X-Git-Url: https://git.ralfj.de/rust-101.git/blobdiff_plain/832768ac8f69b436c1f90ad7a2f01af25091599a..effe564cc436346993a7a463a326e397e226f5b6:/src/part08.rs?ds=sidebyside diff --git a/src/part08.rs b/src/part08.rs index 2c6dfc5..340de24 100644 --- a/src/part08.rs +++ b/src/part08.rs @@ -91,13 +91,13 @@ impl ops::Add for BigInt { } } -// ## Traits and borrowed types +// ## Traits and reference types //@ If you inspect the addition function above closely, you will notice that it actually consumes ownership of both operands //@ to produce the result. This is, of course, in general not what we want. We'd rather like to be able to add two `&BigInt`. // Writing this out becomes a bit tedious, because trait implementations (unlike functions) require full explicit annotation // of lifetimes. Make sure you understand exactly what the following definition says. Notice that we can implement a trait for -// a borrowed type! +// a reference type! impl<'a, 'b> ops::Add<&'a BigInt> for &'b BigInt { type Output = BigInt; fn add(self, rhs: &'a BigInt) -> Self::Output {