1 files changed, 30 insertions, 0 deletions
diff --git a/compilador/nanoiter.py b/compilador/nanoiter.py
new file mode 100644
index 0000000..928522f
--- /dev/null
+++ b/compilador/nanoiter.py
@@ -0,0 +1,30 @@
+from typing import Optional, NoReturn, List, TypeVar
+
+T = TypeVar('T')
+
+class NanoIter:
+    def __init__(self, l: List[T]):
+        self.i = -1
+        self.l: List[T] = l
+
+    def next(self) -> T:
+        if self.i == len(self.l):
+            raise StopIteration()
+        else:
+            self.i += 1
+            return self.l[self.i]
+
+    def get(self, i = None):
+        return self.l[self.i] if not i else self.l[i]
+
+    def back(self) -> NoReturn:
+        if self.i <= 0:
+            self.i = -1
+        else:
+            self.i -= 1
+
+    def peek(self) -> T:
+        if self.i == len(self.l):
+            raise StopIteration()
+        else:
+            return self.l[self.i + 1]