Updated src/generic_types_traits_and_lifetimes/traits.md'.

projects/trait_demo/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "aggregator"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

projects/trait_demo/src/lib.rs

@@ -11,19 +11,19 @@ pub struct NewsArticle {
 
 impl Summary for NewsArticle {
     fn summarize(&self) -> String {
-        format!("{}, by {} ({})", self.headline, self.author, self.location)
+        format! ("{}, by {} ({})", self.headline, self.author, self.location)
     }
 }
 
-pub struct Tweet {
+pub struct SocialPost {
     pub username: String,
     pub content: String,
     pub reply: bool,
     pub retweet: bool,
 }
 
-impl Summary for Tweet {
+impl Summary for SocialPost {
     fn summarize(&self) -> String {
-        format!("{}: {}", self.username, self.content)
+        format! ("{}: {}", self.username, self.content)
     }
 }

projects/trait_demo/src/main.rs

@@ -0,0 +1,14 @@
+use aggregator::{SocialPost, Summary};
+
+fn main() {
+    let post = SocialPost {
+        username: String::from("horse_ebooks"),
+        content: String::from(
+            "当然，跟大家已经知道的一样，朋友们",
+        ),
+        reply: false,
+        retweet: false,
+    };
+
+    println!("1 个新帖子: {}", post.summarize());
+}