[libc++][test] Close LWG3018 and add tests

[huixie90]

No description provided.

[llvmbot]

@llvm/pr-subscribers-libcxx

Author: Hui (huixie90)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/93047.diff

2 Files Affected:

• (modified) libcxx/docs/Status/Cxx20Issues.csv (+1-1)
• (modified) libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp (+13)

diff --git a/libcxx/docs/Status/Cxx20Issues.csv b/libcxx/docs/Status/Cxx20Issues.csv
index db57b15256a62..969283613e955 100644
--- a/libcxx/docs/Status/Cxx20Issues.csv
+++ b/libcxx/docs/Status/Cxx20Issues.csv
@@ -191,7 +191,7 @@
 "","","","","",""
 "`1203 <https://wg21.link/LWG1203>`__","More useful rvalue stream insertion","Prague","|Complete|","12.0"
 "`2859 <https://wg21.link/LWG2859>`__","Definition of *reachable* in [ptr.launder] misses pointer arithmetic from pointer-interconvertible object","Prague","",""
-"`3018 <https://wg21.link/LWG3018>`__","``shared_ptr``\  of function type","Prague","",""
+"`3018 <https://wg21.link/LWG3018>`__","``shared_ptr``\  of function type","Prague","|Nothing To Do|",""
 "`3050 <https://wg21.link/LWG3050>`__","Conversion specification problem in ``chrono::duration``\  constructor","Prague","|Complete|","19.0","|chrono|"
 "`3141 <https://wg21.link/LWG3141>`__","``CopyConstructible``\  doesn't preserve source values","Prague","|Nothing to do|",""
 "`3150 <https://wg21.link/LWG3150>`__","``UniformRandomBitGenerator``\  should validate ``min``\  and ``max``\ ","Prague","|Complete|","13.0","|ranges|"
diff --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp
index 42225a4b0be7e..f9493c7dd4362 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp
@@ -76,6 +76,19 @@ static_assert(!std::is_constructible<std::shared_ptr<int[5]>, int*, bad_deleter>
 static_assert(!std::is_constructible<std::shared_ptr<int[5]>, int(*)[5], test_deleter<int>>::value, "");
 #endif
 
+int f() { return 5; }
+
+// https://cplusplus.github.io/LWG/issue3018
+// LWG 3018. shared_ptr of function type
+void test_function_type() {
+  bool deleter_called = false;
+  {
+    std::shared_ptr<int()> p(&f, [&deleter_called](int (*)()) { deleter_called = true; });
+    assert((*p)() == 5);
+  }
+  assert(deleter_called);
+}
+
 int main(int, char**)
 {
     {

[ldionne]

LGTM if the test passes once it does something :-)

[github-actions]

⚠️ C/C++ code formatter, clang-format found issues in your code. ⚠️

You can test this locally with the following command:

git-clang-format --diff 7d9634e527fe52bf20a9036be6e5771f8fc4de17 8fb8cc6236ad0ffed94b60f855c2610cffe918dd -- libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp

View the diff from clang-format here.

diff --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp
index 0f4aa0f5c0..8aa794dc28 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer_deleter.pass.cpp
@@ -143,6 +143,6 @@ int main(int, char**)
     }
 #endif // TEST_STD_VER >= 11
 
-  test_function_type();
-  return 0;
+    test_function_type();
+    return 0;
 }