src/fundamentals/rightrotatewithparent.js
/**
* -> https://en.wikipedia.org/wiki/Tree_rotation
*
* B A
* / \ / \
* A c -> a B
* / \ / \
* a b b c
*/
export default function rightrotatewithparent ( B ) {
var A;
A = B.left;
B.left = A.right;
A.right = B;
A.parent = B.parent;
B.left.parent = B;
B.parent = A;
return A;
}