regress/roff/string/undef.in

   1 .\" $OpenBSD: std.in,v 1.2 2017/07/04 14:53:27 schwarze Exp $
   2 .TH STRING-UNDEF 1 "April 9, 2018"
   3 .SH NAME
   4 string-undef - expanding undefined strings
   5 .SH DESCRIPTION
   6 .SS User defined string
   7 The sting "mys" is
   8 .ie dmys defined
   9 .el undefined
  10 and remains
  11 .ie dmys defined.
  12 .el undefined.
  13 .PP
  14 Its value is "\*[mys]", and now it is
  15 .ie dmys defined,
  16 .el undefined,
  17 and its value is still "\*[mys]".
  18 .PP
  19 .ds mys newval
  20 After redefining it to "\*[mys]", it is of course still
  21 .ie dmys defined.
  22 .el undefined.
  23 .PP
  24 .rm mys
  25 After removing the definition, it is now
  26 .ie dmys defined.
  27 .el undefined.
  28 .SS User defined macro
  29 The macro "mym" is
  30 .ie dmym defined.
  31 .el undefined.
  32 .PP
  33 It has no effect:
  34 .mym
  35 But now it is
  36 .ie dmym defined.
  37 .el undefined.
  38 .PP
  39 .de mym
  40 neweffect
  41 ..
  42 After defining it as:
  43 .mym
  44 it is of course still
  45 .ie dmym defined.
  46 .el undefined.
  47 .PP
  48 .rm mym
  49 After removing the definition, it is now
  50 .ie dmym defined.
  51 .el undefined.
  52 .SS Renamed macro
  53 The standard .BR macro is
  54 .ie dBR defined,
  55 .el undefined,
  56 and it
  57 .BR works .
  58 .PP
  59 .rn BR newBR
  60 After renaming it, the new name is
  61 .ie dnewBR defined,
  62 .el undefined,
  63 and
  64 .newBR works .
  65 .SS Predefined string
  66 A predefined string is
  67 .ie dR defined
  68 .el undefined
  69 and has the value "\*R".