Fixes CodeWriter for cdef functions aka. CFuncDefNode.

Signed-off-by: Tao He <linzhu.ht@alibaba-inc.com>

Cython/CodeWriter.py

@@ -136,7 +136,8 @@ def visit_CSimpleBaseTypeNode(self, node):
                 self.put("short " * -node.longness)
             elif node.longness > 0:
                 self.put("long " * node.longness)
-        self.put(node.name)
+        if node.name is not None:
+            self.put(node.name)
 
     def visit_CComplexBaseTypeNode(self, node):
         self.put(u'(')
@@ -247,10 +248,37 @@ def visit_FuncDefNode(self, node):
         self.visit(node.body)
         self.dedent()
 
+    def visit_CFuncDefNode(self, node):
+        if 'inline' in node.modifiers:
+            return
+        if node.overridable:
+            self.startline(u'cpdef ')
+        else:
+            self.startline(u'cdef ')
+        if node.visibility != 'private':
+            self.put(node.visibility)
+            self.put(u' ')
+        if node.api:
+            self.put(u'api ')
+
+        if node.base_type:
+            self.visit(node.base_type)
+            if node.base_type.name is not None:
+                self.put(u' ')
+
+        # visit the CFuncDeclaratorNode, but put a `:` at the end of line
+        self.visit(node.declarator.base)
+        self.put(u'(')
+        self.comma_separated_list(node.declarator.args)
+        self.endline(u'):')
+
+        self.indent()
+        self.visit(node.body)
+        self.dedent()
+
     def visit_CArgDeclNode(self, node):
         if node.base_type.name is not None:
             self.visit(node.base_type)
-            self.put(u" ")
         self.visit(node.declarator)
         if node.default is not None:
             self.put(u" = ")

Cython/Tests/TestCodeWriter.py

@@ -46,6 +46,14 @@ def f(x = 34, y = 54, z):
                         pass
                """)
 
+    def test_cdef(self):
+        self.t(u"""
+                    cdef f(x, y, z):
+                        pass
+                    cdef public void (x = 34, y = 54, z):
+                        pass
+               """)
+
     def test_longness_and_signedness(self):
         self.t(u"def f(unsigned long long long long long int y):\n    pass")