#ifndef COMMON_RESULT_H
#define COMMON_RESULT_H

#include "common/linked.h"
#include "common/maybe_unused.h"
#include <stdbool.h>

#define RESULT(VALUE, ERROR, STRUCT_NAME)                                      \
	typedef struct {                                                           \
		bool ok;                                                               \
		union {                                                                \
			VALUE value;                                                       \
			ERROR error;                                                       \
		};                                                                     \
	} STRUCT_NAME;

#define RESULT_CTORS(VALUE, ERROR, STRUCT_NAME, FUNCTION_PREFIX)               \
	MAYBE_UNUSED static inline STRUCT_NAME FUNCTION_PREFIX##_ok(VALUE value)   \
	{                                                                          \
		return (STRUCT_NAME) {                                                 \
			.ok = true,                                                        \
			.value = value,                                                    \
		};                                                                     \
	}                                                                          \
                                                                               \
	MAYBE_UNUSED static inline STRUCT_NAME FUNCTION_PREFIX##_error(ERROR error \
	)                                                                          \
	{                                                                          \
		return (STRUCT_NAME) {                                                 \
			.ok = false,                                                       \
			.error = error,                                                    \
		};                                                                     \
	}

#define RESULT_WITH_CTORS(VALUE, ERROR, STRUCT_NAME, FUNCTION_PREFIX)          \
	RESULT(VALUE, ERROR, STRUCT_NAME)                                          \
	RESULT_CTORS(VALUE, ERROR, STRUCT_NAME, FUNCTION_PREFIX)

#endif