[libcxx-commits] [libcxx] [libc++] Improve the test coverage for std::vector::emplace (PR #132440)

[Louis Dionne via libcxx-commits]

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@@ -7,150 +7,339 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: c++03 && !stdlib=libc++
+// ADDITIONAL_COMPILE_FLAGS(has-fconstexpr-steps): -fconstexpr-steps=9000000
 
 // <vector>
 
 // template <class... Args> iterator emplace(const_iterator pos, Args&&... args);
 
-#include <vector>
 #include <cassert>
+#include <cstddef>
+#include <type_traits>
+#include <utility>
+#include <vector>
 
-#include "test_macros.h"
-#include "test_allocator.h"
-#include "min_allocator.h"
 #include "asan_testing.h"
+#include "common.h"
+#include "min_allocator.h"
+#include "test_allocator.h"
+#include "test_macros.h"
 
-class A {
-  int i_;
-  double d_;
+struct NonCopyable {
+  int i;
 
-  A(const A&);
-  A& operator=(const A&);
+  TEST_CONSTEXPR_CXX14 explicit NonCopyable(int i) : i(i) {}
 
-public:
-  TEST_CONSTEXPR_CXX14 A(int i, double d) : i_(i), d_(d) {}
+  NonCopyable(NonCopyable const&)            = delete;
+  NonCopyable& operator=(NonCopyable const&) = delete;
 
-  TEST_CONSTEXPR_CXX14 A(A&& a) : i_(a.i_), d_(a.d_) {
-    a.i_ = 0;
-    a.d_ = 0;
-  }
+  TEST_CONSTEXPR_CXX14 NonCopyable(NonCopyable&& other) : i(other.i) { other.i = -1; }
----------------
ldionne wrote:

Re: `noexcept`, it's an oversight. Fixing both comments!

https://github.com/llvm/llvm-project/pull/132440