Merge pull request #2 from mrMiiao/master

Improve some panic stuff

src/interpreter.rs

@@ -14,8 +14,8 @@ pub struct Interpreter {
 }
 
 impl Interpreter {
-    pub fn new(input: String) -> Interpreter {
-        Interpreter {
+    pub fn new(input: String) -> Self {
+        Self {
             input,
             vars: HashMap::new(),
             pos: 1,
@@ -219,8 +219,8 @@ impl Interpreter {
     fn input(&self, value: &String) -> Value {
         let mut input = String::new();
         print!("{}", value);
-        io::stdout().flush().unwrap_or_default();
-        io::stdin().read_line(&mut input).unwrap_or_default();
+        io::stdout().flush().expect("Couldn't flush Stdout");
+        io::stdin().read_line(&mut input).expect("Couldn't read from Stdin");
         Value::String(input.trim_end().to_string())
     }
 

src/main.rs

@@ -1,3 +1,5 @@
+#![feature(box_syntax, panic_info_message)]
+
 use clap::Parser;
 use std::fs;
 use std::time::Instant;
@@ -15,6 +17,15 @@ mod interpreter;
 use interpreter::Interpreter;
 
 fn main() {
+    std::panic::set_hook(
+        box |info| {
+            eprint!("{msg}", msg = match info.message() {
+                None => "Program panicked!".to_owned(),
+                Some(x) => x.to_string()
+            });
+        }
+    );
+    
     let start = Instant::now();
 
     let args = Args::parse();