/// Finding the integer part of a stringified number
/// @access private
/// @param {String} $source  - string source
/// @param {Number} $pointer - current pointer
/// @return {List} new pointer, parsed number
@function _sc-find-integer($source, $pointer) {
  $source: to-lower-case($source);
  $length: str-length($source);
  $numbers: "0" "1" "2" "3" "4" "5" "6" "7" "8" "9";
  $result: 0;

  @while $pointer <= $length {
    $token: str-slice($source, $pointer, $pointer);
    $index: index($numbers, $token);

    @if $token == "-" {
      // @continue;
    }
    @else if $index {
      $result: $result * 10 + ($index - 1);
    }
    @else {
      @return $pointer, $result;
    }

    $pointer: $pointer + 1;
  }

  @return $pointer, $result;
}