From 2680526e6ba1240363297c9ec34dbde807229d72 Mon Sep 17 00:00:00 2001
From: Lioncash <mathew1800@gmail.com>
Date: Fri, 28 Aug 2020 20:58:29 -0400
Subject: sdl_impl: Mark FromEvent() as a const member function

This doesn't modify internal member state, so it can be marked as const.
---
 src/input_common/sdl/sdl_impl.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/input_common/sdl/sdl_impl.cpp b/src/input_common/sdl/sdl_impl.cpp
index c8d9eb2bc..43fac7650 100644
--- a/src/input_common/sdl/sdl_impl.cpp
+++ b/src/input_common/sdl/sdl_impl.cpp
@@ -784,7 +784,7 @@ public:
         }
         return {};
     }
-    std::optional<Common::ParamPackage> FromEvent(const SDL_Event& event) {
+    [[nodiscard]] std::optional<Common::ParamPackage> FromEvent(const SDL_Event& event) const {
         switch (event.type) {
         case SDL_JOYAXISMOTION:
             if (std::abs(event.jaxis.value / 32767.0) < 0.5) {
@@ -795,7 +795,7 @@ public:
         case SDL_JOYHATMOTION:
             return {SDLEventToButtonParamPackage(state, event)};
         }
-        return {};
+        return std::nullopt;
     }
 };
 
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