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-rw-r--r--absl/time/duration_test.cc61
-rw-r--r--absl/time/time.h48
-rw-r--r--absl/time/time_test.cc39
3 files changed, 148 insertions, 0 deletions
diff --git a/absl/time/duration_test.cc b/absl/time/duration_test.cc
index dcf7aad6..4c801a8d 100644
--- a/absl/time/duration_test.cc
+++ b/absl/time/duration_test.cc
@@ -19,6 +19,11 @@
#include <array>
#include <cfloat>
#include <chrono> // NOLINT(build/c++11)
+
+#ifdef __cpp_impl_three_way_comparison
+#include <compare>
+#endif // __cpp_impl_three_way_comparison
+
#include <cmath>
#include <cstdint>
#include <ctime>
@@ -431,6 +436,15 @@ TEST(Duration, InfinityComparison) {
EXPECT_LT(-inf, any_dur);
EXPECT_LT(-inf, inf);
EXPECT_GT(inf, -inf);
+
+#ifdef __cpp_impl_three_way_comparison
+ EXPECT_EQ(inf <=> inf, std::strong_ordering::equal);
+ EXPECT_EQ(-inf <=> -inf, std::strong_ordering::equal);
+ EXPECT_EQ(-inf <=> inf, std::strong_ordering::less);
+ EXPECT_EQ(inf <=> -inf, std::strong_ordering::greater);
+ EXPECT_EQ(any_dur <=> inf, std::strong_ordering::less);
+ EXPECT_EQ(any_dur <=> -inf, std::strong_ordering::greater);
+#endif // __cpp_impl_three_way_comparison
}
TEST(Duration, InfinityAddition) {
@@ -496,9 +510,20 @@ TEST(Duration, InfinitySubtraction) {
// Interesting case
absl::Duration almost_neg_inf = sec_min;
EXPECT_LT(-inf, almost_neg_inf);
+
+#ifdef __cpp_impl_three_way_comparison
+ EXPECT_EQ(-inf <=> almost_neg_inf, std::strong_ordering::less);
+ EXPECT_EQ(almost_neg_inf <=> -inf, std::strong_ordering::greater);
+#endif // __cpp_impl_three_way_comparison
+
almost_neg_inf -= -absl::Nanoseconds(1);
EXPECT_LT(-inf, almost_neg_inf);
+#ifdef __cpp_impl_three_way_comparison
+ EXPECT_EQ(-inf <=> almost_neg_inf, std::strong_ordering::less);
+ EXPECT_EQ(almost_neg_inf <=> -inf, std::strong_ordering::greater);
+#endif // __cpp_impl_three_way_comparison
+
// For reference: IEEE 754 behavior
const double dbl_inf = std::numeric_limits<double>::infinity();
EXPECT_TRUE(std::isnan(dbl_inf - dbl_inf)); // We return inf
@@ -857,6 +882,21 @@ TEST(Duration, Range) {
EXPECT_LT(neg_full_range, full_range);
EXPECT_EQ(neg_full_range, -full_range);
+
+#ifdef __cpp_impl_three_way_comparison
+ EXPECT_EQ(range_future <=> absl::InfiniteDuration(),
+ std::strong_ordering::less);
+ EXPECT_EQ(range_past <=> -absl::InfiniteDuration(),
+ std::strong_ordering::greater);
+ EXPECT_EQ(full_range <=> absl::ZeroDuration(), //
+ std::strong_ordering::greater);
+ EXPECT_EQ(full_range <=> -absl::InfiniteDuration(),
+ std::strong_ordering::greater);
+ EXPECT_EQ(neg_full_range <=> -absl::InfiniteDuration(),
+ std::strong_ordering::greater);
+ EXPECT_EQ(neg_full_range <=> full_range, std::strong_ordering::less);
+ EXPECT_EQ(neg_full_range <=> -full_range, std::strong_ordering::equal);
+#endif // __cpp_impl_three_way_comparison
}
TEST(Duration, RelationalOperators) {
@@ -880,6 +920,27 @@ TEST(Duration, RelationalOperators) {
#undef TEST_REL_OPS
}
+
+#ifdef __cpp_impl_three_way_comparison
