1.\" $OpenBSD: B.in,v 1.4 2022/06/08 13:08:00 schwarze Exp $ 2.Dd $Mdocdate: June 8 2022 $ 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.Ss Argument delimiters 37unsupported \e!: \B\!42\!u 38.br 39unsupported \er: \B\r42u 40.br 41ignored \e%: \B\%42\%u 42.br 43ignored \e&: \B\&42\&u 44.br 45ignored \e): \B\)42\)u 46.br 47ignored \e,: \B\,42\,u 48.br 49ignored \e/: \B\/42\/u 50.br 51ignored \e^: \B\^42\^u 52.br 53ignored \ea: \B\a42\au 54.br 55ignored \ed: \B\d42\du 56.br 57ignored \et: \B\t42\tu 58.br 59ignored \eu: \B\u42\uu 60.br 61ignored \e{: \B\{42\{u 62.br 63ignored \e|: \B\|42\|u 64.br 65ignored \e}: \B\}42\}u 66.br 67useless \e.: \B\.42.u 68.\".br 69.\"XXX useless \e\e: \B\\42\\u 70.br 71invalid \eG: \B\G42Gu 72.br 73special \e\ : \B\ 42\ u 74.br 75special \e\(aq: \B\'42\'u 76.br 77special \e-: \B\-42\-u 78.br 79special \e0: \B\042\0u 80.br 81special \e:: \B\:42\:u 82.br 83special \e_: \B\_42\_u 84.br 85special \e\(ga: \B\`42\`u 86.br 87special \ee: \B\e42\eu 88.br 89special \e~: \B\~42\~u 90.br 91break \ep: \B\p42\pu 92.br 93nospace \ec: \B\c42\cu 94.\".br 95.\"XXX skipchar \ec: \B\z42\zu 96.br 97.ds mystr x42xu 98string expansion: \B\*[mystr] 99.br 100.nr myreg 23 101register expansion: \B\n[myreg]u 102.br 103ignored \eO: \B\O142\O2u 104.br 105ignored \eY: \B\Y[mystr]42\Y[mystr]u 106.br 107ignored \ek: \B\k[myreg]42\k[myreg]u 108.br 109special character: \B\(hy42\(hyu 110.br 111ignored \eD: \B\D't 1'42\D't 2'u 112.br 113ignored \eL: \B\L'2'42u 114.br 115ignored \eX: \B\X'foo'42\X'bar'u 116.br 117ignored \eZ: \B\Z'foo'42\Z''u 118.br 119ignored \eb: \B\b'2'42\b''u 120.br 121ignored \ev: \B\v'2'42\v'0'u 122.br 123ignored \ex: \B\x'2'42\v'0'u 124.br 125horizontal motion: \B\h'1'42\h'3'u 126.br 127horizontal line: \B\l'4'42\l'2'u 128.br 129overstrike: \B\o'ab'42\o'cd'u 130