Fixed #29: Parsers: Implement parsing memoization

Fixed #77 : Parser: ShortTermMemoryParser should be called separately
Fixed #78 : Remove VariableNode usage
Fixed #79 : ConceptManager: Implement compile caching
Fixed #80 : SheerkaExecute : parsers_key is not correctly computed
Fixed #81 : ValidateConceptEvaluator : Validate concept's where and pre clauses right after the parsing
Fixed #82 : SheerkaIsAManager: isa() failed when the set as a body
Fixed #83 : ValidateConceptEvaluator : Support BNF and SYA Concepts
Fixed #84 : ExpressionParser: Implement the parser as a standard parser
Fixed #85 : Services: Give order to services
Fixed #86 : cannot manage smart_get_attr(the short, color)

src/evaluators/PythonEvaluator.py

@@ -79,7 +79,8 @@ class PythonEvaluator(OneReturnValueEvaluator):
         #   or if EVAL_QUESTION_REQUESTED is explicit
         # We need to disable the functions that may alter the state
         # It's a poor way to have source code security check
-        expression_only = context.in_context(BuiltinConcepts.EVAL_QUESTION_REQUESTED)
+        expression_only = context.in_context(BuiltinConcepts.EVAL_QUESTION_REQUESTED) or \
+                          context.in_context(BuiltinConcepts.VALIDATION_ONLY_REQUESTED)
 
         if not expression_only:
             attr_under_eval = context.get_parents(lambda ec: ec.action == BuiltinConcepts.EVALUATING_ATTRIBUTE)
@@ -92,6 +93,11 @@ class PythonEvaluator(OneReturnValueEvaluator):
             my_globals = self.get_globals(context, node, expression_only)
             debugger.debug_var("globals", my_globals)
         except MethodAccessError as ex:
+            # Quick and dirty,
+            # When VALIDATION_ONLY_REQUESTED is enabled, it's normal to have some NameError exceptions
+            if context.in_context(BuiltinConcepts.VALIDATION_ONLY_REQUESTED):
+                return sheerka.ret(self.name, False, BuiltinConcepts.METHOD_ACCESS_ERROR, parents=[return_value])
+
             eval_error = PythonEvalError(ex,
                                          node.source,
                                          traceback.format_exc() if get_trace_back else None,