initial

external/loft/modules/base/include/result.hpp

@@ -0,0 +1,63 @@
+#pragma once
+
+#include <signal.h>
+#include <utility>
+
+#define EXPECT(expression,msg) if(!(expression)) { throw std::runtime_error(msg); }
+
+enum ResultCode {
+	RESULT_OK,
+	RESULT_INVALID_ARGUMENT,
+	RESULT_DRW_FAILURE,
+	RESULT_GPU_ALLOCATION_FAIL,
+	RESULT_GPU_RESOURCE_FAIL,
+	RESULT_GPU_IMAGE_MEMORY_FAIL,
+    RESULT_DRW_FAILED_CREATE_SHADER,
+	RESULT_GPU_DEVICE_CREATION_FAILED,
+    RESULT_GPU_COMMAND_POOL_CREATION_FAILED,
+    RESULT_GPU_DESCRIPTOR_POOL_CREATION_FAILED,
+	RESULT_NO_AVAILABLE_GPU,
+};
+
+/**
+ * Result. Returns either TResult or TError
+ */
+template<typename TResult, typename TError>
+union result {
+private:
+	bool m_isOk;
+
+	struct {
+		bool m_isOk;
+		TResult m_result;
+	} m_result;
+
+	struct {
+		bool m_isOk;
+		TError m_error;
+	} m_error;
+
+
+
+public:
+
+    result(TResult result) :
+            m_result({
+                             .m_isOk = true,
+                             .m_result = result
+                     }) {
+
+    }
+
+    ~result() {
+
+    }
+
+	static result ok(TResult value) { return std::move(result(value)); }
+
+	static result err(TError err) { return { .m_error = err }; }
+
+	void expect(const char* msg) { raise(SIGINT); }
+
+	bool is_ok() const { return m_isOk; }
+};