Emit an error when typeid() is used outside of C++ mode (GH-3637)

Cython/Compiler/ExprNodes.py

@@ -10871,7 +10871,10 @@ class TypeidNode(ExprNode):
         typeinfo_entry = typeinfo_module.lookup('type_info')
         return PyrexTypes.CFakeReferenceType(PyrexTypes.c_const_type(typeinfo_entry.type))
 
+    cpp_message = 'typeid operator'
+
     def analyse_types(self, env):
+        self.cpp_check(env)
         type_info = self.get_type_info_type(env)
         if not type_info:
             self.error("The 'libcpp.typeinfo' module must be cimported to use the typeid() operator")

tests/errors/e_cpp_only_features.pyx

+# mode: error
+# tag: no-cpp, werror
+
+from cython.operator import typeid
+
+def use_typeid():
+    cdef int i = 0
+    print typeid(i) == typeid(i)
+
+cdef cppclass A:
+    pass
+
+def use_new():
+    cdef A* x = new A()
+
+def use_del():
+    cdef A a = A()
+    cdef A *p = &a
+    del p
+
+_ERRORS = """
+8:10: typeid operator only allowed in c++
+8:23: typeid operator only allowed in c++
+14:20: Operation only allowed in c++
+19:4: Operation only allowed in c++
+"""