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

1 files changed, 29 insertions, 0 deletions

diff --git a/Utilities/std/cm/bits/erase_if.hxx b/Utilities/std/cm/bits/erase_if.hxx
new file mode 100644
index 0000000..8952fb5
--- /dev/null
+++ b/Utilities/std/cm/bits/erase_if.hxx
@@ -0,0 +1,29 @@
+// -*-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_bits_erase_if_hxx
+#define cm_bits_erase_if_hxx
+
+namespace cm {
+namespace internals {
+
+template <typename Container, typename Predicate>
+void erase_if(Container& cont, Predicate pred)
+{
+  for (typename Container::iterator iter = cont.begin(), last = cont.end();
+       iter != last;) {
+    if (pred(*iter)) {
+      iter = cont.erase(iter);
+    } else {
+      ++iter;
+    }
+  }
+}
+
+} // namespace internals
+} // namespace cm
+
+#endif