Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.4.12)
// Compass (v1.0.3)
// ----

@mixin font-weight($keyword) {
	$conversion-map: (
	  thin: 100,
	  hairline: 100,
	  extra light: 200,
	  extralight: 200,
	  ultra light: 200,
	  ultralight: 200,
	  light: 300,
	  book: 300,
	  demi: 300,
	  normal: 400,
	  regular: 400,
	  medium: 500,
	  semi bold: 600,
	  semibold: 600,
	  demi bold: 600,
	  demibold: 600,
	  bold: 700,
	  extra bold: 800,
	  extrabold: 800,
	  ultra bold: 800,
	  ultrabold: 800,
	  black: 900,
	  heavy: 900,
	  fat: 900,
	  poster: 900,
	  extra black: 900,
	  extrablack: 900,
	  ultra black: 900,
	  ultrablack: 900
	);

	@if map-has-key($conversion-map, $keyword) {
		font-weight: map-get($conversion-map, $keyword);
	} @else {
		@error "Unsupported `font-weight` keyword `#{$keyword}`";
	}
}

.one-zero-zero {
  @include font-weight(thin);
  @include font-weight(hairline);
}

.two-zero-zero {
  @include font-weight(extra light);
  @include font-weight(extralight);
  @include font-weight(ultra light);
  @include font-weight(ultralight);
}

.three-zero-zero {
  @include font-weight(light);
  @include font-weight(book);
  @include font-weight(demi);
}

.four-zero-zero {
  @include font-weight(normal);
  @include font-weight(regular);
}

.five-zero-zero {
  @include font-weight(medium);
}

.six-zero-zero {
  @include font-weight(semi bold);
  @include font-weight(semibold);
  @include font-weight(demi bold);
  @include font-weight(demibold);
}

.seven-zero-zero {
  @include font-weight(bold);
}

.eight-zero-zero {
  @include font-weight(extra bold);
  @include font-weight(extrabold);
  @include font-weight(ultra bold);
  @include font-weight(ultrabold);
}

.nine-zero-zero {
  @include font-weight(black);
  @include font-weight(heavy);
  @include font-weight(fat);
  @include font-weight(poster);
  @include font-weight(extra black);
  @include font-weight(extrablack);
  @include font-weight(ultra black);
  @include font-weight(ultrablack);
}

SassMeister-output.css

.one-zero-zero {
  font-weight: 100;
  font-weight: 100;
}

.two-zero-zero {
  font-weight: 200;
  font-weight: 200;
  font-weight: 200;
  font-weight: 200;
}

.three-zero-zero {
  font-weight: 300;
  font-weight: 300;
  font-weight: 300;
}

.four-zero-zero {
  font-weight: 400;
  font-weight: 400;
}

.five-zero-zero {
  font-weight: 500;
}

.six-zero-zero {
  font-weight: 600;
  font-weight: 600;
  font-weight: 600;
  font-weight: 600;
}

.seven-zero-zero {
  font-weight: 700;
}

.eight-zero-zero {
  font-weight: 800;
  font-weight: 800;
  font-weight: 800;
  font-weight: 800;
}

.nine-zero-zero {
  font-weight: 900;
  font-weight: 900;
  font-weight: 900;
  font-weight: 900;
  font-weight: 900;
  font-weight: 900;
  font-weight: 900;
  font-weight: 900;
}