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. --- mdoc_markdown.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'mdoc_markdown.c') diff --git a/mdoc_markdown.c b/mdoc_markdown.c index fcc63638..35bae5bc 100644 --- a/mdoc_markdown.c +++ b/mdoc_markdown.c @@ -1,4 +1,4 @@ -/* $Id: mdoc_markdown.c,v 1.28 2018/12/03 21:00:10 schwarze Exp $ */ +/* $Id: mdoc_markdown.c,v 1.29 2018/12/15 19:30:26 schwarze Exp $ */ /* * Copyright (c) 2017, 2018 Ingo Schwarze * @@ -589,6 +589,9 @@ md_word(const char *s) case ESCAPE_SPECIAL: uc = mchars_spec2cp(seq, sz); break; + case ESCAPE_UNDEF: + uc = *seq; + break; case ESCAPE_DEVICE: md_rawword("markdown"); continue; -- cgit v1.2.3