impl From<&[T; N]> and From<&mut [T; N]> for Vec<T>

[shepmaster]

I really wanted to write:

fnexample(a:implInto<Vec<u8>>){}fnmain(){example(b"raw");}

[rust-highfive]

r? @dtolnay

(rust-highfive has picked a reviewer for you, use r? to override)

[dtolnay]

@rust-lang/libs-api:
@rfcbot fcp merge

impl<T:Clone,constN:usize>From<&[T;N]>forVec<T>{…}impl<T:Clone,constN:usize>From<&mut[T;N]>forVec<T>{…}

These are array versions of the already-stable conversions from slice to vec.

impl<T:Clone>From<&[T]>forVec<T>{…}// since 1.0.0impl<T:Clone>From<&mut[T]>forVec<T>{…}// since 1.19.0

Array support is useful for methods that use Into<Vec<u8>>, such as https://doc.rust-lang.org/std/ffi/struct.CString.html#method.new.

error[E0277]: the trait bound `Vec<u8>: From<&[u8; 3]>` is not satisfied --> src/main.rs:2:36 |2 | let _ = std::ffi::CString::new(b"+\xff+"); | ---------------------- ^^^^^^^^^ the trait `From<&[u8; 3]>` is not implemented for `Vec<u8>` | | | required by a bound introduced by this call | = help: the following implementations were found: <Vec<u8> as From<&str>> <Vec<u8> as From<CString>> <Vec<u8> as From<String>> <Vec<T, A> as From<Box<[T], A>>> and 6 others = note: required because of the requirements on the impl of `Into<Vec<u8>>` for `&[u8; 3]`note: required by a bound in `CString::new`

[rfcbot]

Team member @dtolnay has proposed to merge this. The next step is review by the rest of the tagged team members:

• @Amanieu
• @BurntSushi
• @dtolnay
• @joshtriplett
• @m-ou-se
• @yaahc

No concerns currently listed.

Once a majority of reviewers approve (and at most 2 approvals are outstanding), this will enter its final comment period. If you spot a major issue that hasn't been raised at any point in this process, please speak up!

See this document for info about what commands tagged team members can give me.

[rfcbot]

🔔 This is now entering its final comment period, as per the review above. 🔔

[dtolnay]

@bors r+

[bors]

📌 Commit 5dd7027 has been approved by dtolnay

[shepmaster]

See #96074 and #96489