Implemented SheerkaOntology

src/core/sheerka/services/SheerkaExecute.py

@@ -1,6 +1,8 @@
 import core.utils
 from cache.Cache import Cache
+from cache.FastCache import FastCache
 from core.builtin_concepts import BuiltinConcepts, ReturnValueConcept
+from core.global_symbols import NotFound
 from core.sheerka.services.sheerka_service import BaseService
 from core.tokenizer import Tokenizer, TokenKind, Token
 
@@ -166,7 +168,7 @@ class SheerkaExecute(BaseService):
 
     def __init__(self, sheerka):
         super().__init__(sheerka)
-        self.pi_cache = Cache(default=lambda key: ParserInput(key), max_size=20)
+        self.pi_cache = FastCache(default=lambda key: ParserInput(key), max_size=20)
         self.instantiated_evaluators = None
         self.evaluators_by_name = None
 
@@ -192,10 +194,12 @@ class SheerkaExecute(BaseService):
     def initialize(self):
         self.sheerka.bind_service_method(self.execute, True)
 
-        self.sheerka.cache_manager.register_cache(self.PARSERS_INPUTS_ENTRY, self.pi_cache, False)
         self.reset_registered_evaluators()
         self.reset_registered_parsers()
 
+    def reset_state(self):
+        self.pi_cache.clear()
+
     def reset_registered_evaluators(self):
         # instantiate evaluators, once for all, only keep when it's enabled
         self.instantiated_evaluators = [e_class() for e_class in self.sheerka.evaluators]
@@ -340,7 +344,7 @@ class SheerkaExecute(BaseService):
 
         if tokens is None or self.pi_cache.has(text):
             pi = self.pi_cache.get(text)
-            if pi is None:  # when CacheManager.cache_only is True
+            if pi is NotFound:  # when CacheManager.cache_only is True
                 pi = ParserInput(text)
                 self.pi_cache.put(text, pi)
             return pi