTs with Java 21 Sealed Hierarchies For... # java # design # programming #
A developer is arguing that the classic Visitor pattern for traversing abstract syntax trees should be retired, using Java 21's sealed class hierarchies and pattern matching instead. The approach lets exhaustive switch statements handle AST node types directly, removing boilerplate interfaces and accept methods that the pattern traditionally requires.
Why now: Java 21's sealed types and pattern matching have made the long-standing Visitor pattern look outdated, prompting debate among Java developers
Evidence
- Kill the Visitor Pattern: Refactoring Domain ASTs with Java 21 Sealed Hierarchies For... # java # design # programming # computerscience # software # coding # development # engineering # inclusive # community Kill the Visitor Pattern: Refactoring Domain ASTs with Java 21 Sealed… · hackaday@www.urbanmind.net · 3
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