Fix itertools.accumulate

stdlib/itertools.codon

@@ -53,17 +53,17 @@ def accumulate(iterable: Generator[T], func=lambda a, b: a + b, initial=0, T: ty
         total = func(total, element)
         yield total
 
-# @inline
-# @overload
-# def accumulate(iterable: Generator[T], func=lambda a, b: a + b, T: type):
-#     """
-#     Make an iterator that returns accumulated sums, or accumulated results
-#     of other binary functions (specified via the optional func argument).
-#     """
-#     total = None
-#     for element in iterable:
-#         total = element if total is None else func(unwrap(total), element)
-#         yield unwrap(total)
+@inline
+@overload
+def accumulate(iterable: Generator[T], func=lambda a, b: a + b, T: type):
+    """
+    Make an iterator that returns accumulated sums, or accumulated results
+    of other binary functions (specified via the optional func argument).
+    """
+    total: Optional[T] = None
+    for element in iterable:
+        total = element if total is None else func(unwrap(total), element)
+        yield unwrap(total)
 
 @tuple
 class chain:

test/parser/types.codon

@@ -463,6 +463,18 @@ foo("he", z)  #: hewoo
 X(s='lolo') #: lolo lolo Int[1]
 X('abc') #: abc abc Int[2]
 
+
+def foo2(x: Static[str]):
+    print(x, x.__is_static__)
+s: Static[str] = "abcdefghijkl"
+foo2(s)  #: abcdefghijkl True
+foo2(s[1])  #: b True
+foo2(s[1:5])  #: bcde True
+foo2(s[10:50])  #: kl True
+foo2(s[1:30:3])  #: behk True
+foo2(s[::-1])  #: lkjihgfedcba True
+
+
 #%% static_getitem
 print Int[staticlen("ee")].__class__.__name__ #: Int[2]