From c980fda799c1d66070bf79ea1f464bec71139ab5 Mon Sep 17 00:00:00 2001
From: Martin Holters <martin.holters@hsu-hh.de>
Date: Tue, 1 Oct 2019 17:13:34 +0200
Subject: [PATCH] Drop compat for `corrected` kw arg to `cov` from #401

---
 README.md        |  2 --
 src/Compat.jl    | 29 -----------------------------
 test/runtests.jl | 14 --------------
 3 files changed, 45 deletions(-)

diff --git a/README.md b/README.md
index fc80fbc74..d301c024c 100644
--- a/README.md
+++ b/README.md
@@ -123,8 +123,6 @@ Currently, the `@compat` macro supports the following syntaxes:
 * `Base.rtoldefault` how takes a third parameter `atol`.
   The two argument form is deprecated in favor of the three arguments form with `atol=0`.
 
-* The `corrected` optional argument of `cov` becomes a keyword argument of `Compat.Statistics.cov` ([#21709]).
-
 * `isequal`, `==` and `in` have one argument "curried" forms. For example `isequal(x)`
   returns a function that compares its arguments to `x` using `isequal` ([#26436]).
 
diff --git a/src/Compat.jl b/src/Compat.jl
index 79dc9e219..908509736 100644
--- a/src/Compat.jl
+++ b/src/Compat.jl
@@ -22,35 +22,6 @@ end
 
 include("compatmacro.jl")
 
-if VERSION < v"0.7.0-DEV.755"
-    # This is a hack to only add keyword signature that won't work on all julia versions.
-    # However, since we really only need to support a few (0.5, 0.6 and early 0.7) versions
-    # this should be good enough.
-    # TODO add deprecation warning to switch to StatsBase
-    let Tf = typeof(Base.cov), Tkw = Core.Core.kwftype(Tf)
-        @eval begin
-            @inline function _get_corrected(kws)
-                corrected = true
-                nkw = length(kws) >> 1
-                for i in 1:nkw
-                    if kws[i * 2 - 1] !== :corrected
-                        Base.kwerr(kws)
-                    end
-                    corrected = kws[i * 2]
-                end
-                return corrected::Bool
-            end
-            (::$Tkw)(kws::Vector{Any}, ::$Tf, x::AbstractVector) = Base.cov(x, _get_corrected(kws))
-            (::$Tkw)(kws::Vector{Any}, ::$Tf, X::AbstractVector, Y::AbstractVector) =
-                Base.cov(X, Y, _get_corrected(kws))
-            (::$Tkw)(kws::Vector{Any}, ::$Tf, x::AbstractMatrix, vardim::Int) =
-                Base.cov(x, vardim, _get_corrected(kws))
-            (::$Tkw)(kws::Vector{Any}, ::$Tf, X::AbstractVecOrMat, Y::AbstractVecOrMat,
-                     vardim::Int) = Base.cov(X, Y, vardim, _get_corrected(kws))
-        end
-    end
-end
-
 # 0.7.0-DEV.1415
 @static if !isdefined(Base, :adjoint)
     const adjoint = ctranspose
diff --git a/test/runtests.jl b/test/runtests.jl
index b5c4e3c49..d981c2226 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -140,20 +140,6 @@ end
 @test isa(Base.rtoldefault(Float64, Float64, 0), Float64)
 @test Base.rtoldefault(Float64, Float64, 1.0) === 0.0
 
-# 0.7
-if VERSION  < v"0.7.0-DEV.5238"
-    # Test the extended cov if cov is part of Base. In the future, this will be dealt with
-    # in StatsBase
-    @test cov([1 2; 3 4], 1, corrected=true) == fill(2.0, 2, 2)
-    @test cov([1 2; 3 4], 1, corrected=false) == fill(1.0, 2, 2)
-    @test cov([1 2; 3 4], [0 4; 8 9], 1, corrected=true) == [8.0 5.0; 8.0 5.0]
-    @test cov([1 2; 3 4], [0 4; 8 9], 1, corrected=false) == [4.0 2.5; 4.0 2.5]
-    @test cov([1, 2], corrected=true) === 0.5
-    @test cov([1, 2], corrected=false) === 0.25
-    @test cov([1, 2], [0, 10], corrected=true) === 5.0
-    @test cov([1, 2], [0, 10], corrected=false) === 2.5
-end
-
 # 0.7
 module Test23876
     using Compat