void main()

{

    import std.algorithm.comparison : cmp;

    // Note that "a > b" is the reverse of the normal.

    static assert(cmp!"a > b"("1", "2") > 0);

    // Following fails because cmp is using the predicate "a > b"

    // to compare the lengths of the ranges.

    static assert(cmp!"a > b"("abc", "abcd") < 0,

                  `Should be negative because "abc" is a prefix of "abcd"!`);

}

​