internal ParseResult(ParseResult original)
{
Parser = original.Parser;
TailError = original.TailError;
Index = original.Index;
Length = original.Length;
Error = original.Error;
Fatal = original.Fatal;
_children = original._children;
Input = original.Input;
}
internal ParseResult(ParseError e, bool fatal = true)
: this(e.Context, null)
{
Error = e;
Fatal = fatal;
}