From 80ff4aa6121c237d83d27171d833a64d3a8d4a81 Mon Sep 17 00:00:00 2001
From: Matt Borland <matt@mattborland.com>
Date: Wed, 11 Jan 2023 10:54:33 -0800
Subject: [PATCH] Add deprecation notice to complex functions

---
 include/boost/math/complex/acos.hpp  | 2 +-
 include/boost/math/complex/acosh.hpp | 2 +-
 include/boost/math/complex/asin.hpp  | 2 +-
 include/boost/math/complex/asinh.hpp | 2 +-
 include/boost/math/complex/atan.hpp  | 2 +-
 include/boost/math/complex/atanh.hpp | 2 +-
 6 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/include/boost/math/complex/acos.hpp b/include/boost/math/complex/acos.hpp
index 9da98ca8fb..91df777414 100644
--- a/include/boost/math/complex/acos.hpp
+++ b/include/boost/math/complex/acos.hpp
@@ -20,7 +20,7 @@ namespace std{ using ::sqrt; using ::fabs; using ::acos; using ::asin; using ::a
 namespace boost{ namespace math{
 
 template<class T> 
-std::complex<T> acos(const std::complex<T>& z)
+[[deprecated("Replaced by C++11")]] std::complex<T> acos(const std::complex<T>& z)
 {
    //
    // This implementation is a transcription of the pseudo-code in:
diff --git a/include/boost/math/complex/acosh.hpp b/include/boost/math/complex/acosh.hpp
index 4f987cbee8..c5b52826e5 100644
--- a/include/boost/math/complex/acosh.hpp
+++ b/include/boost/math/complex/acosh.hpp
@@ -16,7 +16,7 @@
 namespace boost{ namespace math{
 
 template<class T> 
-inline std::complex<T> acosh(const std::complex<T>& z)
+[[deprecated("Replaced by C++11")]] inline std::complex<T> acosh(const std::complex<T>& z)
 {
    //
    // We use the relation acosh(z) = +-i acos(z)
diff --git a/include/boost/math/complex/asin.hpp b/include/boost/math/complex/asin.hpp
index 0d37ee3d75..d1fbc2f164 100644
--- a/include/boost/math/complex/asin.hpp
+++ b/include/boost/math/complex/asin.hpp
@@ -20,7 +20,7 @@ namespace std{ using ::sqrt; using ::fabs; using ::acos; using ::asin; using ::a
 namespace boost{ namespace math{
 
 template<class T> 
-inline std::complex<T> asin(const std::complex<T>& z)
+[[deprecated("Replaced by C++11")]] inline std::complex<T> asin(const std::complex<T>& z)
 {
    //
    // This implementation is a transcription of the pseudo-code in:
diff --git a/include/boost/math/complex/asinh.hpp b/include/boost/math/complex/asinh.hpp
index 6761cfb485..1c9a42eb07 100644
--- a/include/boost/math/complex/asinh.hpp
+++ b/include/boost/math/complex/asinh.hpp
@@ -16,7 +16,7 @@
 namespace boost{ namespace math{
 
 template<class T> 
-inline std::complex<T> asinh(const std::complex<T>& x)
+[[deprecated("Replaced by C++11")]] inline std::complex<T> asinh(const std::complex<T>& x)
 {
    //
    // We use asinh(z) = i asin(-i z);
diff --git a/include/boost/math/complex/atan.hpp b/include/boost/math/complex/atan.hpp
index a2104162cb..a11ea41ee5 100644
--- a/include/boost/math/complex/atan.hpp
+++ b/include/boost/math/complex/atan.hpp
@@ -16,7 +16,7 @@
 namespace boost{ namespace math{
 
 template<class T> 
-std::complex<T> atan(const std::complex<T>& x)
+[[deprecated("Replaced by C++11")]] std::complex<T> atan(const std::complex<T>& x)
 {
    //
    // We're using the C99 definition here; atan(z) = -i atanh(iz):
diff --git a/include/boost/math/complex/atanh.hpp b/include/boost/math/complex/atanh.hpp
index c545590995..5b7dc90108 100644
--- a/include/boost/math/complex/atanh.hpp
+++ b/include/boost/math/complex/atanh.hpp
@@ -21,7 +21,7 @@ namespace std{ using ::sqrt; using ::fabs; using ::acos; using ::asin; using ::a
 namespace boost{ namespace math{
 
 template<class T> 
-std::complex<T> atanh(const std::complex<T>& z)
+[[deprecated("Replaced by C++11")]] std::complex<T> atanh(const std::complex<T>& z)
 {
    //
    // References: