l-item-left,\n.carousel-fade .carousel-item-prev.carousel-item-right {\n  z-index: 1;\n  opacity: 1;\n}\n\n.carousel-fade .active.carousel-item-left,\n.carousel-fade .active.carousel-item-right {\n  z-index: 0;\n  opacity: 0;\n  transition: opacity 0s 0.6s;\n}\n\n@media (prefers-reduced-motion: reduce) {\n  .carousel-fade .active.carousel-item-left,\n  .carousel-fade .active.carousel-item-right {\n    transition: none;\n  }\n}\n\n.carousel-control-prev,\n.carousel-control-next {\n  position: absolute;\n...

ousel-item-start,\n.carousel-fade .carousel-item-prev.carousel-item-end {\n  z-index: 1;\n  opacity: 1;\n}\n.carousel-fade .active.carousel-item-start,\n.carousel-fade .active.carousel-item-end {\n  z-index: 0;\n  opacity: 0;\n  transition: opacity 0s 0.6s;\n}\n@media (prefers-reduced-motion: reduce) {\n  .carousel-fade .active.carousel-item-start,\n  .carousel-fade .active.carousel-item-end {\n    transition: none;\n  }\n}\n\n.carousel-control-prev,\n.carousel-control-next {\n  position: absolute;\n...

We use an int instead of bool in order to make decisions in // constant time by turning it into a mask. type choice uint func not(c choice) choice { return 1 ^ c } const yes = choice(1) const no = choice(0) // ctMask is all 1s if on is yes, and all 0s otherwise. func ctMask(on choice) uint { return -uint(on) } // ctEq returns 1 if x == y, and 0 otherwise. The execution time of this // function does not depend on its inputs. func ctEq(x, y uint) choice { // If x != y, then either x - y or y - x will...