earth {
mammal, bird {
blood: warm;
}
}
earth {
mammal {
produces-milk: true;
}
}
@mixin mammal-says($message) {
@extend mammal;
says: $message;
}
dog {
@include mammal-says("Woof!");
}
cat {
@include mammal-says("Meow.");
}
horse, naysayer {
@include mammal-says("Nay.");
}
[hey] {
a: b;
}
ho {
@extend [hey];
c: d;
}
fancy outer space vehicle {
insides: advanced;
}
new american mars rover {
wheels: big;
@extend vehicle;
}
foo {
something: whatever;
}
a b c {
blah: blah;
@extend foo;
}
d e f {
blah: blah;
}
g {
@extend f;
bloo: bloo;
}