Basic setup for Cpp based screeping.

src/loop.cpp

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+#include <Screeps/Context.hpp>
+#include <Screeps/Creep.hpp>
+#include <Screeps/StructureSpawn.hpp>
+
+#include <emscripten.h>
+#include <emscripten/bind.h>
+#include <emscripten/val.h>
+
+#include "structures/spawn.hpp"
+
+EMSCRIPTEN_KEEPALIVE
+extern "C" void loop()
+{
+	Screeps::Context::update();
+
+	EM_ASM({ console.log('Starting loop...'); });
+
+	auto spawnManager = SpawnManager();
+	spawnManager.process();
+
+	auto creeps = Screeps::Game.creeps();
+	for (auto& creep : creeps)
+		creep.second.say("screepsxx");
+}
+
+EMSCRIPTEN_BINDINGS(loop)
+{
+	emscripten::function("loop", &loop);
+}

src/spawn.cpp

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+#include <Screeps/Game.hpp>
+#include <Screeps/Room.hpp>
+#include <Screeps/StructureSpawn.hpp>
+
+#include <emscripten.h>
+
+#include "structures/spawn.hpp"
+
+void SpawnManager::process()
+{
+    for (auto& spawn : Screeps::Game.spawns())
+    {
+        int creepcount = spawn.second.room().find(Screeps::FIND_MY_CREEPS, nullptr).size();
+        // EM_ASM({ console.log('creepcount: ' + $0); }, creepcount);
+        if (creepcount >= 3) continue;
+        int resp = spawn.second.spawnCreep({"work", "carry", "move"}, "harvester" + std::to_string(creepcount + 1));
+    }
+}