Remove TotalOrdering from utils::Timestamp

Reviewers: teon.banek

Reviewed By: teon.banek

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D2646

src/utils/timestamp.hpp

@@ -8,7 +8,6 @@
 #include <fmt/format.h>
 
 #include "utils/exceptions.hpp"
-#include "utils/total_ordering.hpp"
 
 namespace utils {
 
@@ -17,7 +16,7 @@ class TimestampError : public StacktraceException {
   using StacktraceException::StacktraceException;
 };
 
-class Timestamp : public TotalOrdering<Timestamp> {
+class Timestamp final {
  public:
   Timestamp() : Timestamp(0, 0) {}
 
@@ -28,9 +27,6 @@ class Timestamp : public TotalOrdering<Timestamp> {
       throw TimestampError("Unable to construct from {}", time);
   }
 
-  Timestamp(const Timestamp &) = default;
-  Timestamp(Timestamp &&) = default;
-
   static Timestamp Now() {
     timespec time;
     clock_gettime(CLOCK_REALTIME, &time);
@@ -85,6 +81,22 @@ class Timestamp : public TotalOrdering<Timestamp> {
            (a.unix_time == b.unix_time && a.nsec < b.nsec);
   }
 
+  constexpr friend bool operator!=(const Timestamp &a, const Timestamp &b) {
+    return !(a == b);
+  }
+
+  constexpr friend bool operator<=(const Timestamp &a, const Timestamp &b) {
+    return a < b || a == b;
+  }
+
+  constexpr friend bool operator>(const Timestamp &a, const Timestamp &b) {
+    return !(a <= b);
+  }
+
+  constexpr friend bool operator>=(const Timestamp &a, const Timestamp &b) {
+    return !(a < b);
+  }
+
  private:
   std::tm time;