X-Git-Url: https://git.ralfj.de/rust-101.git/blobdiff_plain/777ede1a30401628dd46e6b177892a5007cdc8da..0c5e5d86510258f57cf2c1f23479b675e14c50d3:/src/part07.rs?ds=sidebyside diff --git a/src/part07.rs b/src/part07.rs index eb1e0dc..e395ba6 100644 --- a/src/part07.rs +++ b/src/part07.rs @@ -4,8 +4,8 @@ pub use part05::BigInt; // With our new knowledge of lifetimes, we are now able to write down the desired type of `min`: -//@ We want the function to take two borrows *of the same lifetime*, and then -//@ return a borrow of that lifetime. If the two input lifetimes would be different, we +//@ We want the function to take two references *with the same lifetime*, and then +//@ return a reference with that lifetime. If the two input lifetimes would be different, we //@ would not know which lifetime to use for the result. pub trait Minimum { fn min<'a>(&'a self, other: &'a Self) -> &'a Self; @@ -66,7 +66,7 @@ impl PartialEq for BigInt { //@ and [`Eq`](https://doc.rust-lang.org/std/cmp/trait.Eq.html). `Eq` can be automatically derived as well. // Now we can compare `BigInt`s. Rust treats `PartialEq` special in that it is wired to the operator `==`: -//@ That operator can not be used on our numbers! Speaking in C++ terms, we just overloaded the `==` operator +//@ That operator can now be used on our numbers! Speaking in C++ terms, we just overloaded the `==` operator //@ for `BigInt`. Rust does not have function overloading (i.e., it will not dispatch to different //@ functions depending on the type of the argument). Instead, one typically finds (or defines) a //@ trait that catches the core characteristic common to all the overloads, and writes a single @@ -147,4 +147,4 @@ fn test_vec_min() { // of course, need a `Display` bound on `T`.) Then you should be able to use them with `println!` just like you do // with numbers, and get rid of the inherent functions to print `SomethingOrNothing` and `SomethingOrNothing`. -//@ [index](main.html) | [previous](part06.html) | [raw source](https://www.ralfj.de/git/rust-101.git/blob_plain/HEAD:/workspace/src/part07.rs) | [next](part08.html) +//@ [index](main.html) | [previous](part06.html) | [raw source](workspace/src/part07.rs) | [next](part08.html)