ref main.rs

src/main.rs

@@ -18,13 +18,13 @@ use vm::*;
 // https://p.rogram.me/grassmudhorse.js/grassmudhorse.js
 fn main() {
     let is_help = env::args().any(|a| a == "-h" || a == "--help");
+    let is_debug = env::args().any(|a| a == "-d" || a == "--debug");
+    let arg_file = env::args().filter(|a| !a.starts_with("-")).nth(1);
+    
     if is_help {
         println!("grassmudhorse.rs v0.1");
         return;
     }
-    let is_debug = env::args().any(|a| a == "-d" || a == "--debug");
-
-    let arg_file = env::args().filter(|a| !a.starts_with("-")).nth(1);
 
     let input = match arg_file {
         Some(f) => match read_to_string(&f) {
@@ -37,16 +37,13 @@ fn main() {
             let mut buff = String::new();
             use std::io::Read;
             match std::io::stdin().lock().read_to_string(&mut buff) {
-                Ok(_) => buff,
+                Ok(_) => buff, Err(err) => {
-                Err(err) => {
                     println!("[ERROR] Read stdin, error: {}", err);
                     return;
                 }
             }
         },
     };
-    
-    
 
     let instructions = match parse_lang(&input) {
         Ok(i) => i, Err(err) => {