diff options
Diffstat (limited to 'meap/meap-code/ch2/ch2-define-type.rs')
-rw-r--r-- | meap/meap-code/ch2/ch2-define-type.rs | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/meap/meap-code/ch2/ch2-define-type.rs b/meap/meap-code/ch2/ch2-define-type.rs new file mode 100644 index 0000000..45dbcda --- /dev/null +++ b/meap/meap-code/ch2/ch2-define-type.rs @@ -0,0 +1,22 @@ +struct Counter {
+ value: u64, // <1>
+}
+
+impl Counter {
+ fn new() -> Self { // <2> <3>
+ Counter { value: 0 } // <4> <5>
+ }
+
+ fn incr(&mut self) { // <6>
+ self.value += 1;
+ }
+}
+
+fn main() {
+ let mut counter = Counter::new();
+
+ counter.incr();
+ counter.incr();
+
+ println!("{}", counter.value);
+}
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