Fixed #125: SheerkaErrorManager

Fixed #135: Change services service priorities
Fixed #136: ErrorManager: Implement recognize_error
Fixed #137: BNFNodeParser : Error when parsing regex with sub parsers
Fixed #138: get_last_errors(): real errors sources are lost
Fixed #139: OneError return value removes the origin of the error
Fixed #140: Concept variables are not correctly handled when parsing sub expression
Fixed #143: Implement has_unknown_concepts()

tests/evaluators/test_OneErrorEvaluator.py

@@ -49,7 +49,8 @@ class TestOneErrorEvaluator(TestUsingMemoryBasedSheerka):
         res = evaluator.eval(context, return_values)
 
         assert not res.status
-        assert res.body == "evaluators.one error"
+        assert context.sheerka.isinstance(res.body, BuiltinConcepts.RETURN_VALUE)
+        assert res.body.body == "evaluators.one error"
         assert len(res.parents) == 4
 
     def test_unwanted_return_values_are_not_eaten(self):
@@ -71,7 +72,8 @@ class TestOneErrorEvaluator(TestUsingMemoryBasedSheerka):
         res = evaluator.eval(context, return_values)
 
         assert not res.status
-        assert res.body == "evaluators.one error"
+        assert context.sheerka.isinstance(res.body, BuiltinConcepts.RETURN_VALUE)
+        assert res.body.body == "evaluators.one error"
         assert len(res.parents) == 4
 
         assert a_successful_concept not in res.parents
@@ -89,7 +91,7 @@ class TestOneErrorEvaluator(TestUsingMemoryBasedSheerka):
         assert evaluator.matches(context, return_values)
         res = evaluator.eval(context, return_values)
         assert not res.status
-        assert res.body == false_1.body
+        assert res.body.body == false_1.body
         assert res.parents == return_values
 
         evaluator.reset()
@@ -97,7 +99,7 @@ class TestOneErrorEvaluator(TestUsingMemoryBasedSheerka):
         assert evaluator.matches(context, return_values)
         res = evaluator.eval(context, return_values)
         assert not res.status
-        assert res.body == filtered
+        assert res.body.body == filtered
         assert res.parents == return_values
 
         evaluator.reset()
@@ -105,5 +107,5 @@ class TestOneErrorEvaluator(TestUsingMemoryBasedSheerka):
         assert evaluator.matches(context, return_values)
         res = evaluator.eval(context, return_values)
         assert not res.status
-        assert res.body == false_1.body
+        assert res.body.body == false_1.body
         assert res.parents == return_values