public MyVoid VisitVarStmt(Stmt.Var stmt)
{
object value = null;
if (stmt.initializer != null)
{
value = Evaluate(stmt.initializer);
}
environment.Define(stmt.name.lexeme, value);
return(null);
}
public LoxFunction Bind(LoxInstance instance)
{
VariableEnvironment environment = new VariableEnvironment(closure);
environment.Define("this", instance);
return(new LoxFunction(declaration, environment, isInitializer));
}
public object Call(Interpreter interpreter, List <object> arguments)
{
VariableEnvironment environment = new VariableEnvironment(closure);
for (int i = 0; i < declaration.parameters.Count; i++)
{
environment.Define(declaration.parameters[i].lexeme, arguments[i]);
}
try
{
interpreter.ExecuteBlock(declaration.body, environment);
}
catch (Return returnValue)
{
// Allow an empty return ("return;") in a constructor. When this happens, return "this".
if (isInitializer)
{
return(closure.GetAt(0, "this"));
}
return(returnValue.value);
}
return(null);
}
public Interpreter()
{
this.globals = new VariableEnvironment();
this.environment = globals;
//Define built-in function to get the time in milliseconds
globals.Define("clock", new ClockFn());
}