Add empty ;-statement

src/ast.rs

@@ -278,6 +278,7 @@ pub enum Statement {
     Break,
     Label(Node<String>),
     GoTo(Node<String>),
+    Empty,
 }
 
 impl Parse for Statement {
@@ -451,6 +452,9 @@ impl Parse for Statement {
         } else if let Some(Token::Keyword(Keyword::GoTo)) = stream.peek() {
             stream.next();
             Ok(Self::GoTo(stream.parse()?))
+        } else if let Some(Token::Symbol(';')) = stream.peek() {
+            stream.next();
+            Ok(Self::Empty)
         } else {
             Err(stream.expecting_err("statement"))
         }

src/compile.rs

@@ -245,6 +245,7 @@ impl Statement {
             Statement::Break => HashSet::new(),
             Statement::Label(_) => HashSet::new(),
             Statement::GoTo(_) => HashSet::new(),
+            Statement::Empty => HashSet::new(),
         }
     }
 
@@ -652,6 +653,7 @@ impl Statement {
             Statement::Break => instructions.push(PreInstr::Break),
             Statement::Label(node) => instructions.push(PreInstr::Label(node.kind.clone())),
             Statement::GoTo(node) => instructions.push(PreInstr::GoTo(node.kind.clone())),
+            Statement::Empty => {}
         }
 
         for reg in 0..scope.register_counter.0 {