From ea1a4b79327ac70ea6ac4849ad889e3b9e0ce157 Mon Sep 17 00:00:00 2001
From: Mahmoud Al-Qudsi <mqudsi@neosmart.net>
Date: Sat, 6 Feb 2021 17:01:17 -0600
Subject: [PATCH] Explicitly annotate intentional switch fallthrough

This silences a very useful warning in GCC 10.
---
 config_cmake.h.in | 6 ++++++
 src/reader.cpp    | 4 ++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/config_cmake.h.in b/config_cmake.h.in
index 5266f6eb0..dceb16092 100644
--- a/config_cmake.h.in
+++ b/config_cmake.h.in
@@ -198,3 +198,9 @@
 #else
 #define __warn_unused_type
 #endif
+
+#if __has_attribute(fallthrough)
+#define __fallthrough__ __attribute__ ((fallthrough))
+#else
+#define __fallthrough__
+#endif
diff --git a/src/reader.cpp b/src/reader.cpp
index cd63a15da..50c1788a0 100644
--- a/src/reader.cpp
+++ b/src/reader.cpp
@@ -2941,9 +2941,9 @@ void reader_data_t::handle_readline_command(readline_cmd_t c, readline_loop_stat
                 parser().libdata().is_repaint = false;
                 break;
             }
-            // Else we repaint as normal
+            // Else we repaint as normal.
+            __fallthrough__
         }
-            /* fallthrough */
         case rl::force_repaint:
         case rl::repaint: {
             parser().libdata().is_repaint = true;