add a note to the README about this being a tutorial for an ancient version of Rust

[rust-101.git] / src / part06.rs

diff --git a/src/part06.rs b/src/part06.rs
index de90cb64e6a3236ad412881b61ebbf3607d74fda..4c7ee24fdeedfab73af6b88b05df989b37623297 100644 (file)
--- a/src/part06.rs
+++ b/src/part06.rs
@@ -127,7 +127,7 @@ fn head<T>(v: &Vec<T>) -> Option<&T> {
 //@ have aliasing (of `first` and `v`) and mutation. But this time, the bug is hidden behind the
 //@ call to `head`. How does Rust solve this? If we translate the code above to Rust, it doesn't
 //@ compile, so clearly we are good - but how and why?
-//@ (Notice that have to explicitly assert using `unwrap` that `first` is not `None`, whereas
+//@ (Notice that we use `unwrap` to explicitly assert that `first` is not `None`, whereas
 //@ the C++ code above would silently dereference a `NULL`-pointer. But that's another point.)
 fn rust_foo(mut v: Vec<i32>) -> i32 {
     let first: Option<&i32> = head(&v);