From: Marek Polacek <polacek@redhat.com>
Date: Wed, 17 Aug 2022 19:43:45 +0000 (-0400)
Subject: c++: Add new std::move test [PR67906]
X-Git-Tag: basepoints/gcc-14~5108
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=177e93e95272e9b373203dee5b28d2b284ffa05e;p=thirdparty%2Fgcc.git

c++: Add new std::move test [PR67906]

As discussed in 67906, let's make sure we don't warn about a std::move
when initializing when there's a T(const T&&) ctor.

	PR c++/67906

gcc/testsuite/ChangeLog:

	* g++.dg/cpp0x/Wredundant-move11.C: New test.
---

diff --git a/gcc/testsuite/g++.dg/cpp0x/Wredundant-move11.C b/gcc/testsuite/g++.dg/cpp0x/Wredundant-move11.C
new file mode 100644
index 000000000000..5dfa37f1686b
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/Wredundant-move11.C
@@ -0,0 +1,32 @@
+// PR c++/67906
+// { dg-do compile { target c++11 } }
+// { dg-options "-Wall -Wextra" }
+
+// Define std::move.
+namespace std {
+  template<typename _Tp>
+    struct remove_reference
+    { typedef _Tp   type; };
+
+  template<typename _Tp>
+    struct remove_reference<_Tp&>
+    { typedef _Tp   type; };
+
+  template<typename _Tp>
+    struct remove_reference<_Tp&&>
+    { typedef _Tp   type; };
+
+  template<typename _Tp>
+    constexpr typename std::remove_reference<_Tp>::type&&
+    move(_Tp&& __t) noexcept
+    { return static_cast<typename std::remove_reference<_Tp>::type&&>(__t); }
+}
+
+struct X {
+  X() { }
+  X(const X&) { }
+  X(const X&&) { }
+};
+
+const X x;
+const X y = std::move(x);