works

rust2/src/main.rs

@@ -1,8 +1,29 @@
-#![feature(allocator_api)]
+#![feature(allocator_api, let_else)]
 #![warn(rust_2018_idioms)]
 
+use bumpalo::Bump;
+use std::{env, fs, process};
+
+mod naive_interpreter;
 mod parse;
 
 fn main() {
-    println!("Hello, world!");
+    let Some(path) = env::args().nth(1) else {
+        eprintln!("error: Provide a path as input.");
+        process::exit(1);
+    };
+
+    let file = fs::read_to_string(path).unwrap_or_else(|err| {
+        eprintln!("error: Failed to read file: {err}");
+        process::exit(1);
+    });
+
+    let ast_alloc = Bump::new();
+
+    let parsed = parse::parse(&ast_alloc, file.bytes()).unwrap_or_else(|_| {
+        eprintln!("Failed to parse brainfuck code.");
+        process::exit(1);
+    });
+
+    naive_interpreter::run(&parsed);
 }