[rlox] Use fewer files

rlox/src/vm.rs

@@ -0,0 +1,36 @@
+use std::fmt;
+
+#[repr(u8)]
+#[derive(Debug)]
+pub enum Op {
+    Return
+}
+
+pub struct Chunk {
+    code: Vec<Op>,
+    name: String
+}
+
+impl Chunk {
+    pub fn new(name: String) -> Chunk {
+        Chunk {
+            code: Vec::new(),
+            name
+        }
+    }
+
+    pub fn add(&mut self, op: Op) {
+        self.code.push(op)
+    }
+}
+
+impl fmt::Debug for Chunk {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
+        writeln!(f, "-*-*- {} -*-*-", self.name)?;
+        for (idx, op) in self.code.iter().enumerate() {
+            write!(f, "{:04}  {:?}", idx, op)?;
+        }
+
+        return Ok(());
+    }
+}