dispatcher: uses type_id_v rather than a family

test/plugin/dispatcher/main.cpp

@@ -0,0 +1,33 @@
+#define CR_HOST
+
+#include <cr.h>
+#include <gtest/gtest.h>
+#include <entt/core/utility.hpp>
+#include <entt/signal/dispatcher.hpp>
+#include "types.h"
+
+struct listener {
+    void on(event ev) { value = ev.payload; }
+    void on(message msg) { value = msg.payload; }
+    int value{};
+};
+
+TEST(Lib, Dispatcher) {
+    entt::dispatcher dispatcher;
+    listener listener;
+
+    dispatcher.sink<event>().connect<entt::overload<void(event)>(&listener::on)>(listener);
+    dispatcher.sink<message>().connect<entt::overload<void(message)>(&listener::on)>(listener);
+    dispatcher.trigger<event>(3);
+
+    ASSERT_EQ(listener.value, 3);
+
+    cr_plugin ctx;
+    ctx.userdata = &dispatcher;
+    cr_plugin_load(ctx, PLUGIN);
+    cr_plugin_update(ctx);
+
+    ASSERT_EQ(listener.value, 42);
+
+    cr_plugin_close(ctx);
+}

test/plugin/dispatcher/plugin.cpp

@@ -0,0 +1,18 @@
+#include <cr.h>
+#include <entt/signal/dispatcher.hpp>
+#include "types.h"
+
+CR_EXPORT int cr_main(cr_plugin *ctx, cr_op operation) {
+    switch (operation) {
+    case CR_STEP:
+        static_cast<entt::dispatcher *>(ctx->userdata)->trigger<message>(42);
+        break;
+    case CR_LOAD:
+    case CR_UNLOAD:
+    case CR_CLOSE:
+        // nothing to do here, this is only a test.
+        break;
+    }
+
+    return 0;
+}

test/plugin/dispatcher/types.h

@@ -0,0 +1,12 @@
+#ifndef ENTT_PLUGIN_DISPATCHER_TYPES_H
+#define ENTT_PLUGIN_DISPATCHER_TYPES_H
+
+struct message {
+    int payload;
+};
+
+struct event {
+    int payload;
+};
+
+#endif // ENTT_PLUGIN_DISPATCHER_TYPES_H