Managing concept properties in ConceptEvaluator

core/builtin_concepts.py

@@ -23,9 +23,13 @@ class BuiltinConcepts(Enum):
     INVALID_RETURN_VALUE = 14  # the return value of an evaluator is not correct
     BEFORE_PARSING = 15  # activated before evaluation by the parsers
     PARSING = 16  # activated during the parsing. It contains the text to parse
-    AFTER_PARSING = 17  # activated when the parsing process seems to be finished
-    CONCEPT_ALREADY_DEFINED = 18  # when you try to add the same concept twice
-    NOP = 19  # no operation concept. Does nothing
+    AFTER_PARSING = 17  # after parsing
+    BEFORE_EVALUATION = 18  # before evalution
+    EVALUATION = 19  # activated when the parsing process seems to be finished
+    AFTER_EVALUATION = 20  # activated when the parsing process seems to be finished
+    CONCEPT_ALREADY_DEFINED = 21  # when you try to add the same concept twice
+    NOP = 22  # no operation concept. Does nothing
+    PROPERTY_EVAL_ERROR = 23
 
 
 """
@@ -198,11 +202,34 @@ class BeforeParsingConcept(Concept):
         super().__init__(BuiltinConcepts.BEFORE_PARSING, True, True, BuiltinConcepts.BEFORE_PARSING)
 
 
-class ParsingConcept(Concept):
+class EvaluationConcept(Concept):
     def __init__(self):
-        super().__init__(BuiltinConcepts.PARSING, True, True, BuiltinConcepts.PARSING)
+        super().__init__(BuiltinConcepts.EVALUATION, True, True, BuiltinConcepts.EVALUATION)
 
 
-class AfterParsingConcept(Concept):
+class AfterEvaluationConcept(Concept):
     def __init__(self):
-        super().__init__(BuiltinConcepts.AFTER_PARSING, True, True, BuiltinConcepts.AFTER_PARSING)
+        super().__init__(BuiltinConcepts.AFTER_EVALUATION, True, True, BuiltinConcepts.AFTER_EVALUATION)
+
+
+class PropertyEvalError(Concept):
+    def __init__(self, property_name=None, concept=None, error=None):
+        super().__init__(BuiltinConcepts.PROPERTY_EVAL_ERROR, True, False, BuiltinConcepts.PROPERTY_EVAL_ERROR)
+        self.set_prop("concept", concept)
+        self.set_prop("error", error)
+        self.body = property_name
+
+    def __repr__(self):
+        return f"PropertyEvalError(property={self.property_name}, concept={self.concept}), error={self.error})"
+
+    @property
+    def concept(self):
+        return self.props["concept"].value
+
+    @property
+    def error(self):
+        return self.props["error"].value
+
+    @property
+    def property_name(self):
+        return self.body