From 69727bb3de59952fb8a34535b21fc5fa8eebe745 Mon Sep 17 00:00:00 2001
From: Egor Zhdan <e_zhdan@apple.com>
Date: Tue, 22 Aug 2023 16:51:02 +0100
Subject: [PATCH] [cxx-interop] Add test for `INADDR_ANY` usage

At some point several months ago the `INADDR_ANY` macro from `Darwin.POSIX` module was not imported into Swift correctly. The issue seems to be resolved now. This change adds a test to make sure we don't regress again.

rdar://107429566
---
 test/Interop/Cxx/objc-correctness/Inputs/POSIX.h         | 9 +++++++++
 .../Interop/Cxx/objc-correctness/Inputs/module.modulemap | 4 ++++
 test/Interop/Cxx/objc-correctness/posix.swift            | 6 ++++++
 3 files changed, 19 insertions(+)
 create mode 100644 test/Interop/Cxx/objc-correctness/Inputs/POSIX.h
 create mode 100644 test/Interop/Cxx/objc-correctness/posix.swift

diff --git a/test/Interop/Cxx/objc-correctness/Inputs/POSIX.h b/test/Interop/Cxx/objc-correctness/Inputs/POSIX.h
new file mode 100644
index 0000000000000..f52ab58d2769b
--- /dev/null
+++ b/test/Interop/Cxx/objc-correctness/Inputs/POSIX.h
@@ -0,0 +1,9 @@
+typedef unsigned int __uint32_t;
+typedef unsigned int u_int32_t;
+typedef __uint32_t in_addr_t;
+
+struct in_addr {
+  in_addr_t s_addr;
+};
+
+#define INADDR_ANY (u_int32_t)0x00000000
diff --git a/test/Interop/Cxx/objc-correctness/Inputs/module.modulemap b/test/Interop/Cxx/objc-correctness/Inputs/module.modulemap
index 005f2287098e1..03b14c92c6d2e 100644
--- a/test/Interop/Cxx/objc-correctness/Inputs/module.modulemap
+++ b/test/Interop/Cxx/objc-correctness/Inputs/module.modulemap
@@ -38,3 +38,7 @@ module NSTextCheckingResult {
   header "NSTextCheckingResult.h"
   requires objc
 }
+
+module MockPOSIX {
+  header "POSIX.h"
+}
diff --git a/test/Interop/Cxx/objc-correctness/posix.swift b/test/Interop/Cxx/objc-correctness/posix.swift
new file mode 100644
index 0000000000000..56ae3d326648b
--- /dev/null
+++ b/test/Interop/Cxx/objc-correctness/posix.swift
@@ -0,0 +1,6 @@
+// RUN: %target-swift-frontend -typecheck -verify -I %S/Inputs -cxx-interoperability-mode=swift-5.9 %s
+// REQUIRES: objc_interop
+
+import MockPOSIX
+
+let _ = in_addr(s_addr: INADDR_ANY)