Initialize Rust project with billing calculation functionality

1 files changed, 44 insertions, 0 deletions

diff --git a/src/who.rs b/src/who.rs
new file mode 100644
index 0000000..9d6e5b5
--- /dev/null
+++ b/src/who.rs
@@ -0,0 +1,44 @@
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct Who {
+    name: String,
+}
+
+impl std::ops::Deref for Who {
+    type Target = String;
+
+    fn deref(&self) -> &Self::Target {
+        &self.name
+    }
+}
+
+impl std::ops::DerefMut for Who {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.name
+    }
+}
+
+impl From<String> for Who {
+    fn from(s: String) -> Self {
+        Who { name: s }
+    }
+}
+
+impl From<&str> for Who {
+    fn from(s: &str) -> Self {
+        Who {
+            name: s.to_string(),
+        }
+    }
+}
+
+impl Into<String> for Who {
+    fn into(self) -> String {
+        self.name
+    }
+}
+
+impl std::fmt::Display for Who {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", self.name)
+    }
+}