Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.4.14)
// Compass (v1.0.3)
// ----

/// Trim `$string`
/// @param {String} $string - String to trim
/// @return {String}
@function trim($string) {
  @return str-slice(
    $string, 
    first-index($string, 'left'), 
    first-index($string, 'right')
  );
}

/// Find first char which is not a space
/// @param {String} $string - String
/// @param {String} $direction ['left'] - Either `left` or `right`
/// @return {Number}
@function first-index($string, $direction: 'left') {
  @for $i from 1 through str-length($string) {
    $index: if($direction == 'left', $i, -$i);
    
    @if str-slice($string, $index, $index) != ' ' {
      @return $index;
    }
  }
  
  @return 0;
}

@function clean-property($property) {
  $properties: ('skew', 'rotate', 'translate', 'scale');
  $property: trim($property);
  
  @each $prop in $properties {
    @if str-slice($property, 1, str-length($prop)) == $prop {
      @return unquote($prop);
    }
  }
  
  @return unquote($property);
}

@function clean-value($value) {
  $clean-value: '';
  
  @for $i from 1 through str-length($value) {
    $character: str-slice($value, $i, $i);
    $clean-value: $clean-value + if($character == ',', ' ', $character);
  }
  
  @return unquote(trim($clean-value));
}

@function clean-transforms($transforms) {
  $clean-transforms: ();
  
  @each $transform, $value in $transforms {
    $clean-transforms: map-merge($clean-transforms, (
      clean-property($transform): clean-value($value)
    ));
  }
  
  @return $clean-transforms;
}

@mixin explode-transforms($transforms) {
  $transforms: inspect($transforms);
  $transform-map: ();
  $current-mode: 'property';
  $current: (
    'property': '',
    'value': ''
  );
  
  @for $i from 1 through str-length($transforms) {
    $character: str-slice($transforms, $i, $i);
    
    @if ($character == '(') {
      $current-mode: 'value';
    } @else if ($character == ')') {
      $current-mode: 'property';
      $transform-map: map-merge($transform-map, (
        map-get($current, 'property'): map-get($current, 'value')
      ));
      $current: ('property': '', 'value': '');
    } @else {
      $current: map-merge($current, (
        $current-mode: map-get($current, $current-mode) + $character)
      );
    }
  }
  
  @each $transform, $value in clean-transforms($transform-map) {
    #{$transform}: $value;
  }
}

.foo {
  @include explode-transforms(translate3d(0, 0, 0) rotateZ(90deg) scale(50%, 50%));
}

SassMeister-output.css

.foo {
  translate: 0  0  0;
  rotate: 90deg;
  scale: 50%  50%;
}