public override object Visit(MethodNode obj)
{
object instance;
if (obj.Variable != null)
{
instance = obj.Variable.Accept(this);
}
else
{
instance = _ctx.Resolve("this");//Note:treat it as part of host class
}
string methodName = (obj.Method as SimpleNode).Token.TokenValue;
object[] paramArray = (object[])obj.Args.Accept(this);
if (instance == null)
{
ExceptionHelper.ThrowEvalNull();
}
ISmartInvoker invoker;
ClassDefination cdef = instance as ClassDefination;
if (cdef != null)
{
invoker = EvalSmartInvoker.CreateInstance(cdef.ObjType, false);
}
else
{
invoker = EvalSmartInvoker.CreateInstance(instance, true);
}
return(invoker.Invoke(methodName, paramArray));
}
public override object Visit(IndexerNode obj)
{
object instance = obj.Variable.Accept(this);
object[] paramArray = (object[])obj.Args.Accept(this);
if (instance == null)
{
ExceptionHelper.ThrowEvalNull();
}
ISmartInvoker invoker;
ClassDefination cdef = instance as ClassDefination;
if (cdef != null)
{
invoker = EvalSmartInvoker.CreateInstance(cdef.ObjType, false);
}
else
{
invoker = EvalSmartInvoker.CreateInstance(instance, true);
}
if (instance.GetType().IsArray)//Note:invoke "Get" on array
{
return(invoker.Invoke("Get", paramArray));
}
else//Note:invoke indexer on instance
{
try//Note:Try indexer first
{
return(invoker.Invoke("get_Item", paramArray));
}
catch//Note:then try property
{
if (paramArray.Length == 1 && paramArray[0] != null)
{
string propertyName = paramArray[0].ToString();
IReflector r = Reflector.Bind(instance);
if (r.ExistProperty(propertyName))
{
return(r.GetPropertyValue(propertyName));
}
else if (r.ExistField(propertyName))
{
return(r.GetFieldValue(propertyName));
}
else
{
ExceptionHelper.ThrowIndexOrPropertyNotExist(instance.GetType(), propertyName);
}
}
//Note:Can not convert to property, throw
throw;
}
}
}
public override object Visit(PropertyNode obj)
{
object instance = obj.Variable.Accept(this);
if (instance == null)
{
ExceptionHelper.ThrowEvalNull();
}
string propertyName = (obj.Property as SimpleNode).Token.TokenValue;
IReflector r;
ClassDefination cdef = instance as ClassDefination;
if (cdef != null)
{
r = Reflector.Bind(cdef.ObjType, ReflectorPolicy.CreateInstance(false, true, false, false));
}
else
{
r = Reflector.Bind(instance, ReflectorPolicy.CreateInstance(false, true, false, true));
}
if (r.ExistProperty(propertyName))//Note:Property first
{
return(r.GetPropertyValue(propertyName));
}
else if (r.ExistField(propertyName))//Note:Field 2nd
{
return(r.GetFieldValue(propertyName));
}
else//Note:Then try indexer
{
try
{
return(r.Invoke("get_Item", new object[] { propertyName }));
}
catch
{
//Note:Try indexer failed.
ExceptionHelper.ThrowIndexOrPropertyNotExist(instance.GetType(), propertyName);
return(null);
}
}
}
public override object Visit(UnaryNode obj)
{
object val = obj.OperandNode.Accept(this);
if (obj.Token.TokenValue == "!")
{
bool b = ScriptTypeUtil.EvalToBoolean(val);
return(!b);
}
if (val == null)
{
ExceptionHelper.ThrowEvalNull();
}
if (obj.Token.TokenValue == "+")
{
return(val);
}
if (obj.Token.TokenValue == "-")
{
if (ScriptTypeUtil.IsDecimal(val))
{
decimal result = ScriptTypeUtil.ConvertToDecimal(val);
return(-result);
}
if (ScriptTypeUtil.IsLong(val))
{
long result = ScriptTypeUtil.ConvertToLong(val);
return(-result);
}
}
ExceptionHelper.ThrowUnaryOperatorInvalid(obj.Token.TokenValue, val);
return(null);
}