Support @staticmethod decorator for C++ classes.

Cython/Compiler/ExprNodes.py

@@ -5310,10 +5310,10 @@ class AttributeNode(ExprNode):
         # C method of an extension type or builtin type.  If successful,
         # creates a corresponding NameNode and returns it, otherwise
         # returns None.
-        type = self.obj.analyse_as_extension_type(env)
-        if type:
+        type = self.obj.analyse_as_type(env)
+        if type and (type.is_extension_type or type.is_builtin_type or type.is_cpp_class):
             entry = type.scope.lookup_here(self.attribute)
-            if entry and entry.is_cmethod:
+            if entry and (entry.is_cmethod or type.is_cpp_class and entry.type.is_cfunction):
                 if type.is_builtin_type:
                     if not self.is_called:
                         # must handle this as Python object
@@ -5326,6 +5326,9 @@ class AttributeNode(ExprNode):
                         cname = entry.func_cname
                         if entry.type.is_static_method:
                             ctype = entry.type
+                        elif type.is_cpp_class:
+                            error(self.pos, "%s not a static member of %s" % (entry.name, type))
+                            ctype = PyrexTypes.error_type
                         else:
                             # Fix self type.
                             ctype = copy.copy(entry.type)

Cython/Compiler/ModuleNode.py

@@ -826,7 +826,9 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
             has_virtual_methods = False
             has_destructor = False
             for attr in scope.var_entries:
-                if attr.type.is_cfunction and attr.name != "<init>":
+                if attr.type.is_cfunction and attr.type.is_static_method:
+                    code.put("static ")
+                elif attr.type.is_cfunction and attr.name != "<init>":
                     code.put("virtual ")
                     has_virtual_methods = True
                 if attr.cname[0] == '~':

Cython/Compiler/Nodes.py

@@ -1294,6 +1294,8 @@ class CVarDefNode(StatNode):
                 if self.entry is not None:
                     self.entry.is_overridable = self.overridable
                     self.entry.directive_locals = copy.copy(self.directive_locals)
+                if 'staticmethod' in env.directives:
+                    type.is_static_method = True
             else:
                 if self.directive_locals:
                     error(self.pos, "Decorators can only be followed by functions")
@@ -1361,6 +1363,9 @@ class CppClassNode(CStructOrUnionDefNode, BlockNode):
     #  entry         Entry
     #  base_classes  [CBaseTypeNode]
     #  templates     [string] or None
+    #  decorators    [DecoratorNode] or None
+
+    decorators = None
 
     def declare(self, env):
         if self.templates is None:
@@ -1394,15 +1399,22 @@ class CppClassNode(CStructOrUnionDefNode, BlockNode):
         if scope is not None:
             scope.type = self.entry.type
         defined_funcs = []
+        def func_attributes(attributes):
+            for attr in attributes:
+                if isinstance(attr, CFuncDefNode):
+                    yield attr
+                elif isinstance(attr, CompilerDirectivesNode):
+                    for sub_attr in func_attributes(attr.body.stats):
+                        yield sub_attr
         if self.attributes is not None:
             if self.in_pxd and not env.in_cinclude:
                 self.entry.defined_in_pxd = 1
             for attr in self.attributes:
                 attr.analyse_declarations(scope)
-                if isinstance(attr, CFuncDefNode):
-                    defined_funcs.append(attr)
-                    if self.templates is not None:
-                        attr.template_declaration = "template <typename %s>" % ", typename ".join(self.templates)
+            for func in func_attributes(self.attributes):
+                defined_funcs.append(func)
+                if self.templates is not None:
+                    func.template_declaration = "template <typename %s>" % ", typename ".join(self.templates)
         self.body = StatListNode(self.pos, stats=defined_funcs)
         self.scope = scope
 

Cython/Compiler/ParseTreeTransforms.py

@@ -951,11 +951,11 @@ class InterpretCompilerDirectives(CythonTransform, SkipDeclarations):
         for name, value in directives.iteritems():
             if name == 'locals':
                 node.directive_locals = value
-            elif name != 'final':
+            elif name not in ('final', 'staticmethod'):
                 self.context.nonfatal_error(PostParseError(
                     node.pos,
-                    "Cdef functions can only take cython.locals() "
-                    "or final decorators, got %s." % name))
+                    "Cdef functions can only take cython.locals(), "
+                    "staticmethod, or final decorators, got %s." % name))
         body = Nodes.StatListNode(node.pos, stats=[node])
         return self.visit_with_directives(body, directives)
 
@@ -966,6 +966,13 @@ class InterpretCompilerDirectives(CythonTransform, SkipDeclarations):
         body = Nodes.StatListNode(node.pos, stats=[node])
         return self.visit_with_directives(body, directives)
 
