Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.3.0.rc.3)
// Compass (v1.0.0.alpha.18)
// ----

// Mixins
@mixin icon($i) {
  @if $i == form {
		content: 'A';
	}
	@else if $i == people {
		content: 'x';
	}
}

@mixin icon-classes($icon, $collection: ()) {
	.icon-#{$icon}-before {
		&:before {
			@include icon($icon);

			@each $def in $collection {
				@if length($def) == 2 {
					#{nth($def,1)}: #{nth($def,2)};
				}
			}
		}
	}
	.icon-#{$icon}-after {
		&:after {
			@include icon($icon);
			
			@each $def in $collection {
				@if length($def) == 2 {
					#{nth($def,1)}: #{nth($def,2)};
				}
			}
		}
	}
}

// Create icon classes
@include icon-classes(form);
@include icon-classes(people, (margin-right 27px, background-image url('aol.com'), padding, text-shadow '1px 1px 1px #000'));

SassMeister-output.css

.icon-form-before:before {
  content: 'A';
}

.icon-form-after:after {
  content: 'A';
}

.icon-people-before:before {
  content: 'x';
  margin-right: 27px;
  background-image: url("aol.com");
  text-shadow: 1px 1px 1px #000;
}

.icon-people-after:after {
  content: 'x';
  margin-right: 27px;
  background-image: url("aol.com");
  text-shadow: 1px 1px 1px #000;
}