Generated by SassMeister.com.

SassMeister-input.scss

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

$debug: true;
$app-version: '0.200.0';

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

  // Result
  $result: 0;
  $divider: 0;
  $minus: false;

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


    @if $character == '-' {
      $minus: true;
    }

    @else if $character == '.' {
      $divider: 1;
    }

    @else {
      @if not $index {
        $result: if($minus, $result * -1, $result);
        @return _length($result, str-slice($string, $i));
      }

      $number: nth($numbers, $index);

      @if $divider == 0 {
        $result: $result * 10;
      }

      @else {
        // Move the decimal dot to the left
        $divider: $divider * 10;
        $number: $number / $divider;
      }

      $result: $result + $number;
    }
  }

  @return if($minus, $result * -1, $result);
}

/// Major revision of a version
/// @param {String} $version - Semver version (e.g. '1.0.0')
/// @returns {Number} Major revision
/// @example scss
///  _version-major('1.0.0') // 1
/// @private
@function _version-major($version) {
  @return number(str-slice($version, 0, str-index($version, '.') - 1));
}

/// Minor revision of a version
/// @param {String} $version - Semver version (e.g. '1.50.0')
/// @returns {Number} Minor revision
/// @example scss
///  _version-minor('1.50.0') // 50
/// @private
@function _version-minor($version) {
  $minor-patch: str-slice($version, str-index($version, '.') + 1, str-length($version));
  @return number(str-slice($minor-patch, 0, str-index($minor-patch, '.') - 1));
}

/// Patch revision of a version
/// @param {String} $version - Semver version (e.g. '1.50.25')
/// @returns {Number} Patch revision
/// @example scss
///  _version-patch('1.50.25') // 25
/// @private
@function _version-patch($version) {
  $minor-patch: str-slice($version, str-index($version, '.') + 1, str-length($version));
  @return number(str-slice($minor-patch, str-index($minor-patch, '.') + 1, str-length($minor-patch)));
}

/// Output code only until $app-version reaches $version
/// and signal its deprecation to developers
///
/// @requires $app-version
/// @param {String} $version - Semver-like version (e.g. '0.200.0')
@mixin deprecate($version) {
  @if type-of($version) != string {
    @error 'The parameter passed to deprecate() must be a String. Good: deprecate(\'0.1.0\') / Bad: deprecate(0.1.0).';
  }

  @if & {
    $parent: &;
    @if ($debug) {
      @warn '#{$parent} deprecated in version #{$version}. Current version: #{$app-version}';
    }
  }

  @if _version-major($version) > _version-major($app-version) {
    @content;
  } @else {
    @if _version-major($version) == _version-major($app-version) {
      @if _version-minor($version) > _version-minor($app-version) {
        @content;
      } @else {
        @if _version-minor($version) == _version-minor($app-version) {
          @if _version-patch($version) > _version-patch($app-version) {
            @content;
          }
        }
      }
    }
  }
}

.test {
  @include deprecate('1.0.0') {
    content: 'I am still useful';
  }
  @include deprecate('0.200.1') {
    content: 'I am still useful';
  }
  @include deprecate('0.199.0') {
    content: 'I am deprecated';
  }
}

SassMeister-output.css

.test {
  content: 'I am still useful';
  content: 'I am still useful';
}