msp430-asm: use macro_rules! instead of nightly macro syntax.

It may be nice, but y'know what's nicer? Building on stable.

examples/msp430-help/main.rs

@@ -1,7 +1,6 @@
 // This example contains information adapted from the MSPGCC project's documentation.
 // As such, it is licensed under the GPL, to the extent that such a thing is possible.
 // https://mspgcc.sourceforge.net/manual/ln16.html
-#![feature(decl_macro)]
 
 fn main() {
     println!("Hello, world!")

msp430-asm/src/lib.rs

@@ -1,5 +1,4 @@
 //! Helper library for msp430-asm
-#![feature(decl_macro)]
 pub mod split_twice {
     /// Slices a collection into a beginning, middle, and end, based on two unordered indices
     pub trait SplitTwice<'t> {
@@ -63,30 +62,51 @@ pub mod cursor {
     use std::fmt::{Arguments, Display};
 
     /// Moves to the {line}th previous line
-    pub macro previous($line:literal) {
-        csi!("{}F", $line)
+    #[macro_export]
+    macro_rules! previous {
+        ($line:literal) => {
+            csi!("{}F", $line)
+        };
     }
 
     /// Injects a Command Sequence Introducer
-    pub macro csi($($t:tt)*) {
-        format_args!("\x1b[{}", format_args!($($t)*))
+    #[macro_export]
+    macro_rules! csi {
+            ($($t:tt)*) => {
+            format_args!("\x1b[{}", format_args!($($t)*))
+        };
     }
 
     /// Formats the args with a foreground [Color]
-    pub macro fg($fg:expr, $($t:tt)*) {
-        Colorized::new(Some($fg), None, format_args!($($t)*))
+    #[macro_export]
+    macro_rules! fg {
+        ($fg:expr, $($t:tt)*) => {
+            Colorized::new(Some($fg), None, format_args!($($t)*))
+        };
     }
 
     /// Formats the args with a background [Color]
-    pub macro bg($bg:expr, $(t:tt)*) {
-        Colorized::new(None, Some($bg), format_args!($($t)*))
+    #[macro_export]
+    macro_rules! bg {
+        ($bg:expr, $(t:tt)*) => {
+            Colorized::new(None, Some($bg), format_args!($($t)*))
+        };
     }
 
     /// Formats the args with both a foreground and background [Color]
-    pub macro color($fg:expr, $bg:expr, $($t:tt)*) {
-        Colorized::new(Some($fg), Some($bg), format_args!($($t)*))
+    #[macro_export]
+    macro_rules! color {
+        ($fg:expr, $bg:expr, $($t:tt)*) => {
+            Colorized::new(Some($fg), Some($bg), format_args!($($t)*))
+        }
     }
 
+    pub use bg;
+    pub use color;
+    pub use csi;
+    pub use fg;
+    pub use previous;
+
     #[derive(Clone, Copy, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
     pub enum Color {
         #[default]

msp430-asm/src/main.rs

@@ -1,7 +1,6 @@
 // © 2023-2024 John Breaux
 //See LICENSE.md for license
 //! Simple frontend for the assembler
-#![feature(decl_macro)]
 use argp::parse_args_or_exit;
 use libmsp430::{
     assembler::Assemble,
@@ -66,14 +65,16 @@ mod repl {
     use std::io::{stderr, Write};
 
     /// Formats the line number
-    macro linenr($n: expr) {
-        format_args!("{:4}: ", $n)
+    macro_rules! linenr {
+        ($n: expr) => {
+            format_args!("{:4}: ", $n)
+        };
     }
 
     /// [println], but without the newline
-    macro printfl ($($x: expr),+) {
+    macro_rules! printfl {($($x: expr),+) => {
         {print!($($x),+); let _ = ::std::io::stdout().flush();}
-    }
+    }}
 
