4.4BSD/usr/share/man/cat3/assert.0

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ASSERT(3)                   BSD Programmer's Manual                  ASSERT(3)

NNAAMMEE
     aasssseerrtt - expression verification macro

SSYYNNOOPPSSIISS
     ##iinncclluuddee <<aasssseerrtt..hh>>

     aasssseerrtt(_e_x_p_r_e_s_s_i_o_n);

DDEESSCCRRIIPPTTIIOONN
     The aasssseerrtt() macro tests the given _e_x_p_r_e_s_s_i_o_n and if it is false, the
     calling process is terminated.  A diagnostic message is written to the
     _s_t_d_e_r_r and the function _exit(2) is called effectively terminating the
     program.

     If _e_x_p_r_e_s_s_i_o_n is true, the aasssseerrtt() macro does nothing.

     The aasssseerrtt() macro may be removed at compile time with the --NNDDEEBBUUGG op-
     tion, see cc(1).

DDIIAAGGNNOOSSTTIICCSS
     The following diagnostic message is written to _s_t_d_e_r_r if _e_x_p_r_e_s_s_i_o_n is
     false:

           "assertion \"%s\" failed: file \"%s\", line %d0, \
                               "expression", __FILE__, __LINE__);

HHIISSTTOORRYY
     A aasssseerrtt macro appeared in Version 6 AT&T UNIX.

4.4BSD                           June 9, 1993                                1