Clean up ppp_stdlib.py

ppp_object.py

@@ -1,5 +1,3 @@
-# This file exists because I wanted to keep ppp_stdlib.py and ppp_interpreter.py seperate but they both rely on this one class.
-
 from abc import ABC, abstractmethod
 from dataclasses import dataclass
 from typing import Callable, Dict, List as List_, Tuple as Tuple_

ppp_stdlib.py

@@ -42,7 +42,13 @@ def len_impl(list_: Object) -> Object:
 	assert False
 
 # TODO: Use polymorphism to make this work for both list<T> and str
-# Len = PythonFunction("len", [('list', UnionType([ListType(VariableType("")), StrType]))], IntType, len_impl)
+Len = PythonFunction("len", [('list', ListType(VariableType("")))], IntType, len_impl)
+
+def str_len_impl(str_: Object) -> Object:
+	assert isinstance(str_, Str)
+	return Int(len(str_.str))
+
+StrLen = PythonFunction("strlen", [('string', StrType)], IntType, str_len_impl)
 
 def str_to_int_impl(str_: Object) -> Object:
 	assert isinstance(str_, Str)
@@ -100,7 +106,8 @@ variables: Dict[str, Object] = {
 	'void': VoidTypeObj,
 	'debug_print': DebugPrint,
 	'read': Read,
-	# 'len': Len,
+	'len': Len,
+	'str_len': StrLen,
 	'str_to_int': StrToInt,
 	'none': NoneObj,
 	'range': Range,