From aa04d94a39cd7765231ae57d93695045e80ca837 Mon Sep 17 00:00:00 2001
From: Carlo Baldassi <carlobaldassi@gmail.com>
Date: Thu, 14 Jun 2018 17:12:25 +0200
Subject: [PATCH] atan2 -> atan

---
 README.md        | 3 +++
 src/Compat.jl    | 5 +++++
 test/runtests.jl | 6 ++++++
 3 files changed, 14 insertions(+)

diff --git a/README.md b/README.md
index 52dc9b1a1..5e498609c 100644
--- a/README.md
+++ b/README.md
@@ -416,6 +416,8 @@ Currently, the `@compat` macro supports the following syntaxes:
 
 * `Unicode.isnumeric` is now available as `isnumeric` ([#25479]).
 
+* `atan2` is now a 2-argument method of `atan` ([#27253]).
+
 ## New macros
 
 * `@__DIR__` has been added ([#18380])
@@ -645,3 +647,4 @@ includes this fix. Find the minimum version from there.
 [#27077]: https://github.com/JuliaLang/julia/issues/27077
 [#27258]: https://github.com/JuliaLang/julia/issues/27258
 [#27298]: https://github.com/JuliaLang/julia/issues/27298
+[#27253]: https://github.com/JuliaLang/julia/issues/27253
diff --git a/src/Compat.jl b/src/Compat.jl
index b138dea27..915ff6ef4 100644
--- a/src/Compat.jl
+++ b/src/Compat.jl
@@ -1933,6 +1933,11 @@ if VERSION < v"0.7.0-DEV.5278"
     export something
 end
 
+# https://github.com/JuliaLang/julia/pull/27253
+@static if VERSION < v"0.7.0-alpha.44"
+    Base.atan(x::Real, y::Real) = atan2(x, y)
+end
+
 include("deprecated.jl")
 
 end # module Compat
diff --git a/test/runtests.jl b/test/runtests.jl
index c339a7878..73963fa47 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -1778,4 +1778,10 @@ let sep = Compat.Sys.iswindows() ? ';' : ':'
     end
 end
 
+# 0.7.0-alpha.44
+@test atan(1, 2) == atan(0.5)
+@test atan(1.0, 2.0) == atan(0.5)
+@test atan(-1.0, -2.0) ≈ atan(0.5) - π
+@test atan(big"-1.0", big"-2.0") ≈ atan(big"0.5") - π
+
 nothing