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copying: deep vs shallow copy module (clone() traps, copy constructors, serialization copy, records, defensive copies, collection copies), 17 contract tests

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Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_017ic4b4X2xx7RrveVQU9R1N
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asmhatre
2026-11-12 20:18:06 +05:30
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copying/output/04-copy-constructor.txt
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== 1. Copy constructor: new object, own list, final fields intact ==
rex = Dog(Rex, [sit, roll]) bark=7
rex2 = Dog(Rex, [sit, roll]) bark=7
rex2.tricks == rex.tricks : false
== 2. The static type picks the constructor, so a subtype is sliced off ==
new Animal(pet) = Animal(Rex, [sit, roll])
== 3. A virtual copy() keeps the runtime type ==
pet.copy() = Dog(Rex, [sit, roll]) bark=7