Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.4.12)
// Compass (v1.0.3)
// ----

/*! ========================================================================

    QUANTITY QUERIES FOR SASS
    -------------------------
    Author: Indrek Paas <@indrekpaas>

    Inspired by Heydon Pickering's Quantity Queries for CSS
    http://alistapart.com/article/quantity-queries-for-css

    `number()` function by Hugo Giraudel

    ========================================================================  */


@mixin qty($expr) {

  // Convert `$expr` to a string to allow parsing 
  // of `type-of($expr) == number`
  $expr: $expr + unquote("");


  // Iterate through `$expr` operators
  @if str-slice($expr, 1, 1) == "<" {
    @if str-slice($expr, 2, 2) == "=" {
      // Fewer than or equal to N
      $expr: number(str-slice($expr, 3));
      &:nth-last-child(-n+#{$expr}):first-child,
      &:nth-last-child(-n+#{$expr}):first-child ~ & {
        @content;
      }
    } @else {
      // Fewer than N
      $expr: number(str-slice($expr, 2));
      &:nth-last-child(-n+#{$expr - 1}):first-child,
      &:nth-last-child(-n+#{$expr - 1}):first-child ~ & {
        @content;
      }
    }
  } @else if str-slice($expr, 1, 1) == ">" {
    @if str-slice($expr, 2, 2) == "=" {
      // More than or equal to N
      $expr: number(str-slice($expr, 3));
      &:nth-last-child(n+#{$expr}),
      &:nth-last-child(n+#{$expr}) ~ & {
        @content;
      }
    } @else {
      // More than N
      $expr: number(str-slice($expr, 2));
      &:nth-last-child(n+#{$expr + 1}),
      &:nth-last-child(n+#{$expr + 1}) ~ & {
        @content;
      }
    }
  } @else {
    // Quantity N
    $expr: number($expr);
    &:nth-last-child(#{$expr}):first-child,
    &:nth-last-child(#{$expr}):first-child ~ & {
      @content;
    }
  }
  
}




@function number($string) {
  $strings: '0' '1' '2' '3' '4' '5' '6' '7' '8' '9';
  $numbers:  0   1   2   3   4   5   6   7   8   9;

  $result: 0;

  @for $i from 1 through str-length($string) {
    $character: str-slice($string, $i, $i);
    $index: index($strings, $character);

    @if not $index {
      @warn "Unknown character `#{$character}`.";
      @return false;
    }

    $number: nth($numbers, $index);
    $result: $result * 10 + $number;
  }

  @return $result;
}




div {

  @include qty(8) {
    /* Quantity N */
  }

  @include qty("<8") {
    /* Fewer than N */
  }

  @include qty("<=8") {
    /* Fewer than or equal to N */
  }

  @include qty(">8") {
    /* More than N */
  }

  @include qty(">=8") {
    /* More than or equal to N */
  }
}

SassMeister-output.css

/*! ========================================================================

    QUANTITY QUERIES FOR SASS
    -------------------------
    Author: Indrek Paas <@indrekpaas>

    Inspired by Heydon Pickering's Quantity Queries for CSS
    http://alistapart.com/article/quantity-queries-for-css

    `number()` function by Hugo Giraudel

    ========================================================================  */
div:nth-last-child(8):first-child, div:nth-last-child(8):first-child ~ div {
  /* Quantity N */
}
div:nth-last-child(-n+7):first-child, div:nth-last-child(-n+7):first-child ~ div {
  /* Fewer than N */
}
div:nth-last-child(-n+8):first-child, div:nth-last-child(-n+8):first-child ~ div {
  /* Fewer than or equal to N */
}
div:nth-last-child(n+9), div:nth-last-child(n+9) ~ div {
  /* More than N */
}
div:nth-last-child(n+8), div:nth-last-child(n+8) ~ div {
  /* More than or equal to N */
}