From 6f7d3fcd79cc0d22de54f61dac6b8ec44148f064 Mon Sep 17 00:00:00 2001
From: Patrick Pelissier <Patrick.Pelissier@gmail.com>
Date: Thu, 31 Dec 2020 00:12:36 +0100
Subject: [PATCH] Add limiation on M_EMPTY_P

---
 README.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/README.md b/README.md
index 4d67fcb0..715d7cbf 100644
--- a/README.md
+++ b/README.md
@@ -5468,6 +5468,10 @@ Return 1 if the argument 'expression' is 'empty', 0 otherwise.
 Return a pre-processing token corresponding to this value (meaning it is evaluated
 at macro processing stage, not at compiler stage).
 
+NOTE: It should work for a wide range of inputs
+except when it is called with a macro function that takes
+more than one argument (in which case it generates a compiler error).
+
 ##### M\_DEFERRED\_COMMA
 
 Return a comma ',' at a later phase of the macro processing steps.