Equivalence testing using operator less?

Question

Say I have two literals of type T. I would like to check if they were equivalent, but type “T” has only the “less” operator. How can I test this in C ++?

Answer 1

You can emulate the equality operator with a pair of “less” comparisons and negatives:

if (!(t1 < t2) && !(t2 < t1)) { printf ("t1 and t2 are equivalent"); }