private void HandleJoinClause(QueryExpression node, JoinClauseExpression JoinExpr, int i)
{
var l1 = MakeLambda(_range, JoinExpr.Left);
var l2 = MakeLambda(JoinExpr.Identifier, JoinExpr.Right);
BlockExpression[] lambdas = { l1, l2, null };
if (i == node.Clauses.Count - 1 && node.Ending is SelectClauseExpression)
{
lambdas[2] = MakeLambda(_range, JoinExpr.Identifier, node.Ending.BaseExpr);
var join = MakeMethodCall("Join", JoinExpr.Container, lambdas);
Simplify(JoinExpr, join);
node.Ending = null;
}
else
{
var constructor = MakeTupleConstructor(_range, JoinExpr.Identifier, TupleDepth(JoinExpr));
lambdas[2] = MakeLambda(_range, JoinExpr.Identifier, constructor);
var join = MakeMethodCall("Join", JoinExpr.Container, lambdas);
Simplify(JoinExpr, join);
string name;
InjectTransparentIdentifier(node, i, TupleDepth(JoinExpr), _range, JoinExpr.Identifier, out name);
_range = new Declaration(name, null);
FromClause(node).Identifier = _range;
}
}
override public void OnJoinClauseExpression(JoinClauseExpression node)
{
if (node.DeclaredType)
{
var typ = node.Identifier.Type;
var gen = new GenericReferenceExpression(typ.LexicalInfo);
gen.GenericArguments.Add(typ);
gen.Target = new MemberReferenceExpression(node.Container, "Cast");
var inv = new MethodInvocationExpression(node.Container.LexicalInfo, gen);
node.Container = inv;
}
base.OnJoinClauseExpression(node);
}
