Rust Implementation

assembler/assembler.rs

@@ -1,17 +1,31 @@
-use std::fs::File;
 use std::env;
+use std::fs::File;
 use std::io::{self, BufRead};
 use std::path::Path;
-fn main() -> std::io::Result<()> {
-  let fileName = env::args().nth(1);
-  let fileLines = read_lines(fileName);
-  Ok(())
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+    let filename = parse_config(&args);
+
+    if let Ok(lines) = read_lines(Path::new(filename)) {
+        // Consumes the iterator, returns an (Optional) String
+        for line in lines {
+            if let Ok(ip) = line {
+                println!("{}", ip);
+            }
+        }
+    }
 }
 
+fn parse_config(args: &[String]) -> &str {
+    let filename = &args[1];
+    filename
+}
 
+// The output is wrapped in a Result to allow matching on errors
+// Returns an Iterator to the Reader of the lines of the file.
 fn read_lines<P>(filename: P) -> io::Result<io::Lines<io::BufReader<File>>>
 where P: AsRef<Path>, {
     let file = File::open(filename)?;
     Ok(io::BufReader::new(file).lines())
 }
-