Implement From<&str> for Program

src/basic.rs

@@ -96,6 +96,13 @@ impl Program {
     }
 }
 
+impl From<&str> for Program {
+    fn from(value: &str) -> Self {
+        let (_, program) = read_program(value).unwrap();
+        program
+    }
+}
+
 impl Iterator for Program {
     type Item = Node;
 

src/main.rs

@@ -4,6 +4,6 @@ mod basic;
 
 fn main() {
     let file = fs::read_to_string("./inputs/simple_program.bas").unwrap();
-    let (_, mut program) = basic::read_program(&file).unwrap();
+    let mut program = basic::Program::from(file.as_str());
     program.execute();
 }