X-Git-Url: https://git.ralfj.de/rust-101.git/blobdiff_plain/8fcdbed310c53f621fba0401399659ed1a1ec446..663d6d7061ead4b53beec69f3ad67ce488f5a924:/src/part06.rs?ds=sidebyside diff --git a/src/part06.rs b/src/part06.rs index 6d50c2d..a4ac764 100644 --- a/src/part06.rs +++ b/src/part06.rs @@ -30,7 +30,7 @@ fn vec_min(v: &Vec) -> Option { let mut min: Option = None; // If `v` is a shared borrowed vector, then the default for iterating over it is to call `iter`, the iterator that borrows the elements. for e in v { - let e = e.clone(); /*@*/ + let e = e.clone(); min = Some(match min { /*@*/ None => e, /*@*/ Some(n) => e.min_try1(n) /*@*/ @@ -50,7 +50,7 @@ fn vec_min(v: &Vec) -> Option { //@ underlying data is transferred from where `e` borrows from to `min`. But that's not allowed, since //@ we just borrowed `e`, so we cannot empty it! We can, however, call `clone` on it. Then we own //@ the copy that was created, and hence we can store it in `min`.
-//@ Of course, making such a full copy is expensive, so we'd like to avoid it. We'll some to that in the next part. +//@ Of course, making such a full copy is expensive, so we'd like to avoid it. We'll come to that in the next part. // ## `Copy` types //@ But before we go there, I should answer the second question I brought up above: Why did our old `vec_min` work? @@ -145,6 +145,6 @@ fn rust_foo(mut v: Vec) -> i32 { //@ are used correctly, *while looking only at the function type*. At no point in our analysis of `rust_foo` did //@ we have to look *into* `head`. That's, of course, crucial if we want to separate library code from application code. //@ Most of the time, we don't have to explicitly add lifetimes to function types. This is thanks to *lifetimes elision*, -//@ where Rust will automatically insert lifetimes we did not specify, following some [simple, well-documented rules](http://doc.rust-lang.org/stable/book/lifetimes.html#lifetime-elision). +//@ where Rust will automatically insert lifetimes we did not specify, following some [simple, well-documented rules](https://doc.rust-lang.org/stable/book/lifetimes.html#lifetime-elision). -//@ [index](main.html) | [previous](part05.html) | [next](part07.html) +//@ [index](main.html) | [previous](part05.html) | [raw source](https://www.ralfj.de/git/rust-101.git/blob_plain/HEAD:/workspace/src/part06.rs) | [next](part07.html)