diff options
| author |  Marcin Kowalczyk <qrczak@google.com> | 2023-12-05 08:47:14 -0800 |
|---|---|---|
| committer |  Copybara-Service <copybara-worker@google.com> | 2023-12-05 08:48:09 -0800 |
| commit | f845e60acd880dbf07788a5a2c0dbad0f9c57231 (patch) | |
| tree | 004d2977ebac75185dc68e0e675a5fc6ef118ea0 /absl/types | |
| parent | 7b6c17e378224844d8663a410da2da5353b205b9 (diff) | |
Make `absl::{partial,weak,strong}_ordering` aliases for the `std::` ordering
types when they are available.
This makes them interchangeable in contexts known to be compiled as C++20.
This also makes `absl::` ordering types compatible with `<=>`, allowing to
unconditionally use `absl::` spelling for types but conditionally use `<=>`
when available.
PiperOrigin-RevId: 588085408
Change-Id: I1aa5247f0e31acbb838ee76829b7a13c74b0a94f
Diffstat (limited to 'absl/types')
| -rw-r--r-- | absl/types/BUILD.bazel | 1 | ||||
| -rw-r--r-- | absl/types/CMakeLists.txt | 1 | ||||
| -rw-r--r-- | absl/types/compare.h | 24 |
3 files changed, 26 insertions, 0 deletions
diff --git a/absl/types/BUILD.bazel b/absl/types/BUILD.bazel index 3d5cf012..31a5daa2 100644 --- a/absl/types/BUILD.bazel +++ b/absl/types/BUILD.bazel @@ -293,6 +293,7 @@ cc_library( copts = ABSL_DEFAULT_COPTS, linkopts = ABSL_DEFAULT_LINKOPTS, deps = [ + "//absl/base:config", "//absl/base:core_headers", "//absl/meta:type_traits", ], diff --git a/absl/types/CMakeLists.txt b/absl/types/CMakeLists.txt index 1adf3c72..024c2c39 100644 --- a/absl/types/CMakeLists.txt +++ b/absl/types/CMakeLists.txt @@ -284,6 +284,7 @@ absl_cc_library( COPTS ${ABSL_DEFAULT_COPTS} DEPS + absl::config absl::core_headers absl::type_traits PUBLIC diff --git a/absl/types/compare.h b/absl/types/compare.h index ab0543c0..3cf4a917 100644 --- a/absl/types/compare.h +++ b/absl/types/compare.h @@ -30,6 +30,17 @@ #ifndef ABSL_TYPES_COMPARE_H_ #define ABSL_TYPES_COMPARE_H_ +#include "absl/base/config.h" + +#ifdef ABSL_USES_STD_ORDERING + +#include <compare> // IWYU pragma: export +#include <type_traits> + +#include "absl/meta/type_traits.h" + +#else + #include <cstddef> #include <cstdint> #include <cstdlib> @@ -39,8 +50,19 @@ #include "absl/base/macros.h" #include "absl/meta/type_traits.h" +#endif + namespace absl { ABSL_NAMESPACE_BEGIN + +#ifdef ABSL_USES_STD_ORDERING + +using std::partial_ordering; +using std::strong_ordering; +using std::weak_ordering; + +#else + namespace compare_internal { using value_type = int8_t; @@ -419,6 +441,8 @@ ABSL_COMPARE_INLINE_INIT(strong_ordering, greater, #undef ABSL_COMPARE_INLINE_SUBCLASS_DECL #undef ABSL_COMPARE_INLINE_INIT +#endif // ABSL_USES_STD_ORDERING + namespace compare_internal { // We also provide these comparator adapter functions for internal absl use. |