+
+TEST(Duration, SpaceshipOperators) {
+#define TEST_REL_OPS(UNIT) \
+ static_assert(UNIT(2) <=> UNIT(2) == std::strong_ordering::equal, ""); \
+ static_assert(UNIT(1) <=> UNIT(2) == std::strong_ordering::less, ""); \
+ static_assert(UNIT(3) <=> UNIT(2) == std::strong_ordering::greater, "");
+
+ TEST_REL_OPS(absl::Nanoseconds);
+ TEST_REL_OPS(absl::Microseconds);
+ TEST_REL_OPS(absl::Milliseconds);
+ TEST_REL_OPS(absl::Seconds);
+ TEST_REL_OPS(absl::Minutes);
+ TEST_REL_OPS(absl::Hours);
+
+#undef TEST_REL_OPS
+}
+
+#endif // __cpp_impl_three_way_comparison
+
TEST(Duration, Addition) {
#define TEST_ADD_OPS(UNIT) \
do { \
diff --git a/absl/time/time.h b/absl/time/time.h
index d367ace2..f133c2d2 100644
--- a/absl/time/time.h
+++ b/absl/time/time.h
@@ -75,15 +75,22 @@
struct timeval;
#endif
#include <chrono> // NOLINT(build/c++11)
+
+#ifdef __cpp_impl_three_way_comparison
+#include <compare>
+#endif // __cpp_impl_three_way_comparison
+
#include <cmath>
#include <cstdint>
#include <ctime>
#include <limits>
#include <ostream>
+#include <ratio> // NOLINT(build/c++11)
#include <string>
#include <type_traits>
#include <utility>
+#include "absl/base/attributes.h"
#include "absl/base/config.h"
#include "absl/base/macros.h"
#include "absl/strings/string_view.h"
@@ -305,6 +312,14 @@ class Duration {
};
// Relational Operators
+
+#ifdef __cpp_impl_three_way_comparison
+
+ABSL_ATTRIBUTE_CONST_FUNCTION constexpr std::strong_ordering operator<=>(
+ Duration lhs, Duration rhs);
+
+#endif // __cpp_impl_three_way_comparison
+
ABSL_ATTRIBUTE_CONST_FUNCTION constexpr bool operator<(Duration lhs,
Duration rhs);
ABSL_ATTRIBUTE_CONST_FUNCTION constexpr bool operator>(Duration lhs,
@@ -837,6 +852,11 @@ class Time {
private:
friend constexpr Time time_internal::FromUnixDuration(Duration d);
friend constexpr Duration time_internal::ToUnixDuration(Time t);
+
+#ifdef __cpp_impl_three_way_comparison
+ friend constexpr std::strong_ordering operator<=>(Time lhs, Time rhs);
+#endif // __cpp_impl_three_way_comparison
+
friend constexpr bool operator<(Time lhs, Time rhs);
friend constexpr bool operator==(Time lhs, Time rhs);
friend Duration operator-(Time lhs, Time rhs);
@@ -848,6 +868,15 @@ class Time {
};
// Relational Operators
+#ifdef __cpp_impl_three_way_comparison
+
+ABSL_ATTRIBUTE_CONST_FUNCTION constexpr std::strong_ordering operator<=>(
+ Time lhs, Time rhs) {
+ return lhs.rep_ <=> rhs.rep_;
+}
+
+#endif // __cpp_impl_three_way_comparison
+
ABSL_ATTRIBUTE_CONST_FUNCTION constexpr bool operator<(Time lhs, Time rhs) {
return lhs.rep_ < rhs.rep_;
}
@@ -1723,6 +1752,25 @@ ABSL_ATTRIBUTE_CONST_FUNCTION constexpr bool operator<(Duration lhs,
: time_internal::GetRepLo(lhs) < time_internal::GetRepLo(rhs);
}
+
+#ifdef __cpp_impl_three_way_comparison
+
+ABSL_ATTRIBUTE_CONST_FUNCTION constexpr std::strong_ordering operator<=>(
+ Duration lhs, Duration rhs) {
+ const int64_t lhs_hi = time_internal::GetRepHi(lhs);
+ const int64_t rhs_hi = time_internal::GetRepHi(rhs);
