private static IEnumerable <TomlObject> ProcessArray(TomlObject obj, ReadOnlyMemory <char> pathM)
{
var path = pathM.Span;
if (path[0] != '[')
{
throw new ArgumentException("Expected array open breacket", nameof(pathM));
}
for (int i = 1; i < path.Length; i++)
{
if (path[i] == ']')
{
if (i == 0)
{
throw new ArgumentException("Empty array indexer", nameof(pathM));
}
var indexer = path.Slice(1, i - 1);
var rest = pathM.Slice(i + 1);
bool cont = rest.Length > 0;
// select
if (indexer.Length == 1 && indexer[0] == '*')
{
var ret = obj.GetAllArrayItems();
if (cont)
{
if (IsArray(rest.Span))
{
return(ret.SelectMany(x => ProcessArray(x, rest)));
}
else if (IsDot(rest.Span))
{
return(ret.SelectMany(x => ProcessDot(x, rest)));
}
else
{
throw new ArgumentException("Invalid expression after array indexer", nameof(pathM));
}
}
return(ret);
}
else
{
var ret = obj.GetArrayItemByIndex(indexer);
if (ret is null)
{
return(Enumerable.Empty <TomlObject>());
}
if (cont)
{
if (IsArray(rest.Span))
{
return(ProcessArray(ret, rest));
}
else if (IsDot(rest.Span))
{
return(ProcessDot(ret, rest));
}
else
{
throw new ArgumentException("Invalid expression after array indexer", nameof(pathM));
}
}
return(new[] { ret });
}
}
}
throw new ArgumentException("Missing array close bracket", nameof(pathM));
}
