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| author | Adam Carpenter <53hornet@gmail.com> | 2019-03-27 15:32:37 -0400 |
|---|---|---|
| committer | Adam Carpenter <53hornet@gmail.com> | 2019-03-27 15:32:37 -0400 |
| commit | 67cdcc2e12118becb823e20a40cc2687f2b8425a (patch) | |
| tree | ed92c3234b89079e6d4cf36f5e80c5ffa79def48 /meap/meap-code/ch1/ch1-animals-specialization.rs | |
| parent | e25482fca375d318a39c3b54db396b0db6e0b263 (diff) | |
| download | learning-rust-67cdcc2e12118becb823e20a40cc2687f2b8425a.tar.xz learning-rust-67cdcc2e12118becb823e20a40cc2687f2b8425a.zip | |
Started Rust in Action MEAP.
Diffstat (limited to 'meap/meap-code/ch1/ch1-animals-specialization.rs')
| -rw-r--r-- | meap/meap-code/ch1/ch1-animals-specialization.rs | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/meap/meap-code/ch1/ch1-animals-specialization.rs b/meap/meap-code/ch1/ch1-animals-specialization.rs new file mode 100644 index 0000000..49fc0eb --- /dev/null +++ b/meap/meap-code/ch1/ch1-animals-specialization.rs @@ -0,0 +1,47 @@ +struct Animal {
+ age: i32,
+}
+
+type Cat = Animal;
+type Dog = Animal;
+type LoudDog = Dog;
+
+trait Talk {
+ fn talk(&self) -> ();
+}
+
+impl Talk for Animal {
+ default fn talk(&self) { // note the use of the default
+ println!("<silence>");
+ }
+}
+
+impl Talk for Cat {
+ fn talk(&self) {
+ println!("Meow");
+ }
+}
+
+impl Talk for Dog {
+ fn talk(&self) {
+ println!("Woof!");
+ }
+}
+
+impl Talk for LoudDog {
+ fn talk(&self) {
+ println!("WOOF!!");
+ }
+}
+
+
+
+fn main() {
+ let fluffy = Cat(Animal { age: 4 });
+ let max = Dog(Animal { age: 2 });
+ let neighbours_dog = LoudDog(Animal { age: 7 });
+
+ fluffy.talk();
+ max.talk();
+ neighbours_dog.talk();
+}
|