public object VisitFunctionStatement(FunctionStatement statement)
{
var function = new LoxFunction(statement, environment);
environment.Define(statement.Name, function);
return(null);
}
public object VisitClassStatement(ClassStatement statement)
{
object superclass = null;
if (statement.Superclass != null)
{
superclass = Evaluate(statement.Superclass);
if (!(superclass is LoxClass))
{
throw new LoxRunTimeException(statement.Superclass.Name, "Superclass must be a class.");
}
}
environment.Define(statement.Name, null);
if (statement.Superclass != null)
{
environment = new Environment(environment);
environment.Define(superToken, superclass);
}
var methods = new Dictionary <string, LoxFunction>();
foreach (var method in statement.Methods)
{
var function = new LoxFunction(method, environment, LoxClass.IsInitializer(method));
methods.Add(method.Name.Lexeme, function);
}
var loxClass = new LoxClass(statement.Name.Lexeme, (LoxClass)superclass, methods);
if (superclass != null)
{
environment = environment.Enclosing;
}
environment.Assign(statement.Name, loxClass);
return(null);
}
