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| -rw-r--r-- | src/doc/book/strings.md | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/doc/book/strings.md b/src/doc/book/strings.md index 5ed1f3de062..f5ebceedd36 100644 --- a/src/doc/book/strings.md +++ b/src/doc/book/strings.md @@ -44,6 +44,11 @@ let s = "foo\ assert_eq!("foobar", s); ``` +Note that you normally cannot access a `str` directly, but only through a `&str` +reference. This is because `str` is an unsized type which requires additional +runtime information to be usable. For more information see the chapter on +[unsized types][ut]. + Rust has more than only `&str`s though. A `String` is a heap-allocated string. This string is growable, and is also guaranteed to be UTF-8. `String`s are commonly created by converting from a string slice using the `to_string` @@ -185,5 +190,6 @@ let hello_world = hello + &world; This is because `&String` can automatically coerce to a `&str`. This is a feature called ‘[`Deref` coercions][dc]’. +[ut]: unsized-types.html [dc]: deref-coercions.html [connect]: ../std/net/struct.TcpStream.html#method.connect |