BitVector constructor from NTuple (#33792)

JuliaLang · Apr 11, 2020 · bc6b77d · bc6b77d
1 parent 93c747c
commit bc6b77d
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diff --git a/base/bitarray.jl b/base/bitarray.jl
@@ -77,6 +77,28 @@ const BitMatrix = BitArray{2}
 
 BitVector() = BitArray{1}(undef, 0)
 
+"""
+    BitVector(nt::Tuple{Vararg{Bool}})
+
+Construct a `BitVector` from a tuple of `Bool`.
+# Examples
+```julia-repl
+julia> nt = (true, false, true, false)
+(true, false, true, false)
+
+julia> BitVector(nt)
+4-element BitArray{1}:
+ 1
+ 0
+ 1
+ 0
+```
+"""
+function BitVector(nt::Tuple{Vararg{Bool}})
+    bv = BitVector(undef, length(nt))
+    bv .= nt
+end
+
 ## utility functions ##
 
 length(B::BitArray) = B.len

diff --git a/test/bitarray.jl b/test/bitarray.jl
@@ -200,6 +200,12 @@ timesofar("utils")
         end
     end
 
+    @testset "constructor from NTuple" begin
+        for nt in ((true, false, false), NTuple{0,Bool}(), (false,), (true,))
+            @test BitVector(nt) == BitVector(collect(nt))
+        end
+    end
+
     @testset "one" begin
         @test Array(one(BitMatrix(undef, 2,2))) == Matrix(I, 2, 2)
         @test_throws DimensionMismatch one(BitMatrix(undef, 2,3))