1 08/17/80  active_function.compin
 2 
 3 Syntax:  .ifi active_function "active function usage line"
 4       OR .ifi AF              "active function usage line"
 5 
 6 
 7 Function:
 8 This macro places an active function usage syntax description on the
 9 page.
10 
11 
12 Macro action:
13 1) inserts 24pt. of white space
14 2) emits the label "SYNTAX AS AN ACTIVE FUNCTION" in 10pt Helvetica
15    Bold Italic flush left, followed by white space appropriate for the
16    device
17 3) formats "active function usage line" in 10pt Helvetica (also see
18    Notes) at the first indentation level
19 
20 
21 Notes:
22 1) If "active function usage line" contains white space, it must be
23    given as a quoted string.
24 2) "active function usage line" may contain both literal fields and
25    variable fields.  These fields are distinguished in the output by
26    presenting the variable fields in 10pt Helvetica Bold Italc instead
27    of Roman.  Variable fields are denoted by enclosing them between
28    tilde (~) characters.  For example
29 
30       "[active_function ~args~ {-~control_args~}]"
31 
32    will present "active_function" in Roman and "arg" and "control_args"
33    in Bold Italic.
34 
35 (END)