Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.3.8)
// Compass (v1.0.0.alpha.19)
// ----

$values: (
  'font-size': 20px,
  'line-height': 24px,
  '--bold': (
    'font-weight': bold,
    'letter-spacing': -1px
  )
);

@mixin output-type-class($values) {
  .trafalgar {
    @include output-values($values)
  }
}

@mixin output-values($values) {

  @each $property, $value in $values {
    
    @if(type-of($value) == map) {
      
      // build modifier
      &#{$property} {
        @include output-values($value);
      }
      
      
    } @else {
      
      // output values
      #{$property}: $value;
      
      
    }
    
  }
  
}

@include output-type-class($values);

SassMeister-output.css

.trafalgar {
  font-size: 20px;
  line-height: 24px;
}
.trafalgar--bold {
  font-weight: bold;
  letter-spacing: -1px;
}