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• 00:44, 16 November 2025 PC talk contribs created page Initialize a large, fixed-size array with non-Copy types in RUST (Created page with "Summary
Need [Option<Box<T>>; N] without Copy or Clone? * Rust ≥ 1.79: let a: [Option<Box<T>>; N] = [const { None }; N]; * Rust ≥ 1.63: let a = std::array::from_fn(|_| None); (works with any initializer logic!) * Rust ≥ 1.38: const INIT: Option<Box<T>> = None; let a = [INIT; N]; (initializer must be a const-eval value) If you’ve ever tried to initialize a fixed-size array of a nullable, non-copyable type in Rust — say, Option<Box<Thing>>...")