Mercurial > hg > octave-lojdl > gnulib-hg
changeset 14142:39695edaade5
ignore-value: clarify some comments
* lib/ignore-value.h: Add Eric Blake as an author since
he rewrote the macros.
(ignore_value): Specify exactly when the GCC warn_unused_result
feature became available.
(ignore_ptr): Mention that ignore_value supports aggregates.
| author | Pádraig Brady <P@draigBrady.com> |
|---|---|
| date | Fri, 07 Jan 2011 01:25:06 +0000 |
| parents | bc576551c57c |
| children | a7da48531863 |
| files | ChangeLog lib/ignore-value.h |
| diffstat | 2 files changed, 15 insertions(+), 3 deletions(-) [+] |
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--- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,11 @@ +2011-01-07 Pádraig Brady <P@draigBrady.com> + + ignore-value: fixup comments, and add Eric Blake + as an author since he rewrote the macros. + * lib/ignore-value.h (ignore_value): State that + we now support aggregates. Also specify exactly + when the GCC warn_unused_result feature was added. + 2011-01-06 Eric Blake <eblake@redhat.com> ignore-value: support aggregate types
--- a/lib/ignore-value.h +++ b/lib/ignore-value.h @@ -15,7 +15,7 @@ You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ -/* Written by Jim Meyering and Pádraig Brady. */ +/* Written by Jim Meyering, Eric Blake and Pádraig Brady. */ /* Use "ignore_value" to avoid a warning when using a function declared with gcc's warn_unused_result attribute, but for which you really do want to @@ -47,13 +47,17 @@ # endif # endif -# if __GNUC__ < 3 || (__GNUC__ == 3 && __GNUC_MINOR__ < 1) +/* The __attribute__((__warn_unused_result__)) feature + is available in gcc versions 3.4 and newer, + while the typeof feature has been available since 2.7 at least. */ +# if __GNUC__ < 3 || (__GNUC__ == 3 && __GNUC_MINOR__ < 4) # define ignore_value(x) ((void) (x)) # else # define ignore_value(x) (({ __typeof__ (x) __x = (x); (void) __x; })) # endif -/* ignore_value works for both scalars and pointers; deprecate ignore_ptr. */ +/* ignore_value works for scalars, pointers and aggregates; + deprecate ignore_ptr. */ static inline void ATTRIBUTE_DEPRECATED ignore_ptr (void *p) { (void) p; } /* deprecated: use ignore_value */