public object VisitFunctionStmt(Stmt.Function stmt)
{
var function = new LoxFunction(stmt,
environment,
false);
environment.Define(stmt.Name.Lexeme, function);
return(null);
}
public object VisitClassStmt(Stmt.Class stmt)
{
object superclass = null;
if (stmt.Superclass != null)
{
superclass = Evaluate(stmt.Superclass);
if (!(superclass is LoxClass))
{
throw new InterpretingException(stmt.Superclass.Name,
"Superclass must be a class.");
}
}
environment.Define(stmt.Name.Lexeme, null);
if (stmt.Superclass != null)
{
environment = new Environment(environment);
environment.Define("super", superclass);
}
Dictionary <string, LoxFunction> methods = new Dictionary <string, LoxFunction>();
foreach (var method in stmt.Methods)
{
var function = new LoxFunction(method,
environment,
method.Name.Lexeme == stmt.Name.Lexeme);
methods[method.Name.Lexeme] = function;
}
var lclass = new LoxClass(stmt.Name.Lexeme,
(LoxClass)superclass,
methods);
if (stmt.Superclass != null)
{
environment = environment.Enclosing;
}
environment.Assign(stmt.Name, lclass);
return(null);
}
