public void VisitClassStmt(ClassStmt stmt)
{
environment.Define(stmt.Name.Lexeme, null);
object superClass = null;
if (stmt.SuperClass != null)
{
superClass = Evaluate(stmt.SuperClass);
if (!(superClass is LoxClass))
{
throw new RuntimeError(stmt.SuperClass.Name, "Superclass must be class.");
}
environment = new Environment(environment);
environment.Define("super", superClass);
}
var methods = new Dictionary <string, LoxFunction>();
foreach (var method in stmt.Methods)
{
var function = new LoxFunction(method, environment, method.Name.Lexeme.Equals("init"));
methods.Add(method.Name.Lexeme, function);
}
var klass = new LoxClass(stmt.Name.Lexeme, (LoxClass)superClass, methods);
if (stmt.SuperClass != null)
{
environment = environment.Enclosing;
}
environment.Assign(stmt.Name, klass);
}
public void VisitFunctionStmt(FunctionStmt stmt)
{
var function = new LoxFunction(stmt, environment, false);
environment.Define(stmt.Name.Lexeme, function);
}
