private static void EvalVarSentense(ParseNode node, Enviroment enviroment,
EnviromentNode envNode)
{
envNode.Symbol = node.Nodes[1].Token.Text;
if (node.Nodes[2].Token.Type == TokenType.FUNCTION)
{
EnviromentNode resultNode = EvalDirectFunctionCall(node.Nodes[2], enviroment, envNode.Enviroment);
// before bind function result to a smbol, eval result node first
EvalDelayEvalBlock(resultNode);
if (resultNode.GrammerNode != null)
{
ParseNode result = resultNode.GrammerNode;
if (resultNode.ValueType != "lambda")
{
envNode.Type = GetTypeString(result.Nodes[2], null);
envNode.Value = GetValueOfLambda(result.Nodes[2]);
}
envNode.GrammerNode = result;
}
envNode.Enviroment = resultNode.Enviroment;
envNode.CopyValueFromNode(resultNode);
return;
}
else if (node.Nodes[2].Token.Type == TokenType.IFTHENELSE)
{
DelayEvalBlock block = new DelayEvalBlock(node.Nodes[2], enviroment);
envNode.AddDelayEvalBlock(block);
EvalDelayEvalBlock(envNode);
}
else if (node.Nodes[2].Token.Type == TokenType.LAMBDA)
{
envNode.GrammerNode = node;
envNode.Type = GetTypeString(node.Nodes[2], null);
envNode.Value = GetValueOfLambda(node.Nodes[2]);
envNode.ValueType = "lambda";
}
else if (node.Nodes[2].Token.Type == TokenType.DIGIT)
{
envNode.GrammerNode = null;
envNode.ValueType = "int";
envNode.IValue = Int32.Parse(node.Nodes[2].Token.Text);
}
else if (node.Nodes[2].Token.Type == TokenType.STRINGVAL)
{
envNode.GrammerNode = null;
envNode.ValueType = "string";
string tmp = node.Nodes[2].Token.Text;
envNode.SValue = tmp.Substring(1, tmp.Length - 2);
}
}