From d183edf54e3c74c52471c694068ec7fcc5f7aa34 Mon Sep 17 00:00:00 2001
From: Sayed Adel <seiko@imavr.com>
Date: Wed, 15 Mar 2023 21:24:04 +0200
Subject: ENH: Raise C++ standard to C++17

---
 numpy/core/src/npymath/npy_math_private.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'numpy/core/src')

diff --git a/numpy/core/src/npymath/npy_math_private.h b/numpy/core/src/npymath/npy_math_private.h
index a474b3de3..20c94f98a 100644
--- a/numpy/core/src/npymath/npy_math_private.h
+++ b/numpy/core/src/npymath/npy_math_private.h
@@ -21,6 +21,7 @@
 #include <Python.h>
 #ifdef __cplusplus
 #include <cmath>
+#include <complex>
 using std::isgreater;
 using std::isless;
 #else
@@ -494,8 +495,9 @@ do {                                                            \
  * Microsoft C defines _MSC_VER
  * Intel compiler does not use MSVC complex types, but defines _MSC_VER by
  * default.
+ * since c++17 msvc is no longer support them.
  */
-#if defined(_MSC_VER) && !defined(__INTEL_COMPILER)
+#if !defined(__cplusplus) && defined(_MSC_VER) && !defined(__INTEL_COMPILER)
 typedef union {
         npy_cdouble npy_z;
         _Dcomplex c99_z;
-- 
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