Change return of MacroProcessor to Result

1 files changed, 11 insertions, 3 deletions

diff --git a/src/macro_processor/main.rs b/src/macro_processor/main.rs
index 247fc85..2d34952 100644
--- a/src/macro_processor/main.rs
+++ b/src/macro_processor/main.rs
@@ -4,9 +4,17 @@ use std::fs;
 
 fn main() {
     let args: Vec<String> = env::args().collect();
-    let input_file = fs::read_to_string(&args[1]).expect("Failed to read input file");
+    let input_file = match fs::read_to_string(&args[1]) {
+        Ok(x) => x,
+        Err(e) => {
+            println!("Could not read input-file \"{}\": {}", args[1], e);
+            std::process::exit(1);
+        }
+    };
 
     let mut macro_processor = MacroProcessor::new();
-    let final_output = macro_processor.process_input(&input_file);
-    println!("{}", final_output);
+    match macro_processor.process_input(&input_file) {
+        Ok(out) => println!("{}", out),
+        Err(e) => println!("Error {}", e),
+    }
 }