Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.3.0.rc.2)
// Compass (v1.0.0.alpha.17)
// ----

$px: 599px;
$em: 49.99em;


@function increment($number) {
    @return $number + 1 / exponent(10, precision($number));
}


@function precision($number) {
    @if is-float($number) {
        $number: #{strip-units($number)};
        // FIXME: make this >= 0 once https://github.com/nex3/sass/issues/1060 is closed
        @if str-index($number, ".") >= 1 {
            @return str-length($number) - str-index($number, ".");
        }
    }

    @return 0;
}

// Inspired by https://github.com/Team-Sass/Sassy-math/blob/master/sass/math.scss#L297
@function is-float($number) {
    @if type-of($number) == "number" and $number - floor($number) != 0 {
        @return true;
    }

    @warn "#{$number} is not a number!";
    @return false;
}

// Inspired by https://github.com/nex3/sass/issues/533#issuecomment-11675408
@function strip-units($number) {
    @return $number / ($number * 0 + 1);
}

// Inspired by https://github.com/Team-Sass/Sassy-math/blob/master/sass/math.scss#L36
@function exponent($base, $exponent) {
    $value: $base;

    // positive intergers get multiplied
    @if $exponent > 1 {
        @for $i from 2 through $exponent {
            $value: $value * $base;
        }
    }

    // negitive intergers get divided. A number divided by itself is 1
    @if $exponent < 1 {
        @for $i from 0 through -$exponent {
            $value: $value / $base;
        }
    }

    @return $value;
}

foo {
  px: precision($px);
  em: precision($em);
  px2: increment($px);
  em2: increment($em);
  foo: 1 / exponent(10, 2);
}

SassMeister-output.css

foo {
  px: 0;
  em: 2;
  px2: 600px;
  em2: 50em;
  foo: 0.01;
}