internal LinqOpChain BuildChain()
{
// PATTERN (Rule#1):
// q1 into x1 (q2 into x2 ( ... (qm into xm q)...))
//
// TRANSLATION:
// from x1 in ( q1 ), x2 in ( q2 ), ..., xm in ( qm )
// q
List <Generator> generators = new List <Generator>();
QueryBody query = this;
while (query.into != null)
{
LinqOpChain subquery_chain = query.BuildSingleQueryChain(new List <Generator>());
generators.Add(new Generator(Position.Invalid, subquery_chain, query.into.KeyVar, query.into.ValueVar));
query = query.into.NextQuery;
}
return(query.BuildSingleQueryChain(generators));
}
