public LiteValue Visit(SyntaxIndexElementsExpressionNode Node, LiteEnv Env)
{
var Val = Node.GetElementIdentNode().Accept(this, Env);
if (Val.Type == LiteValueType.Elements)
{
var EleObj = ElementsTable.GetElements((int)Val.Numeric);
if (EleObj == null)
{
Logger.DError($"bad elements access : {Val}");
return(LiteValue.Error);
}
var Idx = Node.GetIndexNode().Accept(this, Env);
if (Idx.Type != LiteValueType.Numeric)
{
Logger.DError($"elements index must be number");
return(LiteValue.Error);
}
return(EleObj.Get((int)Idx.Numeric));
}
else
{
Logger.DError($"unknown elements type : {Val}");
}
return(LiteValue.Error);
}
public LiteValue Visit(SyntaxAssignmentExpressionNode Node, LiteEnv Env)
{
var LeftNode = Node.GetLeft();
if (LeftNode.GetType() == SyntaxNodeType.Identifier)
{
var Ident = (LeftNode as SyntaxIdentifierNode).GetValue();
var Val = Node.GetRight().Accept(this, Env);
Env.Set(Ident, Val);
return(Val);
}
if (LeftNode.GetType() == SyntaxNodeType.DotClassExpression)
{
var DotNode = LeftNode as SyntaxDotClassExpressionNode;
var Mem = DotNode.GetCallIdentNode() as SyntaxIdentifierNode;
var LiteObjVal = DotNode.GetClassIdentNode().Accept(this, Env);
if (LiteObjVal.Type != LiteValueType.Object)
{
Logger.DError($"bad object access : {LiteObjVal}");
return(LiteValue.Error);
}
var LiteObj = ObjectTable.GetObject((int)LiteObjVal.Numeric);
if (LiteObj == null)
{
Logger.DError($"bad object access : {LiteObjVal}");
return(LiteValue.Error);
}
var ExpVal = Node.GetRight().Accept(this, Env);
if (ExpVal == LiteValue.Error)
{
return(ExpVal);
}
return(LiteObj.Write(Mem.GetValue(), ExpVal));
}
if (LeftNode.GetType() == SyntaxNodeType.IndexElementsExpression)
{
var IdxNode = LeftNode as SyntaxIndexElementsExpressionNode;
var Val = IdxNode.GetElementIdentNode().Accept(this, Env);
if (Val.Type == LiteValueType.Elements)
{
var EleObj = ElementsTable.GetElements((int)Val.Numeric);
if (EleObj == null)
{
Logger.DError($"bad elements access : {Val}");
return(LiteValue.Error);
}
var Idx = IdxNode.GetIndexNode().Accept(this, Env);
if (Idx.Type != LiteValueType.Numeric)
{
Logger.DError($"elements index must be number");
return(LiteValue.Error);
}
var ExpVal = Node.GetRight().Accept(this, Env);
if (ExpVal == LiteValue.Error)
{
return(ExpVal);
}
return(EleObj.Set((int)Idx.Numeric, ExpVal));
}
else
{
Logger.DError($"unknown elements type : {Val}");
}
}
Logger.DError($"unexpected '=' near {Node.GetLeft()}");
return(LiteValue.Error);
}