Add std::remove_all_extends to HB STL library

Change-Id: I6fa0e9930a9d8340416ab3c775238f60931882d8
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/72688
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Christian R. Geddes <crgeddes@us.ibm.com>
Reviewed-by: Chen Du <duchen@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>

src/include/util/impl/type_remove.H

@@ -25,6 +25,8 @@
 #ifndef __UTIL_IMPL_TYPE_REMOVE_H
 #define __UTIL_IMPL_TYPE_REMOVE_H
 
+#include <stdint.h>
+
 namespace std
 {
     template <typename T> struct remove_const { typedef T type; };
@@ -52,6 +54,11 @@ namespace std
     template <typename T> struct remove_pointer<T* const volatile>
         { typedef T type; };
 
+    template<class T> struct remove_all_extents { typedef T type;};
+    template<class T> struct remove_all_extents<T[]>
+        { typedef typename remove_all_extents<T>::type type; };
+    template<class T, size_t N> struct remove_all_extents<T[N]>
+        { typedef typename remove_all_extents<T>::type type; };
 }
 
 #endif

src/usr/testcore/lib/remove_all_extents.H

@@ -0,0 +1,60 @@
+/* IBM_PROLOG_BEGIN_TAG                                                   */
+/* This is an automatically generated prolog.                             */
+/*                                                                        */
+/* $Source: src/usr/testcore/lib/remove_all_extents.H $                   */
+/*                                                                        */
+/* OpenPOWER HostBoot Project                                             */
+/*                                                                        */
+/* Contributors Listed Below - COPYRIGHT 2015,2019                        */
+/* [+] International Business Machines Corp.                              */
+/*                                                                        */
+/*                                                                        */
+/* Licensed under the Apache License, Version 2.0 (the "License");        */
+/* you may not use this file except in compliance with the License.       */
+/* You may obtain a copy of the License at                                */
+/*                                                                        */
+/*     http://www.apache.org/licenses/LICENSE-2.0                         */
+/*                                                                        */
+/* Unless required by applicable law or agreed to in writing, software    */
+/* distributed under the License is distributed on an "AS IS" BASIS,      */
+/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or        */
+/* implied. See the License for the specific language governing           */
+/* permissions and limitations under the License.                         */
+/*                                                                        */
+/* IBM_PROLOG_END_TAG                                                     */
+#ifndef __LIB_REMOVE_ALL_EXTENTS_H
+#define __LIB_REMOVE_ALL_EXTENTS_H
+
+#include <cxxtest/TestSuite.H>
+#include <type_traits>
+
+class STLRemoveAllExtentsTest : public CxxTest::TestSuite
+{
+    public:
+        void testRemoveAllExtents()
+        {
+            // Leveraging std::is_same, which has already been unit tested
+	    {
+              using test_type = std::remove_all_extends<uint8_t>::type;
+              TS_ASSERT(std::is_same<uint8_t, test_type>::value);
+            }
+
+            {
+              using test_type = std::remove_all_extends<uint16_t[ ][ ][ ]>::type;
+              TS_ASSERT(std::is_same<uint16_t, test_type>::value);
+            }
+
+            {
+              using test_type = std::remove_all_extends<uint32_t[ ]>::type;
+              TS_ASSERT(std::is_same<uint32_t, test_type>::value);
+            }
+
+            {
+              using test_type = std::remove_all_extends<int[ ][ ]>::type;
+              TS_ASSERT(std::is_same<int, test_type>::value);
+            }
+
+	}
+};
+
+#endif