Playing with proc macros

src/main.rs

@@ -1,15 +1,20 @@
 mod encoding;
 mod labels;
+mod peg;
 mod preprocess;
 mod world;
 
 use anyhow::anyhow;
 use labels::labels::print_labels;
+use peg_macro::grammar;
 use preprocess::eval::Context;
 use std::{env, error::Error, fs, path::PathBuf, process::exit};
 use world::World;
 
 fn main() -> Result<(), Box<dyn Error>> {
+    grammar!(123);
+    grammar!("abc");
+
     let args: Vec<String> = env::args().collect();
     if args.len() != 2 {
         eprintln!("Usage: {} WORLD_FILE", args[0]);

src/peg/mod.rs

@@ -0,0 +1,3 @@
+pub mod peg;
+
+pub use peg::*;

src/peg/peg.rs

@@ -0,0 +1,6 @@
+#[derive(Debug)]
+#[allow(dead_code)]
+pub enum Foo {
+    Bar(usize),
+    Baz(String),
+}