2 files changed, 45 insertions, 19 deletions
diff --git a/rust/src/lambda.rs b/rust/src/lambda.rs
new file mode 100644
index 0000000..a24b031
--- /dev/null
+++ b/rust/src/lambda.rs
@@ -0,0 +1,40 @@
+use std::{
+    fmt::{self, Display},
+    fs::read_to_string,
+};
+
+pub fn run(arg: &str) -> String {
+    let content = read_to_string(arg).unwrap();
+    let result = interpret(&content.to_string());
+
+    result.to_string()
+}
+
+#[derive(Debug, PartialEq)]
+pub enum Value {
+    Num(i32),
+}
+
+impl Display for Value {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Value::Num(i) => write!(f, "{}", i),
+        }
+    }
+}
+
+fn interpret(_arg: &str) -> Value {
+    Value::Num(1)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::interpret;
+    use super::Value::Num;
+
+    #[test]
+    fn it_works() {
+        let result = interpret("1");
+        assert_eq!(Num(1), result);
+    }
+}
diff --git a/rust/src/main.rs b/rust/src/main.rs
index e18788e..b6cc9bf 100644
--- a/rust/src/main.rs
+++ b/rust/src/main.rs
@@ -1,23 +1,9 @@
-fn main() {
-    println!("Hello, world!");
-}
-
-#[derive(Debug, PartialEq)]
-pub enum Value {
-    Num(i32),
-}
+use std::env::args;
 
-pub fn interpret(arg: &str) -> Value {
-    Value::Num(1)
-}
+use lambda::run;
 
-#[cfg(test)]
-mod tests {
-    use crate::{interpret, Value::Num};
+mod lambda;
 
-    #[test]
-    fn it_works() {
-        let result = interpret("1");
-        assert_eq!(Num(1), result);
-    }
+fn main() {
+    run(&args().nth(1).unwrap());
 }