Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.3.0.rc.2)
// Compass (v1.0.0.alpha.17)
// ----

@mixin o-hello-world($val: blue) {
  background-color: $val;
}

@function o-fizz-buzz($some-number, $another-number) {
  @return $some-number + $another-number;
}

@mixin oHelloWorld($val: blue) {
  @warn "oHelloWorld is deprecated, please use o-hello-world";
  @include o-hello-world($val);
}

@function oFizzBuzz($some-number, $another-number) {
  @warn "oFizzBuzz is deprecated, please use o-fizz-buzz";
  @return o-fizz-buzz($some-number, $another-number);
}

.camel-1 {
  @include oHelloWorld;
  width: oFizzBuzz(1, 2)em;
}

.hyphen-1 {
  @include o-hello-world;
  width: o-fizz-buzz(1, 2)em;
}

.camel-2 {
  @include oHelloWorld(orange);
}

.hyphen-2 {
  @include o-hello-world(orange);
}

SassMeister-output.css

.camel-1 {
  background-color: blue;
  width: 3 em;
}

.hyphen-1 {
  background-color: blue;
  width: 3 em;
}

.camel-2 {
  background-color: orange;
}

.hyphen-2 {
  background-color: orange;
}