AST - Added superclass field

src/ast.rs

@@ -37,6 +37,8 @@ pub struct ClassMemberDecl {
 pub struct ClassDecl {
     /// The token that represents the name of the class.
     pub name: Token,
+    /// The token indicating the name of the parent class, if any.
+    pub superclass: Option<Token>,
     /// The list of class members.
     pub members: Vec<ClassMemberDecl>,
 }

src/dumper.rs

@@ -95,7 +95,11 @@ fn dump_statement(dumper: &mut Dumper, stmt: &StmtNode) {
         }
 
         StmtNode::ClassDecl(decl) => {
-            dumper.add_line(format!("class {} {{", decl.name.lexeme));
+            dumper.add_line(format!("class {}", decl.name.lexeme));
+            if let Some(superclass) = &decl.superclass {
+                dumper.current_line().push_str(&format!(" < {}", superclass.lexeme));
+            }
+            dumper.current_line().push_str(" {");
             if !decl.members.is_empty() {
                 dumper.depth += 1;
                 for member in decl.members.iter() {

src/parser.rs

@@ -257,7 +257,11 @@ impl Parser {
         }
         self.consume(&TokenType::RightBrace, "'}' expected")?;
 
-        Ok(StmtNode::ClassDecl(ClassDecl { name, members }))
+        Ok(StmtNode::ClassDecl(ClassDecl {
+            name,
+            superclass: None,
+            members,
+        }))
     }
 
     /// Parse the following rule: