From 231aad38493c871dd32930a21d256cbacd2ae20c Mon Sep 17 00:00:00 2001
From: Serhiy Storchaka <storchaka@gmail.com>
Date: Mon, 17 Jun 2019 16:57:27 +0300
Subject: bpo-37315: Deprecate accepting floats in math.factorial(). (GH-14147)

---
 Modules/mathmodule.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'Modules/mathmodule.c')

diff --git a/Modules/mathmodule.c b/Modules/mathmodule.c
index 82a9a14724..a75a3c929e 100644
--- a/Modules/mathmodule.c
+++ b/Modules/mathmodule.c
@@ -1981,6 +1981,12 @@ math_factorial(PyObject *module, PyObject *arg)
     PyObject *result, *odd_part, *pyint_form;
 
     if (PyFloat_Check(arg)) {
+        if (PyErr_WarnEx(PyExc_DeprecationWarning,
+                         "Using factorial() with floats is deprecated",
+                         1) < 0)
+        {
+            return NULL;
+        }
         PyObject *lx;
         double dx = PyFloat_AS_DOUBLE((PyFloatObject *)arg);
         if (!(Py_IS_FINITE(dx) && dx == floor(dx))) {
-- 
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