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added static assertion macros

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hyung-hwan 2019-08-06 03:08:36 +00:00
parent 21ec6f6c5f
commit 947dd4c5d3
1 changed files with 21 additions and 0 deletions
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21
lib/hcl-cmn.h
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@ -799,6 +799,12 @@ typedef struct hcl_t hcl_t;
# undef HCL_HAVE_INLINE
#endif
#if defined(__GNUC__) && (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 4))
# define HCL_UNUSED __attribute__((__unused__))
#else
# define HCL_UNUSED
#endif
/**
* The HCL_TYPE_IS_SIGNED() macro determines if a type is signed.
* \code
@ -1011,5 +1017,20 @@ typedef struct hcl_t hcl_t;
# define HCL_UNLIKELY(x) (x)
#endif
/* =========================================================================
* STATIC ASSERTION
* =========================================================================*/
#define HCL_STATIC_JOIN_INNER(x, y) x ## y
#define HCL_STATIC_JOIN(x, y) HCL_STATIC_JOIN_INNER(x, y)
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L)
# define HCL_STATIC_ASSERT(expr) _Static_assert (expr, "invalid assertion")
#elif defined(__cplusplus) && (__cplusplus >= 201103L)
# define HCL_STATIC_ASSERT(expr) static_assert (expr, "invalid assertion")
#else
# define HCL_STATIC_ASSERT(expr) typedef char HCL_STATIC_JOIN(HCL_STATIC_ASSERT_T_, __LINE__)[(expr)? 1: -1] HCL_UNUSED
#endif
#define HCL_STATIC_ASSERT_EXPR(expr) ((void)HCL_SIZEOF(char[(expr)? 1: -1]))
#endif