From d672f8cb82878baf3834e938c4c416f4493952cf Mon Sep 17 00:00:00 2001 From: Ingo Schwarze Date: Sat, 15 Dec 2018 19:30:25 +0000 Subject: Several improvements to escape sequence handling. * Add the missing special character \_ (underscore). * Partial implementations of \a (leader character) and \E (uninterpreted escape character). * Parse and ignore \r (reverse line feed). * Add a WARNING message about undefined escape sequences. * Add an UNSUPP message about unsupported escape sequences. * Mark \! and \? (transparent throughput) and \O (suppress output) as unsupported. * Treat the various variants of zero-width spaces as one-byte escape sequences rather than as special characters, to avoid defining bogus forms with square brackets. * For special characters with one-byte names, do not define bogus forms with square brackets, except for \[-], which is valid. * In the form with square brackets, undefined special characters do not fall back to printing the name verbatim, not even for one-byte names. * Starting a special character name with a blank is an error. * Undefined escape sequences never abort formatting of the input string, not even in HTML output mode. * Document the newly handled escapes, and a few that were missing. * Regression tests for most of the above. --- regress/roff/esc/ignore.in | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-) (limited to 'regress/roff/esc/ignore.in') diff --git a/regress/roff/esc/ignore.in b/regress/roff/esc/ignore.in index d41be2e1..48507f44 100644 --- a/regress/roff/esc/ignore.in +++ b/regress/roff/esc/ignore.in @@ -1,15 +1,13 @@ .\" $OpenBSD: ignore.in,v 1.3 2017/07/04 14:53:27 schwarze Exp $ -.Dd $Mdocdate: July 4 2017 $ -.Dt ESC-IGNORE 1 -.Os -.Sh NAME -.Nm esc-ignore -.Nd ignored roff escape sequences -.Sh DESCRIPTION +.TH ESC-IGNORE 1 "December 15, 2018" +.SH NAME +esc-ignore \- ignored roff escape sequences +.SH DESCRIPTION +.nf +closing parenthesis: a\)b\[)]c +comma: a\,b\[,]c +slash: a\/b\[/]c multiform: a\kxb\k(xyc\k[xyz]d -.br quoted: a\R'myreg 0'b\R'myreg \A'y'0'c -.br sizes: a\s0b\s(12c\s[123]d\s'123'e\s'1\w'xy'2'f -.br signed sizes: a\s-0b\s-(12c\s-[123]d\s-'123'e\s-'1\w'xy'2'f\s- -- cgit v1.2.3-56-ge451