@function _radial-arg-parser($g1, $g2, $pos, $shape-size) {
    @each $value in $g1, $g2 {
        $first-val: nth($value, 1);
        $pos-type: type-of($first-val);
        $spec-at-index: null;

        // Determine if spec was passed to mixin
        @if type-of($value) == list {
            $spec-at-index: if(index($value, at), index($value, at), false);
        }
        @if $spec-at-index {
            @if $spec-at-index > 1 {
                @for $i from 1 through ($spec-at-index - 1) {
                    $shape-size: $shape-size nth($value, $i);
                }
                @for $i from ($spec-at-index + 1) through length($value) {
                    $pos: $pos nth($value, $i);
                }
            } @else if $spec-at-index == 1 {
                @for $i from ($spec-at-index + 1) through length($value) {
                    $pos: $pos nth($value, $i);
                }
            }
            $g1: null;
        }

            // If not spec calculate correct values
        @else {
            @if ($pos-type != color) or ($first-val != "transparent") {
                @if ($pos-type == number)
        or ($first-val == "center")
        or ($first-val == "top")
        or ($first-val == "right")
        or ($first-val == "bottom")
        or ($first-val == "left") {

                    $pos: $value;

                    @if $pos == $g1 {
                        $g1: null;
                    }
                } @else if ($first-val == "ellipse")
        or ($first-val == "circle")
        or ($first-val == "closest-side")
        or ($first-val == "closest-corner")
        or ($first-val == "farthest-side")
        or ($first-val == "farthest-corner")
        or ($first-val == "contain")
        or ($first-val == "cover") {

                    $shape-size: $value;

                    @if $value == $g1 {
                        $g1: null;
                    } @else if $value == $g2 {
                        $g2: null;
                    }
                }
            }
        }
    }
    @return $g1, $g2, $pos, $shape-size;
}