public Expression GenerateExpression(object tree)
{
Expression lastExpressionNode = null;
VariableList = new ExpressionVariableList();
var block = new List<Expression>();
lastExpressionNode = CompileStatementList(ChildNodes[0].ChildNodes);
////they all statement but, inside the statement held the tpe
//foreach (var statement in ChildNodes[0].ChildNodes)
//{
// if (statement.ChildNodes[0] is VariableDeclarationNode)
// {
// //var xx; // var is ChildNodes[0] , xx is ChildNodes[1]
// var declaration = (VariableDeclarationNode)statement.ChildNodes[0];
// VariableList.Add((ParameterExpression)declaration.GenerateExpression(statement.ChildNodes[0].ChildNodes[1]));
// }
// else if (statement.ChildNodes[0] is VariableAssignmentNode)
// {
// //xx=2+3; // xx os a variable token , = is a symbol token , expression
// var assignment = (VariableAssignmentNode)statement.ChildNodes[0];
// var expressionNode = (ExpressionNode) statement.ChildNodes[0].ChildNodes[2];
// var variableToken = (Token)statement.ChildNodes[0].ChildNodes[0];
// var expression1 = expressionNode.GenerateExpression(null);
// var expression2 = VariableList.Get(variableToken.Text);
// block.Add(assignment.GenerateExpression(new TwoExpressionsDto
// {
// Expression1 = expression1,
// Expression2 = expression2
// }));
// }
// else if (statement.ChildNodes[0] is ExpressionNode)
// {
// var expressionNode = (ExpressionNode) statement.ChildNodes[0];
// lastExpressionNode = expressionNode.GenerateExpression(null);
// }
// else if (statement.ChildNodes[0] is IfStatementNode)
// {
// var expressionNode = (IfStatementNode)statement.ChildNodes[0];
// block.Add(expressionNode.GenerateExpression(null));
// }
// else
// {
// Debug.WriteLine("Whaaaaaaaat how? it seems like you changed the grammer without changing the code");
// }
//}
if (lastExpressionNode != null)
{
block.Add(lastExpressionNode);
lastExpressionNode = Expression.Block(block);
var lambda = Expression.Lambda<Func<decimal?>>(Expression.Block(
VariableList.Select(q => (ParameterExpression) q.FirstExpression).ToArray(),
lastExpressionNode));
return lambda;
}
throw new Exception("there is no equations (expressions) in your code");
}
public Expression GenerateExpression(object tree)
{
Expression lastExpressionNode = null;
VariableList = new ExpressionVariableList();
var block = new List <Expression>();
lastExpressionNode = CompileStatementList(ChildNodes[0].ChildNodes);
////they all statement but, inside the statement held the tpe
//foreach (var statement in ChildNodes[0].ChildNodes)
//{
// if (statement.ChildNodes[0] is VariableDeclarationNode)
// {
// //var xx; // var is ChildNodes[0] , xx is ChildNodes[1]
// var declaration = (VariableDeclarationNode)statement.ChildNodes[0];
// VariableList.Add((ParameterExpression)declaration.GenerateExpression(statement.ChildNodes[0].ChildNodes[1]));
// }
// else if (statement.ChildNodes[0] is VariableAssignmentNode)
// {
// //xx=2+3; // xx os a variable token , = is a symbol token , expression
// var assignment = (VariableAssignmentNode)statement.ChildNodes[0];
// var expressionNode = (ExpressionNode) statement.ChildNodes[0].ChildNodes[2];
// var variableToken = (Token)statement.ChildNodes[0].ChildNodes[0];
// var expression1 = expressionNode.GenerateExpression(null);
// var expression2 = VariableList.Get(variableToken.Text);
// block.Add(assignment.GenerateExpression(new TwoExpressionsDto
// {
// Expression1 = expression1,
// Expression2 = expression2
// }));
// }
// else if (statement.ChildNodes[0] is ExpressionNode)
// {
// var expressionNode = (ExpressionNode) statement.ChildNodes[0];
// lastExpressionNode = expressionNode.GenerateExpression(null);
// }
// else if (statement.ChildNodes[0] is IfStatementNode)
// {
// var expressionNode = (IfStatementNode)statement.ChildNodes[0];
// block.Add(expressionNode.GenerateExpression(null));
// }
// else
// {
// Debug.WriteLine("Whaaaaaaaat how? it seems like you changed the grammer without changing the code");
// }
//}
if (lastExpressionNode != null)
{
block.Add(lastExpressionNode);
lastExpressionNode = Expression.Block(block);
var lambda = Expression.Lambda <Func <decimal?> >(Expression.Block(
VariableList.Select(q => (ParameterExpression)q.FirstExpression).ToArray(),
lastExpressionNode));
return(lambda);
}
throw new Exception("there is no equations (expressions) in your code");
}
