Look what arrived today! @rustlang #FastAndSafepic.twitter.com/QIgmfNqwdr
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I’ll give you two examples, one from this book and one from TRPL. This book shows you how to write to stderr directly; a few releases after it’s cutoff date, eprintln! was added to make it easy. The code in the book still works! You could just replace it with the new macro.
TRPL’s cutoff will not include the new “impl Trait” feature that will land soonish. But all of the stuff we talk about will still work, 100%. Every new language adds new things in new releases, but we take backwards compatibility very seriously!
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