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+.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
+.TH "ASSERT" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\" assert
+.SH NAME
+assert \- insert program diagnostics
+.SH SYNOPSIS
+.LP
+\fB#include <assert.h>
+.br
+.sp
+void assert(scalar\fP \fIexpression\fP\fB);
+.br
+\fP
+.SH DESCRIPTION
+.LP
+The \fIassert\fP() macro shall insert diagnostics into programs; it
+shall expand to a \fBvoid\fP expression. When it is
+executed, if \fIexpression\fP (which shall have a \fBscalar\fP type)
+is false (that is, compares equal to 0), \fIassert\fP()
+shall write information about the particular call that failed on \fIstderr\fP
+and shall call \fIabort\fP().
+.LP
+The information written about the call that failed shall include the
+text of the argument, the name of the source file, the
+source file line number, and the name of the enclosing function; the
+latter are, respectively, the values of the preprocessing
+macros __FILE__ and __LINE__ and of the identifier __func__.
+.LP
+Forcing a definition of the name NDEBUG, either from the compiler
+command line or with the preprocessor control statement
+\fB#define\fP NDEBUG ahead of the \fB#include\fP \fI<assert.h>\fP
+statement, shall
+stop assertions from being compiled into the program.
+.SH RETURN VALUE
+.LP
+The \fIassert\fP() macro shall not return a value.
+.SH ERRORS
+.LP
+No errors are defined.
+.LP
+\fIThe following sections are informative.\fP
+.SH EXAMPLES
+.LP
+None.
+.SH APPLICATION USAGE
+.LP
+None.
+.SH RATIONALE
+.LP
+None.
+.SH FUTURE DIRECTIONS
+.LP
+None.
+.SH SEE ALSO
+.LP
+\fIabort\fP() , \fIstderr\fP, the Base Definitions volume of IEEE\ Std\ 1003.1-2001,
+\fI<assert.h>\fP
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
+Electrical and Electronics Engineers, Inc and The Open Group. In the
+event of any discrepancy between this version and the original IEEE and
+The Open Group Standard, the original IEEE and The Open Group Standard
+is the referee document. The original Standard can be obtained online at
+http://www.opengroup.org/unix/online.html .