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* [Bug preprocessor/47823] New: #pragma once not documented
@ 2011-02-20 15:20 olafvdspek at gmail dot com
2011-02-20 20:42 ` [Bug preprocessor/47823] " pinskia at gcc dot gnu.org
2012-01-28 19:16 ` [Bug preprocessor/47823] #pragma once is documented in a weird spot pinskia at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: olafvdspek at gmail dot com @ 2011-02-20 15:20 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47823
Summary: #pragma once not documented
Product: gcc
Version: 4.5.2
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: preprocessor
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: olafvdspek@gmail.com
#pragma once appears to be undocumented
http://gcc.gnu.org/onlinedocs/gcc-4.5.2/gcc/Pragmas.html
^ permalink raw reply [flat|nested] 3+ messages in thread* [Bug preprocessor/47823] #pragma once not documented 2011-02-20 15:20 [Bug preprocessor/47823] New: #pragma once not documented olafvdspek at gmail dot com @ 2011-02-20 20:42 ` pinskia at gcc dot gnu.org 2012-01-28 19:16 ` [Bug preprocessor/47823] #pragma once is documented in a weird spot pinskia at gcc dot gnu.org 1 sibling, 0 replies; 3+ messages in thread From: pinskia at gcc dot gnu.org @ 2011-02-20 20:42 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47823 --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-02-20 20:40:03 UTC --- At one point it was documented in the C preprocessor manual but it is no longer documented there. ^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug preprocessor/47823] #pragma once is documented in a weird spot 2011-02-20 15:20 [Bug preprocessor/47823] New: #pragma once not documented olafvdspek at gmail dot com 2011-02-20 20:42 ` [Bug preprocessor/47823] " pinskia at gcc dot gnu.org @ 2012-01-28 19:16 ` pinskia at gcc dot gnu.org 1 sibling, 0 replies; 3+ messages in thread From: pinskia at gcc dot gnu.org @ 2012-01-28 19:16 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47823 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |documentation Status|UNCONFIRMED |NEW Last reconfirmed| |2012-01-28 Summary|#pragma once not documented |#pragma once is documented | |in a weird spot Ever Confirmed|0 |1 --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-01-28 19:01:42 UTC --- Confirmed really it is documented but just under #import documentation. It really should be under its own: Another way to prevent a header file from being included more than once is with the @samp{#pragma once} directive. If @samp{#pragma once} is seen when scanning a header file, that file will never be read again, no matter what. @samp{#pragma once} does not have the problems that @samp{#import} does, but it is not recognized by all preprocessors, so you cannot rely on it in a portable program. ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2012-01-28 19:01 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2011-02-20 15:20 [Bug preprocessor/47823] New: #pragma once not documented olafvdspek at gmail dot com 2011-02-20 20:42 ` [Bug preprocessor/47823] " pinskia at gcc dot gnu.org 2012-01-28 19:16 ` [Bug preprocessor/47823] #pragma once is documented in a weird spot pinskia at gcc dot gnu.org
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