STL support: add c++20 std::erase and std::erase_if functions

1 files changed, 44 insertions, 0 deletions

diff --git a/Utilities/std/cm/map b/Utilities/std/cm/map
new file mode 100644
index 0000000..e348dec
--- /dev/null
+++ b/Utilities/std/cm/map
@@ -0,0 +1,44 @@
+// -*-c++-*-
+// vim: set ft=cpp:
+
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#ifndef cm_map
+#define cm_map
+
+#include <map> // IWYU pragma: export
+
+#include <cm/bits/erase_if.hxx>
+
+namespace cm {
+
+// should be updated when C++20 is finalized
+#if (__cplusplus > 201703L ||                                                 \
+     (defined(_MSVC_LANG) && _MSVC_LANG > 201703)) &&                         \
+  defined(__cpp_lib_erase_if)
+
+using std::erase_if;
+
+#else
+
+template <typename Key, typename T, typename Compare, typename Allocator,
+          typename Predicate>
+inline void erase_if(std::map<Key, T, Compare, Allocator>& cont,
+                     Predicate pred)
+{
+  internals::erase_if(cont, pred);
+}
+
+template <typename Key, typename T, typename Compare, typename Allocator,
+          typename Predicate>
+inline void erase_if(std::multimap<Key, T, Compare, Allocator>& cont,
+                     Predicate pred)
+{
+  internals::erase_if(cont, pred);
+}
+
+#endif
+
+} // namespace cm
+
+#endif