@function _radial-positions-parser($gradient-pos) {
    $shape-size: nth($gradient-pos, 1);
    $pos: nth($gradient-pos, 2);
    $shape-size-spec: _shape-size-stripper($shape-size);

    $pre-spec: unquote(if($pos, "#{$pos}, ", null)) unquote(if($shape-size, "#{$shape-size},", null));
    $pos-spec: if($pos, "at #{$pos}", null);

    $spec: "#{$shape-size-spec} #{$pos-spec}";

    // Add comma
    @if ($spec != "  ") {
        $spec: "#{$spec},";
    }

    @return $pre-spec $spec;
}