/// <summary>
/// Scans for all the grammar rules that are considered for the token at the specified text position.
/// </summary>
private Parser <LexicalToken> GetBestGrammarAtPosition(int position)
{
var offset = _code.GetTokenIndex(position);
var source = new ArraySource <LexicalToken>(_code.GetLexicalTokens());
Parser <LexicalToken> bestGrammar = null;
int bestLength = -1;
_code.Grammar.Search(source, (_parser, _source, _start, _prevWasMissing) =>
{
// capture the best grammar
if (_start == offset && _parser.Tag != null)
{
var scanLength = _parser.Scan(source, _start);
if (scanLength > bestLength)
{
bestGrammar = _parser;
bestLength = scanLength;
}
}
});
return(bestGrammar);
}
