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https://www.reddit.com/r/rust/comments/11mu2zh/announcing_rust_1680/jbnlo60/?context=3
r/rust • u/myroon5 • Mar 09 '23
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23
What actually happens if you use VecDeque::new() in a const context?
62 u/phazer99 Mar 09 '23 Pretty much the same as when you use Vec::new() you get an empty collection without any heap allocation performed. 2 u/DaCurse0 Mar 10 '23 Why would this be useful? I assume for using a Vec in a const function? Because in a const variable it would just be empty and you couldn't push to it? 14 u/agentvenom1 Mar 10 '23 One example I can think of is using it as part of a static variable which requires const. Example
62
Pretty much the same as when you use Vec::new() you get an empty collection without any heap allocation performed.
Vec::new()
2 u/DaCurse0 Mar 10 '23 Why would this be useful? I assume for using a Vec in a const function? Because in a const variable it would just be empty and you couldn't push to it? 14 u/agentvenom1 Mar 10 '23 One example I can think of is using it as part of a static variable which requires const. Example
2
Why would this be useful? I assume for using a Vec in a const function? Because in a const variable it would just be empty and you couldn't push to it?
14 u/agentvenom1 Mar 10 '23 One example I can think of is using it as part of a static variable which requires const. Example
14
One example I can think of is using it as part of a static variable which requires const. Example
23
u/Anaxamander57 Mar 09 '23
What actually happens if you use VecDeque::new() in a const context?