iox-eclipse-iceoryx#282 Fix deprecated-copy warning

iceoryx_hoofs/include/iceoryx_hoofs/cxx/newtype.hpp

@@ -54,6 +54,14 @@ namespace cxx
 ///         //                 otherwise the code will not compile
 ///             using ThisType::ThisType;   // this makes all constructors of NewType available for Index
 ///             using ThisType::operator=;  // put the assignment operators in scope
+///
+///             // implement ctors and assignment operators when they are implemented by the base class
+///             // this is necessary pro prevent warnings from specific compilers
+///             Index() noexcept = default;
+///             Index(const Index&) noexcept = default;
+///             Index(Index&&) noexcept = default;
+///             Index& operator=(const Index&) noexcept = default;
+///             Index& operator=(Index&&) noexcept = default;
 ///     };
 ///
 ///     Index a(123), c(456);   // allowed since we are using the policy ConstructByValueCopy

iceoryx_hoofs/test/moduletests/test_cxx_newtype.cpp

@@ -30,6 +30,14 @@ struct Sut : public T
 {
     using T::T;
     using T::operator=; // bring all operator= into scope
+
+    // implement ctors and assignment operators when they are implemented by the base class
+    // this is necessary pro prevent warnings from specific compilers
+    Sut() noexcept = default;
+    Sut(const Sut&) noexcept = default;
+    Sut(Sut&&) noexcept = default;
+    Sut& operator=(const Sut&) noexcept = default;
+    Sut& operator=(Sut&&) noexcept = default;
 };
 
 static CompileTest compileTest(R"(
@@ -89,19 +97,8 @@ TEST(NewType, CopyAssignableDoesCompile)
     Sut<cxx::NewType<int, newtype::ConstructByValueCopy, newtype::CopyAssignable, newtype::Comparable>> a(491), b(492),
         c(423);
 
-    // Ignore false positive
-    // See: https://isocpp.org/wiki/faq/strange-inheritance#hiding-rule
-
-#if (__GNUC__ == 9 && (__GNUC_MINOR__ > 1 || (__GNUC_MINOR__ == 1 && __GNUC_PATCHLEVEL__ > 0)))
-
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wdeprecated-copy"
     b = a;
-#pragma GCC diagnostic pop
     EXPECT_TRUE(a == b);
-#else
-    // Test disabled.
-#endif
 }
 
 TEST(NewType, MoveConstructableDoesCompile)