// create a tuple from two tuples and two maps, second to fill in gaps
static internal T CreateByMap <T>(TupBase t1, IList <int> map1, TupBase t2, IList <int> map2)
where T : TupBase, new()
{
Logger.Assert(map1.Count == map2.Count);
//Logger.Assert(map1.Count(x => x < 0) >= 1);
return(CreateByMap <T>(t1.Values, map1, t2.Values, map2));
}
static internal T CreateByMap <T>(IList <object> values1, IList <int> map1, IList <object> values2, IList <int> map2)
where T : TupBase, new()
{
Logger.Assert(values2 == null || map1.Count == map2.Count);
return(TupBase.Create <T>(Enumerable
.Range(0, map1.Count)
.Select(x => map1[x] >= 0 ? values1[map1[x]] : values2[map2[x]])
.ToArray()));
}
// create a tuple from a tuple and a map and a value to replace the -1
static internal T CreateByMap <T>(TupBase tuple, IList <int> map, object newvalue)
where T : TupBase, new()
{
Logger.Assert(map.Count(x => x < 0) == 1);
return(TupBase.Create <T>(Enumerable
.Range(0, map.Count)
.Select(x => map[x] == -1 ? newvalue : tuple.Values[map[x]])
.ToArray()));
}