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#ifndef MACRO_H
#define MACRO_H
/*
* NOTE This file uses __VA_OPT__. This is not standard compliant.
*/
/*
* Token paste
*/
#define TP(a, b) a ## b
#define TP3(a, b, c) a ## b ## c
#define TP4(a, b, c, d) a ## b ## c ## d
#define TP5(a, b, c, d, e) a ## b ## c ## d ## e
/*
* Get length of __VA_ARGS__
* Borrowed fram:
* https://stackoverflow.com/a/35986932
*/
#define VA_ARGS_NUM_PRIV(P1, P2, P3, P4, P5, P6, Pn, ...) Pn
#define VA_ARGS_NUM(...) VA_ARGS_NUM_PRIV(-1, ## __VA_ARGS__, 5, 4, 3, 2, 1, 0)
#define NEW_HELPER(T, ARG_COUNT) \
TP3(T, _init_, ARG_COUNT)
/* Constructor type name */
#define __INIT_T(T, C) TP3(T, __init__, C)
/* Returns full type of constructor */
#define INIT_F(T, ...) \
int __INIT_T(T, VA_ARGS_NUM(__VA_ARGS__)) (T* this __VA_OPT__(,) __VA_ARGS__)
/* Call the constructor of an object */
#define INIT(T, N, ...) \
__INIT_T(T, VA_ARGS_NUM(__VA_ARGS__)) (N __VA_OPT__(,) __VA_ARGS__)
/* Allocate a new object on the HEAP */
#define NEW(T, N, ...) \
T* N = malloc(sizeof(*N)); \
INIT(T, N, __VA_ARGS__);
/* Allocate a new object on the STACK */
#define SNEW(T, N, ...) \
T N; \
INIT(T, & N, __VA_ARGS__);
/* Destructor for type */
#define FREE(T) TP(T, __free)
/* Call destructor for type, and free object */
#define FFREE(T, N) do { FREE(T)(N); free(N); } while (0)
/* Declare destructor */
#define FREE_F(T) int TP(T, __free) (T* this)
#define DEEP_COPY(T) TP(deep_copy__, T)
#define RESOLVE(T) TP(resolve__, T)
#define APPEND(T) TP(append__, T)
#endif /* MACRO_H */
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