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 9empty: \B'' 10.br 11digit: \B'0' 12.br 13no number: \B'no number' 14.br 15trailing garbage: \B'1X' 16.br 17trailing operator: \B'1+' 18.br 19infix operator: \B'1+1' 20.br 21infix and trailing operator: \B'1+1+' 22.br 23chain of operations: \B'1+2+3+4' 24.br 25trailing para: \B'1+(' 26.br 27unclosed para: \B'(1' 28.br 29empty pair of parentheses: \B'()' 30.br 31parentheses containing number: \B'(42)' 32.br 33complex expression: \B'3+(3*(5==5*2)*4)+(3*5)/2' 34.br 35other delimiter: \Bx1+1x 36.br 37no closing delimiter: \B'1+1 38