1assert.h(0P) POSIX Programmer's Manual assert.h(0P)
2
3
4
6 This manual page is part of the POSIX Programmer's Manual. The Linux
7 implementation of this interface may differ (consult the corresponding
8 Linux manual page for details of Linux behavior), or the interface may
9 not be implemented on Linux.
10
11
13 assert.h — verify program assertion
14
16 #include <assert.h>
17
19 The functionality described on this reference page is aligned with the
20 ISO C standard. Any conflict between the requirements described here
21 and the ISO C standard is unintentional. This volume of POSIX.1‐2008
22 defers to the ISO C standard.
23
24 The <assert.h> header shall define the assert() macro. It refers to the
25 macro NDEBUG which is not defined in the header. If NDEBUG is defined
26 as a macro name before the inclusion of this header, the assert() macro
27 shall be defined simply as:
28
29 #define assert(ignore)((void) 0)
30
31 Otherwise, the macro behaves as described in assert().
32
33 The assert() macro shall be redefined according to the current state of
34 NDEBUG each time <assert.h> is included.
35
36 The assert() macro shall be implemented as a macro, not as a function.
37 If the macro definition is suppressed in order to access an actual
38 function, the behavior is undefined.
39
40 The following sections are informative.
41
43 None.
44
46 None.
47
49 None.
50
52 The System Interfaces volume of POSIX.1‐2008, assert()
53
55 Portions of this text are reprinted and reproduced in electronic form
56 from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
57 -- Portable Operating System Interface (POSIX), The Open Group Base
58 Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
59 cal and Electronics Engineers, Inc and The Open Group. (This is
60 POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
61 event of any discrepancy between this version and the original IEEE and
62 The Open Group Standard, the original IEEE and The Open Group Standard
63 is the referee document. The original Standard can be obtained online
64 at http://www.unix.org/online.html .
65
66 Any typographical or formatting errors that appear in this page are
67 most likely to have been introduced during the conversion of the source
68 files to man page format. To report such errors, see https://www.ker‐
69 nel.org/doc/man-pages/reporting_bugs.html .
70
71
72
73IEEE/The Open Group 2013 assert.h(0P)