Refactored sheerka execution flow + Enhanced log management

evaluators/AddConceptEvaluator.py

@@ -5,12 +5,9 @@ from core.concept import Concept
 from evaluators.BaseEvaluator import OneReturnValueEvaluator
 from parsers.ConceptLexerParser import ParsingExpression, ParsingExpressionVisitor
 from parsers.DefaultParser import DefConceptNode
-import logging
 
 from parsers.PythonParser import PythonNode
 
-log = logging.getLogger(__name__)
-
 
 class ConceptOrRuleNameVisitor(ParsingExpressionVisitor):
     """
@@ -49,7 +46,7 @@ class AddConceptEvaluator(OneReturnValueEvaluator):
                isinstance(return_value.value.value, DefConceptNode)
 
     def eval(self, context, return_value):
-        log.debug("Adding a new concept")
+        context.log(self.log, "Adding a new concept", self.name)
         def_concept_node = return_value.value.value
         sheerka = context.sheerka
 
@@ -89,6 +86,9 @@ class AddConceptEvaluator(OneReturnValueEvaluator):
             concept.bnf = def_concept_node.definition.value.value
 
         ret = sheerka.create_new_concept(context, concept)
+        if not ret.status:
+            error_cause = sheerka.value(ret.body)
+            context.log(self.log, f"Failed to add concept '{concept.name}'. Reason: {error_cause}", self.name)
         return sheerka.ret(self.name, ret.status, ret.value, parents=[return_value])
 
     @staticmethod