Fixed #68: Implement SheerkaQL

Fixed #70: SheerkaFilterManager : Pipe functions
Fixed #71: SheerkaFilterManager : filter_objects
Fixed #75: SheerkaMemory: Enhance memory() to use the filtering capabilities
Fixed #76: SheerkaEvaluateConcept: Concepts that modify the state of the system must not be evaluated during question

src/core/sheerka/services/SheerkaConceptManager.py

@@ -126,7 +126,8 @@ class SheerkaConceptManager(BaseService):
         self.sheerka.bind_service_method(self.get_by_name, False, visible=False)
         self.sheerka.bind_service_method(self.get_by_hash, False, visible=False)
         self.sheerka.bind_service_method(self.get_by_id, False, visible=False)
-        self.sheerka.bind_service_method(self.is_not_a_variable, False, visible=False)
+        self.sheerka.bind_service_method(self.is_not_a_concept_name, False, visible=False)
+        self.sheerka.bind_service_method(self.is_a_concept_name, False, visible=False)
         self.sheerka.bind_service_method(self.get_concepts_by_first_token, False, visible=False)
         self.sheerka.bind_service_method(self.get_concepts_by_first_regex, False, visible=False)
         self.sheerka.bind_service_method(self.get_concepts_bnf_definitions, False, visible=False)
@@ -705,7 +706,7 @@ class SheerkaConceptManager(BaseService):
 
         return refs
 
-    def is_not_a_variable(self, name):
+    def is_not_a_concept_name(self, name):
         """
         Given a name tells if it refers to a variable name
         :param name:
@@ -713,6 +714,14 @@ class SheerkaConceptManager(BaseService):
         """
         return self.sheerka.om.get(self.sheerka.CONCEPTS_BY_NAME_ENTRY, name) is NotFound
 
+    def is_a_concept_name(self, name):
+        """
+        Given a name tells if it refers to a variable name
+        :param name:
+        :return:
+        """
+        return self.sheerka.om.get(self.sheerka.CONCEPTS_BY_NAME_ENTRY, name) is not NotFound
+
     def clear_bnf_definition(self, concept_id=None):
         if concept_id:
             self.sheerka.om.delete(self.CONCEPTS_BNF_DEFINITIONS_ENTRY, concept_id)