Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.2.19)
// Compass (v0.12.7)
// ----

@function linear-gradient($parameters...) {
  $return: linear-gradient;
  @each $parameter in $parameters {
    $return: append($return,$parameter, comma);
  }
  @return $return;
}

@mixin background-image($parameters) {
  @if nth($parameters,1) == linear-gradient {
    $webkit-return: ();
    @if nth(nth($parameters,2),1) == to {
      @for $i from 3 through length($parameters) {
       $webkit-return: append(nth($parameters,$i),$webkit-return, comma);
      }
    }
    @if nth(nth($parameters,2),2) == right {
       $webkit-return: append(left,$webkit-return, comma);
    }
    background-image: unquote('-webkit-linear-gradient(' + $webkit-return + ')');
    $standard-return: ();
    @for $i from 2 through length($parameters) {
      $standard-return: append($standard-return,nth($parameters,$i), comma);
    }
    background-image: unquote('linear-gradient(' + $standard-return + ')');
  }
  @else {
    background-image: $parameters;
  }
}

foo {
  @include background-image(linear-gradient(to right, red, green));
}

SassMeister-output.css

foo {
  background-image: -webkit-linear-gradient(left, green, red);
  background-image: linear-gradient(to right, red, green);
}