added a test case for inter-module exchange of bound types

Author: wjakob

Diff for: .gitignore

@@ -6,6 +6,10 @@ libnanobind-abi3.so
 nanobind.dll
 nanobind-abi3.dll
 
+libinter_module.dylib
+libinter_module.so
+inter_module.dll
+
 /.ninja_deps
 /.ninja_log
 /build.ninja

Diff for: tests/CMakeLists.txt

@@ -19,6 +19,21 @@ nanobind_add_module(test_intrusive_ext test_intrusive.cpp object.cpp object.h ${
 nanobind_add_module(test_exception_ext test_exception.cpp object.cpp object.h ${NB_EXTRA_ARGS})
 nanobind_add_module(test_make_iterator_ext test_make_iterator.cpp ${NB_EXTRA_ARGS})
 
+add_library(
+  inter_module
+  SHARED
+  inter_module.h
+  inter_module.cpp
+)
+target_compile_definitions(inter_module PRIVATE -DSHARED_BUILD)
+nanobind_cpp17(inter_module)
+nanobind_headers(inter_module)
+
+nanobind_add_module(test_inter_module_1_ext test_inter_module_1.cpp ${NB_EXTRA_ARGS})
+nanobind_add_module(test_inter_module_2_ext test_inter_module_2.cpp ${NB_EXTRA_ARGS})
+target_link_libraries(test_inter_module_1_ext PRIVATE inter_module)
+target_link_libraries(test_inter_module_2_ext PRIVATE inter_module)
+
 set(TEST_FILES
   test_functions.py
   test_classes.py
@@ -29,6 +44,7 @@ set(TEST_FILES
   test_intrusive.py
   test_exception.py
   test_make_iterator.py
+  test_inter_module.py
 )
 
 if (NOT (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_CURRENT_BINARY_DIR) OR MSVC)

Diff for: tests/inter_module.cpp

@@ -0,0 +1,9 @@
+#include "inter_module.h"
+
+Shared create_shared() {
+    return { 123 };
+}
+
+bool check_shared(const Shared &shared) {
+    return shared.value == 123;
+}

Diff for: tests/inter_module.h

@@ -0,0 +1,14 @@
+#include <nanobind/nb_defs.h>
+
+#if defined(SHARED_BUILD)
+#  define EXPORT_SHARED NB_EXPORT
+#else
+#  define EXPORT_SHARED NB_IMPORT
+#endif
+
+struct EXPORT_SHARED Shared {
+    int value;
+};
+
+extern EXPORT_SHARED Shared create_shared();
+extern EXPORT_SHARED bool check_shared(const Shared &shared);

Diff for: tests/test_inter_module.py

@@ -0,0 +1,7 @@
+import test_inter_module_1_ext as t1
+import test_inter_module_2_ext as t2
+
+
+def test01_inter_module():
+    s = t1.create_shared()
+    assert t2.check_shared(s)

Diff for: tests/test_inter_module_1.cpp

@@ -0,0 +1,8 @@
+#include <nanobind/nanobind.h>
+#include "inter_module.h"
+
+namespace nb = nanobind;
+
+NB_MODULE(test_inter_module_1_ext, m) {
+    m.def("create_shared", &create_shared);
+}

Diff for: tests/test_inter_module_2.cpp

@@ -0,0 +1,9 @@
+#include <nanobind/nanobind.h>
+#include "inter_module.h"
+
+namespace nb = nanobind;
+
+NB_MODULE(test_inter_module_2_ext, m) {
+    nb::class_<Shared>(m, "Shared");
+    m.def("check_shared", &check_shared);
+}