// Private function for linear-gradient-parser @function _linear-angle-parser($image, $first-val, $prefix, $suffix) {

$offset: null;
$unit-short:  str-slice($first-val, str-length($first-val) - 2, str-length($first-val));
$unit-long:   str-slice($first-val, str-length($first-val) - 3, str-length($first-val));

@if ($unit-long == "grad") or
    ($unit-long == "turn") {
  $offset: if($unit-long == "grad", -100grad * 3, -0.75turn);
}

@else if ($unit-short == "deg") or
         ($unit-short == "rad") {
  $offset: if($unit-short == "deg", -90 * 3, 1.6rad);
}

@if $offset {
  $num: _str-to-num($first-val);

  @return (
    webkit-image: -webkit- + $prefix + ($offset - $num) + $suffix,
    spec-image: $image
  );
}

}