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mark this function as deprecated, and put the warning first, since I

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doubt most people will read to the end...  Note the use of sys/cdefs.h
for pre-C11 compilers...

I didn't included a note about being compatibile w/ userland since a
C11 feature should be obviously usable in userland...

Suggested by:	imp
This commit is contained in:
John-Mark Gurney 2015-08-02 00:22:14 +00:00
parent 61ab25cd3d
commit 94d919b999
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=286170
1 changed files with 10 additions and 5 deletions
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15
share/man/man9/CTASSERT.9
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@ -26,7 +26,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd July 30, 2015
.Dd August 1, 2015
.Dt CTASSERT 9
.Os
.Sh NAME
@ -39,6 +39,15 @@
.Sh DESCRIPTION
The
.Fn CTASSERT
macro is deprecated and the C11 standard
.Fn _Static_assert
should be used instead.
The header
.Fa sys/cdefs.h
should be included to provide compatibility for pre-C11 compilers.
.Pp
The
.Fn CTASSERT
macro evaluates
.Fa expression
at compile time and causes a compiler error if it is false.
@ -48,10 +57,6 @@ The
macro is useful for asserting the size or alignment of important
data structures and variables during compilation, which would
otherwise cause the code to fail at run time.
.Pp
The
.Fn CTASSERT
macro is not usable in userland.
.Sh EXAMPLES
Assert that the size of the
.Vt uuid