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.TH ASSERT 3
.SH NAME
assert \- check program invariants
.SH SYNOPSIS
.B #include <u.h>
.br
.B #include <libc.h>
.PP
.B
#define assert if(cond);else _assert("cond")
.PP
.B
void _assert(int cond)
.SH DESCRIPTION
.I Assert
is a preprocessor macro that
(via
.IR _assert )
prints a message and calls
.I abort
when
.I cond
is false.
.SH SOURCE
.B /usr/local/plan9/src/libc/port/_assert.c
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