redBlackTree

import std.range : iota;

auto rbt1 = redBlackTree(0, 1, 5, 7);
auto rbt2 = redBlackTree!string("hello", "world");
auto rbt3 = redBlackTree!true(0, 1, 5, 7, 5);
auto rbt4 = redBlackTree!"a > b"(0, 1, 5, 7);
auto rbt5 = redBlackTree!("a > b", true)(0.1, 1.3, 5.9, 7.2, 5.9);

// also works with ranges
auto rbt6 = redBlackTree(iota(3));
auto rbt7 = redBlackTree!true(iota(3));
auto rbt8 = redBlackTree!"a > b"(iota(3));
auto rbt9 = redBlackTree!("a > b", true)(iota(3));