Added uqueue

ufpy/uqueue.py

@@ -0,0 +1,55 @@
+from __future__ import annotations
+from typing import Generic, TypeVar, Any
+
+__all__ = (
+    "UQueue",
+)
+
+VT = TypeVar("VT")
+
+class UQueue(Generic[VT]):
+    def __init__(self, *__list):
+        self.__list: list[VT] = list(__list)
+        self.__index = 0
+
+    def pop(self) -> VT:
+        return self.__list.pop(0)
+
+    def push(self, value: VT) -> VT:
+        self.__list.append(value)
+        return value
+
+    @property
+    def head(self) -> None:
+        return self.__list[-1] if self else None
+
+    def copy(self) -> UQueue:
+        return UQueue(self.__list.copy())
+
+    def set_head(self, value: VT) -> VT:
+        if self:
+            self.__list[-1] = value
+            return value
+        else:
+            raise IndexError("Index out of range")
+
+    def is_empty(self) -> bool:
+        return len(self) == 0
+
+    def __len__(self) -> int:
+        return len(self.__list)
+
+    def __nonzero__(self) -> bool:
+        return not self.is_empty()
+
+    def __str__(self) -> str:
+        return str(self.__list)
+
+    def __iter__(self) -> UQueue:
+        return self
+
+    def __next__(self) -> VT:
+        if self.is_empty():
+            raise StopIteration
+        else:
+            return self.__list.pop(0)