Docs: Mention that Py_UNREACHABLE was added in 3.7 (#4337)

The macro was added for bpo-31338 in commit b2e5794870eb4728ddfaafc0f79a40299576434f

diff --git a/Doc/c-api/intro.rst b/Doc/c-api/intro.rst
index e654c4c012651ebefe52b3c0c568061de4a15eca..de7139bc17f910607ef59d733aa2fb2f605aef0f 100644 (file)
--- a/Doc/c-api/intro.rst
+++ b/Doc/c-api/intro.rst
@@ -106,6 +106,8 @@ complete listing.
    all possible values are covered in ``case`` statements.  Use this in places
    where you might be tempted to put an ``assert(0)`` or ``abort()`` call.
 
+   .. versionadded:: 3.7
+
 .. c:macro:: Py_ABS(x)
 
    Return the absolute value of ``x``.