The article identifies Iterator::fuse() as the only guaranteed specialization mechanism in stable Rust. Unlike previous tricks that break with language updates, fuse() is explicitly documented to become a no-op when the iterator implements FusedIterator. A code example demonstrates runtime trait detection using this pattern.
Infrastructure
Stable specialization in Rust
Iterator::fuse() is the only guaranteed, documented specialization mechanism in stable Rust—unlike previous tricks that break with language updates, it reliably becomes a no-op when the iterator implements FusedIterator, enabling runtime trait detection patterns.
Thursday, April 30, 2026 12:00 PM UTC2 MIN READSOURCE: LobstersBY sys://pipeline
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infrastructure