+    def visit_CppClassNode(self, node):
+        directives = self._extract_directives(node, 'cppclass')
+        if not directives:
+            return self.visit_Node(node)
+        body = Nodes.StatListNode(node.pos, stats=[node])
+        return self.visit_with_directives(body, directives)
+
     def visit_PyClassDefNode(self, node):
         directives = self._extract_directives(node, 'class')
         if not directives:

Cython/Compiler/Parsing.pxd

@@ -187,3 +187,4 @@ cdef p_doc_string(PyrexScanner s)
 cdef p_ignorable_statement(PyrexScanner s)
 cdef p_compiler_directive_comments(PyrexScanner s)
 cdef p_cpp_class_definition(PyrexScanner s, pos, ctx)
+def p_cpp_class_attribute(PyrexScanner s, ctx):

Cython/Compiler/Parsing.py

@@ -3231,12 +3231,8 @@ def p_cpp_class_definition(s, pos,  ctx):
         body_ctx = Ctx(visibility = ctx.visibility, level='cpp_class', nogil=nogil or ctx.nogil)
         body_ctx.templates = templates
         while s.sy != 'DEDENT':
-            if s.systring == 'cppclass':
-                attributes.append(
-                    p_cpp_class_definition(s, s.position(), body_ctx))
-            elif s.sy != 'pass':
-                attributes.append(
-                    p_c_func_or_var_declaration(s, s.position(), body_ctx))
+            if s.sy != 'pass':
+                attributes.append(p_cpp_class_attribute(s, body_ctx))
             else:
                 s.next()
                 s.expect_newline("Expected a newline")
@@ -3253,6 +3249,23 @@ def p_cpp_class_definition(s, pos,  ctx):
         attributes = attributes,
         templates = templates)
 
+def p_cpp_class_attribute(s, ctx):
+    decorators = None
+    if s.sy == '@':
+        decorators = p_decorators(s)
+    if s.systring == 'cppclass':
+        return p_cpp_class_definition(s, s.position(), ctx)
+    else:
+        node = p_c_func_or_var_declaration(s, s.position(), ctx)
+        if decorators is not None:
+            tup = Nodes.CFuncDefNode, Nodes.CVarDefNode, Nodes.CClassDefNode
+            if ctx.allow_struct_enum_decorator:
+                tup += Nodes.CStructOrUnionDefNode, Nodes.CEnumDefNode
+            if not isinstance(node, tup):
+                s.error("Decorators can only be followed by functions or classes")
+            node.decorators = decorators
+        return node
+
 
 #----------------------------------------------
 #

Cython/Compiler/PyrexTypes.py

@@ -3110,7 +3110,7 @@ class CppClassType(CType):
         # Need to do these *after* self.specializations[key] is set
         # to avoid infinite recursion on circular references.
         specialized.base_classes = [b.specialize(values) for b in self.base_classes]
-        specialized.scope = self.scope.specialize(values)
+        specialized.scope = self.scope.specialize(values, specialized)
         if self.namespace is not None:
             specialized.namespace = self.namespace.specialize(values)
         return specialized

Cython/Compiler/Symtab.py

@@ -2190,8 +2190,9 @@ class CppClassScope(Scope):
                                            utility_code = base_entry.utility_code)
             entry.is_inherited = 1
 
-    def specialize(self, values):
+    def specialize(self, values, type_entry):
         scope = CppClassScope(self.name, self.outer_scope)
+        scope.type = type_entry
         for entry in self.entries.values():
             if entry.is_type:
                 scope.declare_type(entry.name,

tests/run/cpp_classes_def.pyx

@@ -42,6 +42,21 @@ def test_Poly(int n, float radius=1):
         del poly
 
 
+cdef cppclass WithStatic:
+    @staticmethod
+    double square(double x):
+        return x * x
+
+def test_Static(x):
+    """
+    >>> test_Static(2)
+    4.0
+    >>> test_Static(0.5)
+    0.25
+    """
+    return WithStatic.square(x)
+
+
 cdef cppclass InitDealloc:
     __init__():
         print "Init"

tests/run/cpp_templates.pyx

@@ -22,6 +22,10 @@ cdef extern from "cpp_templates_helper.h":
     cdef cppclass SubClass[T2, T3](SuperClass[T2, T3]):
         pass
 
+    cdef cppclass Div[T]:
+        @staticmethod
+        T half(T value)
+
 def test_int(int x, int y):
     """
     >>> test_int(3, 4)
@@ -104,3 +108,12 @@ def test_cast_template_pointer():
 
     sup = sub
     sup = <SubClass[int, float] *> sub
+
+def test_static(x):
+    """
+    >>> test_static(2)
+    (1, 1.0)
+    >>> test_static(3)
+    (1, 1.5)
+    """
+    return Div[int].half(x), Div[double].half(x)

tests/run/cpp_templates_helper.h

@@ -30,3 +30,9 @@ public:
 template <class T2, class T3>
 class SubClass : public SuperClass<T2, T3> {
 };
+
+template <class T>
+class Div {
+public:
+    static T half(T value) { return value / 2; }
+};