Add and test a generic "cppyy.default" object for use with builtin types

wlav · Jul 1, 2022 · 8ffb308 · 8ffb308
1 parent 711e2f6
commit 8ffb308
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diff --git a/doc/source/changelog.rst b/doc/source/changelog.rst
@@ -10,6 +10,12 @@ See :doc:`packages <packages>`, for details on the package structure.
 PyPy support lags CPython support.
 
 
+master: 2.5.0
+-------------
+
+* Added a generic "cppyy.default" object
+
+
 2022-06-29: 2.4.0
 -----------------
 

diff --git a/python/cppyy/_cpython_cppyy.py b/python/cppyy/_cpython_cppyy.py
@@ -10,6 +10,7 @@
     'addressof',
     'bind_object',
     'nullptr',
+    'default',
     '_backend',
     '_begin_capture_stderr',
     '_end_capture_stderr'
@@ -171,6 +172,7 @@ def add_default_paths():
 addressof     = _backend.addressof
 bind_object   = _backend.bind_object
 nullptr       = _backend.nullptr
+default       = _backend.default
 
 def load_reflection_info(name):
     sc = gbl.gSystem.Load(name)

diff --git a/test/test_datatypes.py b/test/test_datatypes.py
@@ -262,6 +262,18 @@ def test02_instance_data_write_access(self):
             getattr(c, 'set_'+names[i]+'_rv')(4*i)
             assert eval('c.m_%s' % names[i]) == 4*i
 
+        for i in range(len(names)):
+            setattr(c, 'm_'+names[i], cppyy.default)
+            assert eval('c.get_%s()' % names[i]) == 0
+
+        for i in range(len(names)):
+            getattr(c, 'set_'+names[i])(cppyy.default)
+            assert eval('c.m_%s' % names[i]) == 0
+
+        for i in range(len(names)):
+            getattr(c, 'set_'+names[i]+'_cr')(cppyy.default)
+            assert eval('c.m_%s' % names[i]) == 0
+
         # float types through functions
         c.set_float(0.123);   assert round(c.get_float()   - 0.123, 5) == 0
         c.set_double(0.456);  assert round(c.get_double()  - 0.456, 8) == 0
@@ -278,6 +290,19 @@ def test02_instance_data_write_access(self):
         c.set_ldouble(0.098);    assert round(c.m_ldouble     - 0.098, 8) == 0
         c.set_ldouble_cr(0.210); assert round(c.m_ldouble     - 0.210, 8) == 0
 
+        names = ['float', 'double', 'ldouble']
+        for i in range(len(names)):
+            setattr(c, 'm_'+names[i], cppyy.default)
+            assert eval('c.get_%s()' % names[i]) == 0.
+
+        for i in range(len(names)):
+            getattr(c, 'set_'+names[i])(cppyy.default)
+            assert eval('c.m_%s' % names[i]) == 0.
+
+        for i in range(len(names)):
+            getattr(c, 'set_'+names[i]+'_cr')(cppyy.default)
+            assert eval('c.m_%s' % names[i]) == 0.
+
         # (non-)writing of enum types
         raises(TypeError, setattr, CppyyTestData, 'kNothing', 42)