From a7a37409db8d861b6ed1ff906aa61193736bf0d8 Mon Sep 17 00:00:00 2001
From: Sacha Verweij <sacha@stanford.edu>
Date: Sat, 7 Jan 2017 15:29:25 -0800
Subject: [PATCH] Deprecate array-reducing isinteger.

---
 base/abstractarraymath.jl | 3 +--
 base/deprecated.jl        | 3 +++
 base/number.jl            | 5 +----
 test/abstractarray.jl     | 2 +-
 test/arrayops.jl          | 2 +-
 5 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/base/abstractarraymath.jl b/base/abstractarraymath.jl
index 93135aed45faa..72eba80cfa3b1 100644
--- a/base/abstractarraymath.jl
+++ b/base/abstractarraymath.jl
@@ -2,11 +2,10 @@
 
  ## Basic functions ##
 
-isinteger(x::AbstractArray) = all(isinteger,x)
-isinteger{T<:Integer,n}(x::AbstractArray{T,n}) = true
 isreal(x::AbstractArray) = all(isreal,x)
 iszero(x::AbstractArray) = all(iszero,x)
 isreal{T<:Real,n}(x::AbstractArray{T,n}) = true
+all{T<:Integer}(::typeof(isinteger), ::AbstractArray{T}) = true
 
 ## Constructors ##
 
diff --git a/base/deprecated.jl b/base/deprecated.jl
index 07de11d104777..13d19d2601697 100644
--- a/base/deprecated.jl
+++ b/base/deprecated.jl
@@ -1541,6 +1541,9 @@ function frexp{T<:AbstractFloat}(A::Array{T})
     return (F, E)
 end
 
+# Deprecate reducing isinteger over arrays
+@deprecate isinteger(A::AbstractArray) all(isinteger, A)
+
 # Deprecate promote_eltype_op (#19814, #19937)
 _promote_eltype_op(::Any) = Any
 _promote_eltype_op(op, A) = (@_inline_meta; promote_op(op, eltype(A)))
diff --git a/base/number.jl b/base/number.jl
index 303ab5cb460c5..5648ed651a944 100644
--- a/base/number.jl
+++ b/base/number.jl
@@ -4,14 +4,11 @@
 """
     isinteger(x) -> Bool
 
-Test whether `x` or all its elements are numerically equal to some integer.
+Test whether `x` is numerically equal to some integer.
 
 ```jldoctest
 julia> isinteger(4.0)
 true
-
-julia> isinteger([1; 2; 5.5])
-false
 ```
 """
 isinteger(x::Integer) = true
diff --git a/test/abstractarray.jl b/test/abstractarray.jl
index 2beb33da6895b..9e4de03aa0351 100644
--- a/test/abstractarray.jl
+++ b/test/abstractarray.jl
@@ -747,7 +747,7 @@ let
 end
 
 # isinteger and isreal
-@test isinteger(Diagonal(rand(1:5,5)))
+@test all(isinteger, Diagonal(rand(1:5, 5))) # reducing isinteger(...) deprecated
 @test isreal(Diagonal(rand(5)))
 
 # unary ops
diff --git a/test/arrayops.jl b/test/arrayops.jl
index a46d640b26a5a..b28fd3180a913 100644
--- a/test/arrayops.jl
+++ b/test/arrayops.jl
@@ -277,7 +277,7 @@ end
         X = get(A, -5:5, NaN32)
         @test eltype(X) == Float32
         @test Base.elsize(X) == sizeof(Float32)
-        @test !isinteger(X)
+        @test !all(isinteger, X)
         @test isnan.(X) == [trues(6);falses(5)]
         @test X[7:11] == [1:5;]
         X = get(A, (2:4, 9:-2:-13), 0)