From 0ae0262324034dfeebb86b733df48462a716e2f1 Mon Sep 17 00:00:00 2001
From: Sacha Verweij <sacha@stanford.edu>
Date: Fri, 30 Dec 2016 17:42:01 -0800
Subject: [PATCH] Restore a few methods for &, |, and xor over BitArrays as
 broadcast specializations.

---
 base/bitarray.jl | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/base/bitarray.jl b/base/bitarray.jl
index 162845406b236..f0ee068839fc9 100644
--- a/base/bitarray.jl
+++ b/base/bitarray.jl
@@ -1237,6 +1237,32 @@ end
 (/)(B::BitArray, x::Number) = (/)(Array(B), x)
 (/)(x::Number, B::BitArray) = (/)(x, Array(B))
 
+# broadcast specializations for &, |, and xor/⊻
+broadcast(::typeof(&), B::BitArray, x::Bool) = x ? copy(B) : falses(size(B))
+broadcast(::typeof(&), x::Bool, B::BitArray) = broadcast(&, B, x)
+broadcast(::typeof(|), B::BitArray, x::Bool) = x ? trues(size(B)) : copy(B)
+broadcast(::typeof(|), x::Bool, B::BitArray) = broadcast(|, B, x)
+broadcast(::typeof(xor), B::BitArray, x::Bool) = x ? ~B : copy(B)
+broadcast(::typeof(xor), x::Bool, B::BitArray) = broadcast(xor, B, x)
+for f in (:&, :|, :xor)
+    @eval begin
+        function broadcast(::typeof($f), A::BitArray, B::BitArray)
+            F = BitArray(promote_shape(size(A),size(B))...)
+            Fc = F.chunks
+            Ac = A.chunks
+            Bc = B.chunks
+            (isempty(Ac) || isempty(Bc)) && return F
+            for i = 1:length(Fc)
+                Fc[i] = ($f)(Ac[i], Bc[i])
+            end
+            Fc[end] &= _msk_end(F)
+            return F
+        end
+        broadcast(::typeof($f), A::DenseArray{Bool}, B::BitArray) = broadcast($f, BitArray(A), B)
+        broadcast(::typeof($f), B::BitArray, A::DenseArray{Bool}) = broadcast($f, B, BitArray(A))
+    end
+end
+
 
 ## promotion to complex ##