Lifetimes in Data Structures

https://google.github.io/comprehensive-rust/ownership/lifetimes-data-structures.html

when possible, data structures ought to own their data directly, rather
than borrowing a reference.

src/main.rs

@@ -1,22 +1,16 @@
 #[derive(Debug)]
-struct Point(i32, i32);
+struct Highlight<'doc>(&'doc str);
 
-fn left_most<'a>(p1: &'a Point, p2: &'a Point) -> &'a Point {
-    if p1.0 < p2.0 {
-        p1
-    } else {
-        p2
-    }
+#[allow(dead_code)]
+fn erase(text: String) {
+    println!("Bye {text}!");
 }
 
 fn main() {
-    let p1: Point = Point(10, 10);
-    let p2: Point = Point(20, 20);
-    {
-        let p3: &Point = left_most(&p1, &p2);
-
-        println!("left_most: {:?}", p3);
-        println!("p3: {:p}", &p3);
-    }
-    println!("p1: {:p}", &p1);
+    let text = String::from("The quick brown fox jumps over the lazy dog.");
+    let fox = Highlight(&text[4..19]);
+    let dog = Highlight(&text[35..43]);
+    //erase(text);
+    println!("{fox:?}");
+    println!("{dog:?}");
 }

target/.rustc_info.json

@@ -1 +1 @@
-{"rustc_fingerprint":16320356917333427825,"outputs":{"10376369925670944939":{"success":true,"status":"","code":0,"stdout":"___\nlib___.rlib\nlib___.so\nlib___.so\nlib___.a\nlib___.so\n/home/vbatts/.rustup/toolchains/stable-x86_64-unknown-linux-gnu\ndebug_assertions\npanic=\"unwind\"\nproc_macro\ntarget_arch=\"x86_64\"\ntarget_endian=\"little\"\ntarget_env=\"gnu\"\ntarget_family=\"unix\"\ntarget_feature=\"fxsr\"\ntarget_feature=\"sse\"\ntarget_feature=\"sse2\"\ntarget_has_atomic=\"16\"\ntarget_has_atomic=\"32\"\ntarget_has_atomic=\"64\"\ntarget_has_atomic=\"8\"\ntarget_has_atomic=\"ptr\"\ntarget_os=\"linux\"\ntarget_pointer_width=\"64\"\ntarget_vendor=\"unknown\"\nunix\n","stderr":""},"15697416045686424142":{"success":true,"status":"","code":0,"stdout":"___\nlib___.rlib\nlib___.so\nlib___.so\nlib___.a\nlib___.so\n","stderr":""},"4614504638168534921":{"success":true,"status":"","code":0,"stdout":"rustc 1.66.1 (90743e729 2023-01-10)\nbinary: rustc\ncommit-hash: 90743e7298aca107ddaa0c202a4d3604e29bfeb6\ncommit-date: 2023-01-10\nhost: x86_64-unknown-linux-gnu\nrelease: 1.66.1\nLLVM version: 15.0.2\n","stderr":""}},"successes":{}}
+{"rustc_fingerprint":16320356917333427825,"outputs":{"15697416045686424142":{"success":true,"status":"","code":0,"stdout":"___\nlib___.rlib\nlib___.so\nlib___.so\nlib___.a\nlib___.so\n","stderr":""},"4614504638168534921":{"success":true,"status":"","code":0,"stdout":"rustc 1.66.1 (90743e729 2023-01-10)\nbinary: rustc\ncommit-hash: 90743e7298aca107ddaa0c202a4d3604e29bfeb6\ncommit-date: 2023-01-10\nhost: x86_64-unknown-linux-gnu\nrelease: 1.66.1\nLLVM version: 15.0.2\n","stderr":""},"10376369925670944939":{"success":true,"status":"","code":0,"stdout":"___\nlib___.rlib\nlib___.so\nlib___.so\nlib___.a\nlib___.so\n/home/vbatts/.rustup/toolchains/stable-x86_64-unknown-linux-gnu\ndebug_assertions\npanic=\"unwind\"\nproc_macro\ntarget_arch=\"x86_64\"\ntarget_endian=\"little\"\ntarget_env=\"gnu\"\ntarget_family=\"unix\"\ntarget_feature=\"fxsr\"\ntarget_feature=\"sse\"\ntarget_feature=\"sse2\"\ntarget_has_atomic=\"16\"\ntarget_has_atomic=\"32\"\ntarget_has_atomic=\"64\"\ntarget_has_atomic=\"8\"\ntarget_has_atomic=\"ptr\"\ntarget_os=\"linux\"\ntarget_pointer_width=\"64\"\ntarget_vendor=\"unknown\"\nunix\n","stderr":""}},"successes":{}}