#ifndef WITH99_H
#define WITH99_H

#include <metalang99.h>
#include <metalang99/tuple.h>
#include <metalang99/variadics.h>
#include <metalang99/util.h>
#include <metalang99/lang.h>
#include <metalang99/bool.h>

#if !ML99_VERSION_COMPATIBLE(1, 13, 2)
#error Your Metalang99 is a bit mouldy, update to v1.13.2 or later.
#endif

#define WITH99_MAJOR 0
#define WITH99_MINOR 1
#define WITH99_PATCH 1

#define WITH99_VERSION_COMPATIBLE(x, y, z) (WITH99_MAJOR == (x) && ((WITH99_MINOR == (y) && WITH99_PATCH >= (z)) || (WITH99_MINOR > (y))))
#define WITH99_VERSION_EQ(x, y, z)         (WITH99_MAJOR == (x) &&   WITH99_MINOR == (y) && WITH99_PATCH == (z))

#define WITH99_priv_restype_IMPL(tResNameArgs)   ML99_call(ML99_cat(v(WITH99_resource_type_  ), ML99_tupleGet(0)(v(tResNameArgs))), ML99_tupleTail(v(tResNameArgs)))
#define WITH99_priv_resinit_IMPL(tResNameArgs)   ML99_call(ML99_cat(v(WITH99_resource_init_  ), ML99_tupleGet(0)(v(tResNameArgs))), ML99_tupleTail(v(tResNameArgs)))
#define WITH99_priv_resfree_IMPL(tResNameArgs)   ML99_call(ML99_cat(v(WITH99_resource_free_  ), ML99_tupleGet(0)(v(tResNameArgs))), ML99_tupleTail(v(tResNameArgs)))
#define WITH99_priv_resthrows_IMPL(tResNameArgs) ML99_call(ML99_cat(v(WITH99_resource_throws_), ML99_tupleGet(0)(v(tResNameArgs))), ML99_tupleTail(v(tResNameArgs)))

#define WITH99_priv_declare_resource_IMPL(tResNameArgs) ML99_call(v(WITH99_priv_restype),   v(tResNameArgs)), ML99_tupleGet(1)(v(tResNameArgs))
#define WITH99_priv_init_resource_IMPL(tResNameArgs)    ML99_call(v(WITH99_priv_resinit),   v(tResNameArgs))
#define WITH99_priv_free_resource_IMPL(tResNameArgs)    ML99_call(v(WITH99_priv_resfree),   v(tResNameArgs))
#define WITH99_priv_throws_resource_IMPL(tResNameArgs)  ML99_call(v(WITH99_priv_resthrows), v(tResNameArgs))

#define WITH99_priv_throw_match_0_IMPL(tResNameArgs)\
	ML99_appl(ML99_reify(v(ML99_CHAIN_EXPR_STMT)),\
		ML99_call(v(WITH99_priv_init_resource),\
			v(tResNameArgs)\
		)\
	)

#define WITH99_PRIV_IF_ERROR(code)\
	if (!code)

#define WITH99_priv_throw_match_1_IMPL(tResNameArgs)\
	ML99_appl(ML99_reify(v(WITH99_PRIV_IF_ERROR)),\
		ML99_call(v(WITH99_priv_init_resource),\
				v(tResNameArgs)\
		)\
	)

#define WITH99_priv_create_stmt_IMPL(tResNameArgs)\
	ML99_TERMS(\
		ML99_if(\
			ML99_variadicsIsSingle(ML99_call(v(WITH99_priv_restype), v(tResNameArgs))),\
			ML99_appl(ML99_reify(v(ML99_INTRODUCE_VAR_TO_STMT)),\
				ML99_call(v(WITH99_priv_declare_resource),\
					v(tResNameArgs)\
				)\
			),\
			v()\
		),\
		ML99_boolMatchWithArgs(\
			ML99_call(\
				v(WITH99_priv_throws_resource),\
				v(tResNameArgs)\
			),\
			v(WITH99_priv_throw_match_),\
			v(tResNameArgs)\
		),\
		ML99_appl(ML99_reify(v(ML99_CHAIN_EXPR_STMT_AFTER)),\
			ML99_call(v(WITH99_priv_free_resource),\
				v(tResNameArgs)\
			)\
		)\
	)


#define WITH99_priv_create_stmt_ARITY 1

#define WITH99_With(...) ML99_EVAL(WITH99_with(__VA_ARGS__))

#define WITH99_with(...) ML99_call(WITH99_with, v(__VA_ARGS__))
#define WITH99_with_IMPL(...) ML99_variadicsForEach(v(WITH99_priv_create_stmt), v(__VA_ARGS__))

#endif