Implemented FunctionParser

src/core/sheerka/services/SheerkaExecute.py

@@ -2,7 +2,7 @@ import core.utils
 from cache.Cache import Cache
 from core.builtin_concepts import BuiltinConcepts, ReturnValueConcept
 from core.sheerka.services.sheerka_service import BaseService
-from core.tokenizer import Tokenizer, TokenKind, Keywords, Token
+from core.tokenizer import Tokenizer, TokenKind, Token
 
 NO_MATCH = "** No Match **"
 
@@ -88,6 +88,20 @@ class ParserInput:
 
         return self.pos < self.end
 
+    def seek(self, pos):
+        """
+        Move the token offset to position pos
+        :param pos:
+        :return: True is pos is a valid position False otherwise
+        """
+        if pos < 0 or pos >= self.end:
+            self.token = None
+            return False
+
+        self.pos = pos
+        self.token = self.tokens[self.pos]
+        return True
+
     def is_empty(self):
         if self.text.strip() == "":
             return True
@@ -116,7 +130,6 @@ class ParserInput:
             tokens = [tokens]
 
         switcher = {
-            TokenKind.KEYWORD: lambda t: Keywords(t.value).value,
             TokenKind.CONCEPT: lambda t: core.utils.str_concept(t.value),
         }