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shared: add _NM_ENSURE_TYPE() macro

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Thomas Haller
2017-10-17 19:59:53 +02:00
parent bdb8e65434
commit acbab884ee
1 changed files with 12 additions and 0 deletions
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12
shared/nm-utils/nm-macros-internal.h
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@@ -288,6 +288,18 @@ NM_G_ERROR_MSG (GError *error)
((type *) (obj)) ((type *) (obj))
#endif #endif
#if _NM_CC_SUPPORT_GENERIC
/* returns @value, if the type of @value matches @type.
* This requires support for C11 _Generic(). If no support is
* present, this returns @value directly.
*
* It's useful to check the let the compiler ensure that @value is
* of a certain type. */
#define _NM_ENSURE_TYPE(type, value) (_Generic ((value), type: (value)))
#else
#define _NM_ENSURE_TYPE(type, value) (value)
#endif
/*****************************************************************************/ /*****************************************************************************/
#define _NM_IN_SET_EVAL_1( op, _x, y) (_x == (y)) #define _NM_IN_SET_EVAL_1( op, _x, y) (_x == (y))