43 lines
693 B
Groff
43 lines
693 B
Groff
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.\" @(#)assert.3 6.2 (Berkeley) 5/12/86
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.\"
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.TH ASSERT 3 "May 12, 1986"
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.AT 3
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.SH NAME
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assert \- program verification
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.SH SYNOPSIS
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.nf
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.ft B
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#include <assert.h>
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void assert(int \fIexpression\fP)
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.fi
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.SH DESCRIPTION
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.B Assert
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is a macro that indicates
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.I expression
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is expected to be true at this point in the program.
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It causes an
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.BR abort (3)
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with a diagnostic comment on the standard output when
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.I expression
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is false (0).
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Compiling with the
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.BR cc (1)
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option
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.SM
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.B \-DNDEBUG
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effectively deletes
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.B assert
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from the program.
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.SH DIAGNOSTICS
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`Assertion "\fIexpression\fR" failed: file
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.I f
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line
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.IR n .'
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.I F
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is the source file and
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.I n
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the source line number of the
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.B assert
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statement.
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