Squashed 'external/entt/entt/' content from commit fef92113

git-subtree-dir: external/entt/entt
git-subtree-split: fef921132cae7588213d0f9bcd2fb9c8ffd8b7fc

test/lib/dispatcher/lib.cpp

@@ -0,0 +1,8 @@
+#include <entt/core/attribute.h>
+#include <entt/signal/dispatcher.hpp>
+#include "types.h"
+
+ENTT_API void trigger(entt::dispatcher &dispatcher) {
+    dispatcher.trigger<event>();
+    dispatcher.trigger(message{42});
+}

test/lib/dispatcher/main.cpp

@@ -0,0 +1,28 @@
+#include <gtest/gtest.h>
+#include <entt/core/attribute.h>
+#include <entt/core/utility.hpp>
+#include <entt/signal/dispatcher.hpp>
+#include <entt/signal/sigh.hpp>
+#include "types.h"
+
+ENTT_API void trigger(entt::dispatcher &);
+
+struct listener {
+    void on(message msg) {
+        value = msg.payload;
+    }
+
+    int value{};
+};
+
+TEST(Lib, Dispatcher) {
+    entt::dispatcher dispatcher;
+    listener listener;
+
+    ASSERT_EQ(listener.value, 0);
+
+    dispatcher.sink<message>().connect<entt::overload<void(message)>(&listener::on)>(listener);
+    trigger(dispatcher);
+
+    ASSERT_EQ(listener.value, 42);
+}

test/lib/dispatcher/types.h

@@ -0,0 +1,12 @@
+#ifndef ENTT_LIB_DISPATCHER_TYPES_H
+#define ENTT_LIB_DISPATCHER_TYPES_H
+
+#include <entt/core/attribute.h>
+
+struct ENTT_API message {
+    int payload;
+};
+
+struct ENTT_API event {};
+
+#endif