int _GetPrimitiveHashCode(object obj)
{
switch (obj)
{
case null:
return(0);
case IEnumerable <object> e:
return(HashCodeEx.SequenceCombine(e.Select(_GetPrimitiveHashCode)));
case string s:
return(StringComparer.Ordinal.GetHashCode(s));
case Expression expr:
return(Visit(expr));
default:
return(obj.GetHashCode());
}
}
protected override int VisitNewArray(NewArrayExpression na) => HashCodeEx.SequenceCombine(na.Expressions.Select(Visit));
