regress/roff/esc/B.in

   1 .\" $OpenBSD: B.in,v 1.3 2017/07/04 14:53:27 schwarze Exp $
   2 .Dd $Mdocdate: July 4 2017 $
   3 .Dt ESC-B 1
   4 .Os
   5 .Sh NAME
   6 .Nm esc-B
   7 .Nd the roff escape B sequence: validate numerical expression
   8 .Sh DESCRIPTION
   9 empty: \B''
  10 .br
  11 digit: \B'0'
  12 .br
  13 no number: \B'no number'
  14 .br
  15 trailing garbage: \B'1X'
  16 .br
  17 trailing operator: \B'1+'
  18 .br
  19 infix operator: \B'1+1'
  20 .br
  21 infix and trailing operator: \B'1+1+'
  22 .br
  23 chain of operations: \B'1+2+3+4'
  24 .br
  25 trailing para: \B'1+('
  26 .br
  27 unclosed para: \B'(1'
  28 .br
  29 empty pair of parentheses: \B'()'
  30 .br
  31 parentheses containing number: \B'(42)'
  32 .br
  33 complex expression: \B'3+(3*(5==5*2)*4)+(3*5)/2'
  34 .br
  35 other delimiter: \Bx1+1x
  36 .br
  37 no closing delimiter: \B'1+1