Generated by SassMeister.com.

SassMeister-input.scss

// ----
// libsass (v3.2.5)
// ----

/// Very dummy implementation of spaceship operator (<=>) in Sass
/// which returns 1, -1 or 0 depending of the result of the comparison
/// between values $a and $b
/// @link https://wiki.php.net/rfc/combined-comparison-operator
/// @param {Number} $a - First value
/// @param {Number} $b - Second value
/// @return {Number} - 1, 0 or -1
@function spaceship($a, $b) {
  @if $a > $b { @return  1; }
  @if $a < $b { @return -1; }
  
  @return 0;
}

.foo {
  content: spaceship(42, 1337);
  content: spaceship(1337, 42);
  content: spaceship(42, 42);
}

SassMeister-output.css

.foo {
  content: -1;
  content: 1;
  content: 0;
}