public override Snippets ParseFragment(Position begin, Position end)
{
var result = _grammar.Expression(begin.Constrain(end));
var unparsedLength = result.Rest.PotentialLength();
if (unparsedLength == 0)
{
return(result.Value);
}
var snippets = new Snippets(result.Value);
snippets.Add(new Snippet
{
Value = result.Rest.Peek(unparsedLength),
Begin = result.Rest,
End = result.Rest.Advance(unparsedLength)
});
return(snippets);
}