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-rw-r--r--src/doc/book/listings/ch17-oop/listing-17-05/Cargo.lock6
-rw-r--r--src/doc/book/listings/ch17-oop/listing-17-05/Cargo.toml6
-rw-r--r--src/doc/book/listings/ch17-oop/listing-17-05/src/lib.rs17
3 files changed, 29 insertions, 0 deletions
diff --git a/src/doc/book/listings/ch17-oop/listing-17-05/Cargo.lock b/src/doc/book/listings/ch17-oop/listing-17-05/Cargo.lock
new file mode 100644
index 000000000..00d7b2182
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-05/Cargo.lock
@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "gui"
+version = "0.1.0"
+
diff --git a/src/doc/book/listings/ch17-oop/listing-17-05/Cargo.toml b/src/doc/book/listings/ch17-oop/listing-17-05/Cargo.toml
new file mode 100644
index 000000000..9b816e766
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-05/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "gui"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/doc/book/listings/ch17-oop/listing-17-05/src/lib.rs b/src/doc/book/listings/ch17-oop/listing-17-05/src/lib.rs
new file mode 100644
index 000000000..57ebb5782
--- /dev/null
+++ b/src/doc/book/listings/ch17-oop/listing-17-05/src/lib.rs
@@ -0,0 +1,17 @@
+pub trait Draw {
+ fn draw(&self);
+}
+
+pub struct Screen {
+ pub components: Vec<Box<dyn Draw>>,
+}
+
+// ANCHOR: here
+impl Screen {
+ pub fn run(&self) {
+ for component in self.components.iter() {
+ component.draw();
+ }
+ }
+}
+// ANCHOR_END: here