private bool ParsePath()

in src/Elastic.Apm/Libraries/Newtonsoft.Json/Linq/JsonPath/JPath.cs [88:175]
77 lines of code
29 McCabe index (conditional complexity)

		private bool ParsePath(List<PathFilter> filters, int currentPartStartIndex, bool query)
		{
			var scan = false;
			var followingIndexer = false;
			var followingDot = false;

			var ended = false;
			while (_currentIndex < _expression.Length && !ended)
			{
				var currentChar = _expression[_currentIndex];

				switch (currentChar)
				{
					case '[':
					case '(':
						if (_currentIndex > currentPartStartIndex)
						{
							var member = _expression.Substring(currentPartStartIndex, _currentIndex - currentPartStartIndex);
							if (member == "*") member = null;

							filters.Add(CreatePathFilter(member, scan));
							scan = false;
						}

						filters.Add(ParseIndexer(currentChar, scan));
						scan = false;

						_currentIndex++;
						currentPartStartIndex = _currentIndex;
						followingIndexer = true;
						followingDot = false;
						break;
					case ']':
					case ')':
						ended = true;
						break;
					case ' ':
						if (_currentIndex < _expression.Length) ended = true;
						break;
					case '.':
						if (_currentIndex > currentPartStartIndex)
						{
							var member = _expression.Substring(currentPartStartIndex, _currentIndex - currentPartStartIndex);
							if (member == "*") member = null;

							filters.Add(CreatePathFilter(member, scan));
							scan = false;
						}
						if (_currentIndex + 1 < _expression.Length && _expression[_currentIndex + 1] == '.')
						{
							scan = true;
							_currentIndex++;
						}
						_currentIndex++;
						currentPartStartIndex = _currentIndex;
						followingIndexer = false;
						followingDot = true;
						break;
					default:
						if (query && (currentChar == '=' || currentChar == '<' || currentChar == '!' || currentChar == '>' || currentChar == '|'
							|| currentChar == '&'))
							ended = true;
						else
						{
							if (followingIndexer) throw new JsonException("Unexpected character following indexer: " + currentChar);

							_currentIndex++;
						}
						break;
				}
			}

			var atPathEnd = _currentIndex == _expression.Length;

			if (_currentIndex > currentPartStartIndex)
			{
				var member = _expression.Substring(currentPartStartIndex, _currentIndex - currentPartStartIndex).TrimEnd();
				if (member == "*") member = null;
				filters.Add(CreatePathFilter(member, scan));
			}
			else
			{
				// no field name following dot in path and at end of base path/query
				if (followingDot && (atPathEnd || query)) throw new JsonException("Unexpected end while parsing path.");
			}

			return atPathEnd;
		}