Move Semantics for Nim
summary
Explains how Nim implements move semantics with three compile-time hooks (copy, sink, destroy) and a sync parameter mode so containers can receive ownership without copies; shows sequence implementation, copy-on-write and atomic-refcount options, and how the compiler emits and optimizes IR via the expand arc command. Claims throughput, latency and memory all improve (benchmarks cited), lets the compiler prove single-owner before sending to another thread, and surfaces exact moves/destructions so deterministic memory/resource management is practical and inspectable.
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chapters (18)
- 0:00Nim - Move semantics
- 0:33Introduction
- 1:22Motivating example
- 2:32What happens in memory (2)
- 3:49Shallow copy, copy, move (2)
- 5:28Explicit move
- 6:48Implicit move (2)
- 9:14Sink parameters (2)
- 12:40Sink: More examples (2)
- 14:17Getters: Lending a value (3)
- 17:25Destructors
- 21:48Move operator
- 22:46Assignment operator
- 23:32Accessors
- 24:30Hooks: flexibility (1)
- 31:37Copy-ellsion is borrowing
- 32:50What is Nim?
- 33:17Questions?
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