declare C++ default constructor 'except +', fix constructor declarations in test

Cython/Compiler/ExprNodes.py

@@ -1329,7 +1329,7 @@ class NewExprNode(AtomicExprNode):
         self.cpp_check(env)
         constructor = type.scope.lookup(u'<init>')
         if constructor is None:
-            return_type = PyrexTypes.CFuncType(type, [])
+            return_type = PyrexTypes.CFuncType(type, [], exception_check='+')
             return_type = PyrexTypes.CPtrType(return_type)
             type.scope.declare_cfunction(u'<init>', return_type, self.pos)
             constructor = type.scope.lookup(u'<init>')

tests/run/cpp_classes.pyx

@@ -7,19 +7,19 @@ cdef extern from "shapes.h" namespace "shapes":
 
     cdef cppclass Circle(Shape):
         int radius
-        Circle(int)
+        Circle(int) except +
 
     cdef cppclass Rectangle(Shape):
         int width
         int height
-        Rectangle()
-        Rectangle(int, int)
+        Rectangle() except +
+        Rectangle(int, int) except +
         int method(int)
         int method(bint)
 
     cdef cppclass Square(Rectangle):
         int side
-        Square(int)
+        Square(int) except +
 
     cdef cppclass Empty(Shape):
         pass
@@ -39,6 +39,17 @@ def test_new_del():
     del rect, circ
     print constructor_count-c, destructor_count-d
 
+def test_default_constructor():
+    """
+    >>> test_default_constructor()
+    0.0
+    """
+    shape = new Empty()
+    try:
+        return shape.area()
+    finally:
+        del shape
+
 def test_rect_area(w, h):
     """
     >>> test_rect_area(3, 4)

tests/run/shapes.h

@@ -49,6 +49,7 @@ namespace shapes {
     };
 
     class Empty : public Shape {
+    public:
         float area() { return 0; }
     };