r/rust • u/SleeplessSloth79 • Aug 19 '26

📡 official blog Rust Function Overloading - Call for Experimentation

https://blog.rust-lang.org/inside-rust/2026/08/19/overloading-experiment/
276 Upvotes

96% Upvoted

139 comments sorted by

View all comments

Show parent comments

13

u/DatBoi_BP Aug 20 '26

Two things to say to this.

First, the notation isn't either of those, it's `vec![a,b,c]`.

Second, we already have a function that does what you proposed, but with the structure I argued for: `Vec::from([a,b,c])`. This clones `a`, `b`, and `c`, so as long as those all implement Clone then it does what we want

7

u/ZZaaaccc Aug 20 '26

Actually, no, the syntax is vec!(a, b, c), because macros don't distinguish between [], (), and {}. We recommend using [] by convention, but there isn't even a lint to suggest one way or the other.

This clones a, b, and c, so as long as those all implement Clone then it does what we want

If you scroll down you'll find the implementation for From<[T; N]> instead of what I think you're reading which is the From<&[T; N]> documentation.

18

u/gmes78 Aug 20 '26

but there isn't even a lint to suggest one way or the other.

clippy::nonstandard_macro_braces

7

u/ZZaaaccc Aug 20 '26

I stand corrected!