main.rs: Cleanup dead and commented-out code

src/main.rs

@@ -1,21 +1,9 @@
 //! Simple frontend for the assembler
 
+use msp430_asm::preamble::*;
 use std::io::Read;
 
-use msp430_asm::preamble::*;
-
-// const ASM: &str = r"
-// //.org 8000
-// //.define INT #2400
-// //entry:
-//     mov.b 8000(sp), r15 ; pop into sp
-//     rrc @pc+
-//     add #64, r8
-//     call #10        // call INT
-// ";
-
 fn main() -> Result<(), Error> {
-    // Get args
     let mut repl = true;
     for arg in std::env::args() {
         match arg.as_str() {
@@ -24,39 +12,23 @@ fn main() -> Result<(), Error> {
         }
     }
 
-    // Decide if repl mode is enabled
     let mut buf = String::new();
-
     if repl {
-        // print!("> ");
-        // let _ = std::io::stdout().flush();
         while let Ok(len) = std::io::stdin().read_line(&mut buf) {
             match len {
-                0 => break,
-                1 => continue,
+                0 => break,    // No newline (reached EOF)
+                1 => continue, // Line is empty
                 _ => (),
             }
-            if len < 1 {
-                break;
-            }
-            // print!("\nLexer:  ");
-            // tokenizer_dump(&mut Tokenizer::new(&buf));
-            //print!("Parser: ");
             match Parser::default().parse(&buf) {
                 Ok(line) => println!("{line:x}"),
-                //Ok(tree) => println!("=> {tree}\n  => {tree:x}"),
                 Err(error) => println!("{error}"),
             }
-            buf.clear();
-            // print!("> ");
-            // let _ = std::io::stdout().flush();
+            buf.clear(); // Reuse buf's allocation
         }
     } else {
         std::io::stdin().lock().read_to_string(&mut buf).map_err(|_| Error::EndOfFile)?;
         let mut tk = Tokenizer::new(&buf);
-
-        // println!("Lexer:  ");
-        // tokenizer_dump(&mut Tokenizer::new(&buf));
         let tree = Parser::default().parse_with(&mut tk);
         match &tree {
             Ok(tree) => println!("{tree:x}"),
@@ -66,39 +38,3 @@ fn main() -> Result<(), Error> {
 
     Ok(())
 }
-
-#[allow(dead_code)]
-fn tokenizer_dump<'text, T: TokenStream<'text>>(t: &mut T) {
-    for token in t {
-        match token.variant() {
-            //Token::Space => (),
-            Type::Endl => {
-                println!();
-                continue;
-            }
-            Type::Comment => (),
-            Type::Label => (),
-            Type::Insn => (),
-            Type::ByteWidth => (),
-            Type::WordWidth => (),
-            Type::Register => (),
-            Type::RadixMarkerHex => (),
-            Type::RadixMarkerOct => (),
-            Type::RadixMarkerBin => (),
-            Type::Number => (),
-            Type::Minus => (),
-            Type::LParen => (),
-            Type::RParen => (),
-            Type::Indirect => (),
-            Type::Plus => (),
-            Type::Absolute => (),
-            Type::Immediate => (),
-            Type::Identifier => (),
-            Type::Directive => (),
-            Type::Separator => (),
-            Type::EndOfFile => (),
-            _ => continue,
-        };
-        print!("{token:?} ");
-    }
-}