Implement allocator access utilities

test/allocator_soccc_test.cpp

@@ -0,0 +1,40 @@
+/*
+Copyright 2020 Glen Joseph Fernandes
+(glenjofe@gmail.com)
+
+Distributed under the Boost Software License, Version 1.0.
+(http://www.boost.org/LICENSE_1_0.txt)
+*/
+#include <boost/core/allocator_access.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+struct A1 {
+    A1(int v)
+        : value(v) { }
+
+    int value;
+};
+
+#if defined(BOOST_CORE_ALLOCATOR_DETECTION)
+struct A2 {
+    A2(int v)
+        : value(v) { }
+
+    A2 select_on_container_copy_construction() const {
+        return A2(value + 1);
+    }
+
+    int value;
+};
+#endif
+
+int main()
+{
+    BOOST_TEST_EQ(1,
+        boost::allocator_select_on_container_copy_construction(A1(1)).value);
+#if defined(BOOST_CORE_ALLOCATOR_DETECTION)
+    BOOST_TEST_EQ(2,
+        boost::allocator_select_on_container_copy_construction(A2(1)).value);
+#endif
+    return boost::report_errors();
+}