Return int64 for reductions of bools

FrancescAlted · FrancescAlted · commit 3c639ed407e6 · 2026-01-13T08:11:45.000+01:00
diff --git a/src/blosc2/lazyexpr.py b/src/blosc2/lazyexpr.py
@@ -1819,6 +1819,8 @@ def infer_reduction_dtype(dtype, operation):
         dtype, np.float32 if dtype in (np.float32, np.complex64) else blosc2.DEFAULT_FLOAT
     )
     if operation in {ReduceOp.SUM, ReduceOp.PROD}:
+        if np.issubdtype(dtype, np.bool_):
+            return np.int64
         if np.issubdtype(dtype, np.unsignedinteger):
             return np.result_type(dtype, np.uint64)
         return np.result_type(dtype, np.int64 if np.issubdtype(dtype, np.integer) else my_float)

Original file line number	Diff line number	Diff line change
`@@ -1819,6 +1819,8 @@ def infer_reduction_dtype(dtype, operation):`
`1819`	`1819`	`dtype, np.float32 if dtype in (np.float32, np.complex64) else blosc2.DEFAULT_FLOAT`
`1820`	`1820`	`)`
`1821`	`1821`	`if operation in {ReduceOp.SUM, ReduceOp.PROD}:`
	`1822`	`+ if np.issubdtype(dtype, np.bool_):`
	`1823`	`+ return np.int64`
`1822`	`1824`	`if np.issubdtype(dtype, np.unsignedinteger):`
`1823`	`1825`	`return np.result_type(dtype, np.uint64)`
`1824`	`1826`	`return np.result_type(dtype, np.int64 if np.issubdtype(dtype, np.integer) else my_float)`