Initial commit - fix problems & refactor code

core/primitives/list.py

@@ -0,0 +1,26 @@
+from typing import Any
+
+from core.exceptions import syntaxError
+# from core.printer import Representation
+
+class LinkedList:
+    value = None
+    nxt = None
+
+    def __init__(self, value_, nxt_):
+        self.value = value_
+        self.nxt = nxt_
+
+def car(lst):
+    return lst.value
+
+def cdr(lst):
+    return lst.nxt
+
+def cons(val, lst):
+    return LinkedList(val, lst)
+
+def isList(val):
+    return isinstance(val, LinkedList)
+
+NIL = cons(None, None)

core/primitives/symbol.py

@@ -0,0 +1,25 @@
+from functools import lru_cache
+
+class Symbol:
+    _name: str
+
+    def __init__(self, name):
+        self._name = name
+
+    @property
+    def name(self):
+        return self._name
+
+@lru_cache(maxsize=None)
+def symbol(name: str) -> Symbol:
+    return Symbol(name)
+
+def symbolName(sym: Symbol) -> str:
+    # return sym.name[1:]
+    return sym.name
+
+def symbolKey(sym: Symbol) -> str:
+    return sym.name
+
+def isSymbol(obj) -> bool:
+    return isinstance(obj, Symbol)