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| author | Thomas Haller <thaller@redhat.com> | 2017-10-17 19:59:53 +0200 |
|---|---|---|
| committer | Thomas Haller <thaller@redhat.com> | 2017-10-17 20:02:59 +0200 |
| commit | acbab884ee80d8816169892340dba995f23b90bc (patch) | |
| tree | 6be6f0b9e7c93a19ca8c69b4800412b7cab993ba | |
| parent | bdb8e65434e1556f0022c2f1fc5a1427e36b0976 (diff) | |
| download | NetworkManager-acbab884ee80d8816169892340dba995f23b90bc.tar.gz | |
shared: add _NM_ENSURE_TYPE() macro
| -rw-r--r-- | shared/nm-utils/nm-macros-internal.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/shared/nm-utils/nm-macros-internal.h b/shared/nm-utils/nm-macros-internal.h index 352e581365..bbdf50be71 100644 --- a/shared/nm-utils/nm-macros-internal.h +++ b/shared/nm-utils/nm-macros-internal.h @@ -288,6 +288,18 @@ NM_G_ERROR_MSG (GError *error) ((type *) (obj)) #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)) |