     /// Runs the read-evaluate-print loop
     pub fn repl(buf: &mut String) -> Result<(), Box<dyn Error>> {

sample-asm/shellcode.asm

@@ -1,13 +1,11 @@
 ; © 2023-2024 John Breaux
 ; Comtains spoilers for Microcorruption Halifax! Be warned!
-; just hash the first 0x140 B and stick them in memory
 
 
 const:
 .define msize  0x1    ; length of each hash in bytes
 .define hsize  0x3    ; bytes kept per hash (only needs to be 3 to determine 1 byte of sram)
 .define sr_len 0x140  ; number of bytes in sram to dump
-.define ha_len 0x3c0  ; number of bytes in hash array (hsize * sr_len)
 .define haddr  0x7000 ; address of the big hash array
 .define iaddr  0x8000 ; address of the sram input buffer
 .define kaddr  0x9000 ; address of the key buffer
@@ -24,7 +22,7 @@ external_func:
 .define puts            #0x4586
 ; memcpy(void *dest, void *src, size_t len)
 .define memcpy          #0x45a4
-; sha256_internal(void * sram_addr, size_t sr_len, void * sha_buf)
+; sha256_internal(void *sram_addr, size_t sr_len, void * sha_buf)
 .define sha256_internal #0x45b6
 ; memset(void* buf, char value, size_t length)
 .define memset          #0x45c8
@@ -35,10 +33,10 @@ get_sram_hashes:
     mov   #haddr, r13           ; set destination to 0x8000
     sr_loop:
         mov   r11, r15          ; mov addr r15
-        call  sha256_internal   ; <sha256_internal>
+        call  sha256_internal   ; sha256_internal (i, msize, haddr + i * hsize)
         add   #hsize, r13       ; keep 3 bytes of the output
         inc   r11               ; inc r11
-        cmp   #sr_len, r11      ; do that 0x1000 times
+        cmp   #sr_len, r11      ; do that sram_len times
         jnc   sr_loop
 
 print_hex:
@@ -53,27 +51,27 @@ print_hex:
         clrc
         and   #0xf, r14
         mov.b HEX_LUT(r15), r15
-        call  putchar           ; <putchar>
+        call  putchar           ; putchar (HEX_LUT[haddr[i] >> 4])
         mov.b HEX_LUT(r14), r15
-        call  putchar           ; <putchar>
-        inc   r11               ; inc r11
-        cmp   #ha_len, r11      ; do that sram_length*3 times
+        call  putchar           ; putchar (HEX_LUT[haddr[i] & 0xf])
+        inc   r11
+        cmp   #sr_len * hsize, r11  ; do that sram_length * hash_size times
         jnc   ph_loop
 
-    mov.b #0xa, r15             ; '\n'
-    call  #0x4578               ; putchar ('\n')
+    mov.b #'\n', r15            ; '\n'
+    call  putchar               ; putchar ('\n')
 
 
 take_input:
     mov   #sr_len, r14
     mov   #iaddr, r15
-    call  getsn                 ; <getsn>
+    call  getsn                 ; getsn (iaddr, sr_len)
 
 check_all_passwords:
     ;for i in 0..sr_len:
     clr   r9
     pw_loop:
-        ; 	memcpy(kaddr, iaddr + i, len)
+        ; 	memcpy (kaddr, iaddr + i, len)
         mov   #0x10, r13
         mov   #iaddr, r14
         add   r9, r14
@@ -84,7 +82,7 @@ check_all_passwords:
         push  #0x42
         call  INT
         add   #4, sp
-        ; INT(7f)
+        ; INT (7f)
         unlock7f:
         push  #0
         push  #0

src/lexer.rs

@@ -5,7 +5,7 @@
 
 pub mod token;
 
-use self::token::{Special, TokenKind, *};
+use self::token::*;
 use crate::span::Span;
 use std::{
     iter::Peekable,

src/parser.rs

@@ -173,6 +173,10 @@ impl<'t> Parser<'t> {
                 self.take();
                 Expr::Number(n)
             }
+            Kind::Char(c) => {
+                self.take();
+                Expr::Number(c as _)
+            }
             Kind::Identifier => {
                 self.take();
                 Expr::Ident(lexeme)

src/parser/ast.rs

@@ -645,13 +645,12 @@ pub mod canonical {
                     Expr::Number(tail)
                 }
                 Expr::Binary(head, tails) => {
+                    let mut tails = tails.into_iter().map(|(op, tail)| (op, tail.to_canonical()));
                     let mut head = match head.to_canonical() {
                         Expr::Number(n) => n,
-                        head => return Expr::Binary(head.into(), tails),
+                        head => return Expr::Binary(head.into(), tails.collect()),
                     };
-                    let mut tails = tails.into_iter();
                     for (op, tail) in &mut tails {
-                        let tail = tail.to_canonical();
                         // If the canonical tail isn't a number, rebuild and return
                         let Expr::Number(tail) = tail else {
                             return Expr::Binary(