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Notes

Last time, we looked at generics and traits at a high level. This time, we dig deeper on traits, looking specifically at std::iter::Iterator as an example of a powerful trait that can be composed across types, and then at how we might compose multiple traits on a single type.

We also talk about the syntax for traits, the use of marker traits, some of the things you can\\u2019t presently do with traits, and even just a smidge about the future of traits in Rust. All that in less than 20 minutes!

You\\u2019ll find today\\u2019s source example fairly interesting, I think: it\\u2019s just one type, but it uses almost every concept discussed on the show today!

Links

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• Nick Cameron: \\u201cThoughts on Rust in 2016\\u201d
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• \\u201cUpcoming breakage starting in Rust 1.7, from RFCs 1214 and 136\\u201d\\n
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  • RFC 1214: Clarify (and improve) rules for projections and well-formedness
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  • RFC 136: Ban private items in public APIs
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• The Rust Book:\\n
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  • Traits
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  • Trait objects (dynamic dispatch)
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• The Rust reference:\\n
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  • std::iter and std::iter::Iterator
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  • Add
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  • Drop
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  • PartialEq and Eq
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  • PartialOrd and Ord
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  • Special traits
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  • Trait objects
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• RFC: impl specialization\\n
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  • Aaron Turon: \\u201cSpecialize to reuse\\u201d
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Sponsors

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• Aleksey Pirogov
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• Chris Palmer
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• Derek Morr
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• Hamza Sheikh
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• Luca Schmid
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• Micael Bergeron
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• Ralph Giles (\\u201crillian\\u201d)
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• reddraggone9
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• William Roe
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Become a sponsor

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• Patreon
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• Dwolla
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• Cash.me
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Follow

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• New Rustacean:\\n
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  • Twitter: @newrustacean
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  • App.net: @newrustacean
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  • Email: hello@newrustacean.com
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• Chris Krycho\\n
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  • Twitter: @chriskrycho
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  • App.net: @chriskrycho
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