reduce module issue

Author: usx95

module-reproducer/access_boundaries_test.cc

@@ -0,0 +1,6 @@
+#include "flume_test_utils.h"
+struct S {};
+
+void foo() {
+  N::Friend<S>({});
+}

module-reproducer/args.sh

@@ -0,0 +1,70 @@
+libA_pcm=$(mktemp)
+libB_pcm=$(mktemp)
+lib_core_pcm=$(mktemp)
+
+CLANG_BIN="/usr/local/google/home/usx/build/bin/clang++"
+
+${CLANG_BIN} \
+-fno-exceptions \
+-I . \
+-funsigned-char \
+-fnew-alignment=8 \
+-fcoro-aligned-allocation \
+-fmodule-name=lib_core \
+-Xclang=-fmodule-map-file-home-is-cwd \
+-xc++ \
+-Xclang=-emit-module \
+-pthread \
+-std=gnu++20 \
+-c \
+module-reproducer/lib_core.cppmap \
+-o \
+${lib_core_pcm} \
+&& \
+${CLANG_BIN} \
+-iquote \
+. \
+-fno-exceptions \
+-funsigned-char \
+-fnew-alignment=8 \
+-fcoro-aligned-allocation \
+-fmodule-name=libB \
+-Xclang=-fmodule-map-file-home-is-cwd \
+-xc++ \
+-Xclang=-emit-module \
+-Xclang=-fmodule-file=${lib_core_pcm} \
+-pthread \
+-std=gnu++20 \
+-c \
+module-reproducer/libB.cppmap \
+-o \
+${libB_pcm} \
+&& \
+${CLANG_BIN} \
+-fno-exceptions \
+-funsigned-char \
+-fnew-alignment=8 \
+-fcoro-aligned-allocation \
+-fmodule-name=libA \
+-Xclang=-fmodule-map-file-home-is-cwd \
+-xc++ \
+-Xclang=-emit-module \
+-Xclang=-fmodule-file=${libB_pcm} \
+-pthread \
+-std=gnu++20 \
+-c \
+module-reproducer/libA.cppmap \
+-o \
+${libA_pcm} \
+&& \
+${CLANG_BIN} \
+-iquote \
+. \
+-fno-exceptions \
+-funsigned-char \
+-fnew-alignment=8 \
+-fcoro-aligned-allocation \
+-Xclang=-fmodule-file=${libA_pcm} \
+-pthread \
+-std=gnu++20 \
+module-reproducer/access_boundaries_test.cc

module-reproducer/flume.h

@@ -0,0 +1,6 @@
+#ifndef FLUME_H_
+#define FLUME_H_
+
+#include "stream.h"
+
+#endif  // FLUME_H_

module-reproducer/flume_test_utils.h

@@ -0,0 +1,31 @@
+#ifndef FLUME_TEST_UTIL_H_
+#define FLUME_TEST_UTIL_H_
+
+// #include <string>
+#include <vector>
+
+template <typename T>
+class Stream;
+
+namespace N {
+template <typename T>
+std::vector<T> Friend(Stream<T> stream);
+}  // namespace N
+
+template <typename T>
+class Stream {
+  template <typename V>
+  friend std::vector<V> N::Friend(Stream<V> stream);
+};
+
+namespace N {
+
+template <typename T>
+std::vector<T> Friend(Stream<T> stream) {
+  std::vector<T> ret;
+  return ret;
+}
+
+}  // namespace N
+
+#endif  // FLUME_TEST_UTIL_H_

module-reproducer/libA.cppmap

@@ -0,0 +1,7 @@
+module "libA" {
+  export *
+  module "module-reproducer/flume_test_utils.h" {
+    export *
+    header "module-reproducer/flume_test_utils.h"
+  }
+}

module-reproducer/libB.cppmap

@@ -0,0 +1,11 @@
+module "libB" {
+  export *
+  module "module-reproducer/flume.h" {
+    export *
+    header "module-reproducer/flume.h"
+  }
+  module "module-reproducer/flume_test_utils.h" {
+    export *
+    header "module-reproducer/flume_test_utils.h"
+  }
+}

module-reproducer/lib_core.cppmap

@@ -0,0 +1,7 @@
+module "lib_core" {
+  export *
+  module "module-reproducer/stream.h" {
+    export *
+    header "module-reproducer/stream.h"
+  }
+}

module-reproducer/stream.h

@@ -0,0 +1,23 @@
+#ifndef STREAM_H_
+#define STREAM_H_
+
+#include <string>
+#include <vector>
+
+template <typename T>
+class Stream;
+
+namespace N {
+template <typename T>
+std::vector<T> Friend(Stream<T> stream);
+}  // namespace N
+
+template <typename T>
+class Stream {
+  template <typename V>
+  friend std::vector<V> N::Friend(Stream<V> stream);
+};
+
+Stream<std::string> Bar() { return Stream<std::string>(); }
+
+#endif  // STREAM_H_