The author critiques the design of Rust's RangeFrom iterator, pointing out that it fails to yield the maximum value when overflow checks are enabled due to an internal counter increment-before-yield implementation detail. The issue has since been addressed by new range types in std::range, but the post highlights important lessons about iterator semantics and overflow behavior in Rust.
Background
Rust's RangeFrom (e.g., `n..`) is a common iterator type that yields values from n onward. This article is part two of a series examining design flaws in its implementation.
- Source
- Lobsters
- Published
- Sep 1, 2026 at 12:53 AM
- Score
- 6.0 / 10