Merge pull request #225 from josephcsible/patch-1

Use LazyLock instead of OnceLock in the std example

Author: KodrAus

README.md

@@ -63,29 +63,26 @@ fn main() {
 
 # Standard library
 
-It is now possible to easily replicate this crate's functionality in Rust's standard library with [`std::sync::OnceLock`](https://doc.rust-lang.org/std/sync/struct.OnceLock.html). The example above could also be written as:
+It is now possible to easily replicate this crate's functionality in Rust's standard library with [`std::sync::LazyLock`](https://doc.rust-lang.org/std/sync/struct.LazyLock.html). The example above could also be written as:
 
 ```rust
 use std::collections::HashMap;
-use std::sync::OnceLock;
+use std::sync::LazyLock;
 
-fn hashmap() -> &'static HashMap<u32, &'static str> {
-    static HASHMAP: OnceLock<HashMap<u32, &str>> = OnceLock::new();
-    HASHMAP.get_or_init(|| {
-        let mut m = HashMap::new();
-        m.insert(0, "foo");
-        m.insert(1, "bar");
-        m.insert(2, "baz");
-        m
-    })
-}
+static HASHMAP: LazyLock<HashMap<u32, &str>> = LazyLock::new(|| {
+    let mut m = HashMap::new();
+    m.insert(0, "foo");
+    m.insert(1, "bar");
+    m.insert(2, "baz");
+    m
+});
 
 fn main() {
     // First access to `HASHMAP` initializes it
-    println!("The entry for `0` is \"{}\".", hashmap().get(&0).unwrap());
+    println!("The entry for `0` is \"{}\".", HASHMAP.get(&0).unwrap());
 
     // Any further access to `HASHMAP` just returns the computed value
-    println!("The entry for `1` is \"{}\".", hashmap().get(&1).unwrap());
+    println!("The entry for `1` is \"{}\".", HASHMAP.get(&1).unwrap());
 }
 ```