+ if (auto c = lhs_hi <=> rhs_hi; c != std::strong_ordering::equal) {
+ return c;
+ }
+ const uint32_t lhs_lo = time_internal::GetRepLo(lhs);
+ const uint32_t rhs_lo = time_internal::GetRepLo(rhs);
+ return (lhs_hi == (std::numeric_limits<int64_t>::min)())
+ ? (lhs_lo + 1) <=> (rhs_lo + 1)
+ : lhs_lo <=> rhs_lo;
+}
+
+#endif // __cpp_impl_three_way_comparison
+
ABSL_ATTRIBUTE_CONST_FUNCTION constexpr bool operator==(Duration lhs,
Duration rhs) {
return time_internal::GetRepHi(lhs) == time_internal::GetRepHi(rhs) &&
diff --git a/absl/time/time_test.cc b/absl/time/time_test.cc
index 052d8806..71f54d64 100644
--- a/absl/time/time_test.cc
+++ b/absl/time/time_test.cc
@@ -24,6 +24,11 @@
#endif
#include <chrono> // NOLINT(build/c++11)
+
+#ifdef __cpp_impl_three_way_comparison
+#include <compare>
+#endif // __cpp_impl_three_way_comparison
+
#include <cstring>
#include <ctime>
#include <iomanip>
@@ -207,6 +212,22 @@ TEST(Time, RelationalOperators) {
static_assert(t3 >= t2, "");
static_assert(t1 >= t1, "");
static_assert(t3 >= t1, "");
+
+#ifdef __cpp_impl_three_way_comparison
+
+ static_assert((t1 <=> t1) == std::strong_ordering::equal, "");
+ static_assert((t2 <=> t2) == std::strong_ordering::equal, "");
+ static_assert((t3 <=> t3) == std::strong_ordering::equal, "");
+
+ static_assert((t1 <=> t2) == std::strong_ordering::less, "");
+ static_assert((t2 <=> t3) == std::strong_ordering::less, "");
+ static_assert((t1 <=> t3) == std::strong_ordering::less, "");
+
+ static_assert((t2 <=> t1) == std::strong_ordering::greater, "");
+ static_assert((t3 <=> t2) == std::strong_ordering::greater, "");
+ static_assert((t3 <=> t1) == std::strong_ordering::greater, "");
+
+#endif // __cpp_impl_three_way_comparison
}
TEST(Time, Infinity) {
@@ -218,6 +239,15 @@ TEST(Time, Infinity) {
static_assert(ipast < ifuture, "");
static_assert(ifuture > ipast, "");
+#ifdef __cpp_impl_three_way_comparison
+
+ static_assert((ifuture <=> ifuture) == std::strong_ordering::equal, "");
+ static_assert((ipast <=> ipast) == std::strong_ordering::equal, "");
+ static_assert((ipast <=> ifuture) == std::strong_ordering::less, "");
+ static_assert((ifuture <=> ipast) == std::strong_ordering::greater, "");
+
+#endif // __cpp_impl_three_way_comparison
+
// Arithmetic saturates
EXPECT_EQ(ifuture, ifuture + absl::Seconds(1));
EXPECT_EQ(ifuture, ifuture - absl::Seconds(1));
@@ -233,6 +263,15 @@ TEST(Time, Infinity) {
static_assert(t < ifuture, "");
static_assert(t > ipast, "");
+#ifdef __cpp_impl_three_way_comparison
+
+ static_assert((t <=> ifuture) == std::strong_ordering::less, "");
+ static_assert((t <=> ipast) == std::strong_ordering::greater, "");
+ static_assert((ipast <=> t) == std::strong_ordering::less, "");
+ static_assert((ifuture <=> t) == std::strong_ordering::greater, "");
+
+#endif // __cpp_impl_three_way_comparison
+
EXPECT_EQ(ifuture, t + absl::InfiniteDuration());
EXPECT_EQ(ipast, t - absl::InfiniteDuration());
}
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