Fixed #101 : Implement PLURIAL

Fixed #103 : Implement PlurialNodeParser
Fixed #104 : Implement dynamic concept
Fixed #107 : PrepareEvalxxxEvaluator: context hints are lost on a second evaluation

src/core/builtin_helpers.py

@@ -971,13 +971,13 @@ class CreateObjectIdentifiers:
         self.identifiers_key = {}
 
     @staticmethod
-    def sanitize(identifier):
+    def sanitize(identifier, default="0"):
         if identifier is None:
             return ""
 
         res = ""
         for c in identifier:
-            res += c if c.isalnum() else "0"
+            res += c if c.isalnum() else default
         return res
 
     def get_identifier(self, obj, wrapper):
@@ -998,7 +998,7 @@ class CreateObjectIdentifiers:
 
         identifier = wrapper + self.sanitize(obj.key or obj.name)
         if obj.id:
-            identifier += "__" + obj.id
+            identifier += "__" + self.sanitize(obj.id, "_")
 
         if identifier in self.identifiers_key:
             self.identifiers_key[identifier] += 1