CVS log for mandoc/regress/roff/esc/unsupp.out_lint

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Default branch: MAIN
Current tag: MAIN

Revision 1.3 / (download) - annotate - [select for diffs], Sun Jun 5 13:54:15 2022 UTC (2 years ago) by schwarze
Branch: MAIN
CVS Tags: HEAD
Changes since 1.2: +2 -2 lines
Diff to previous 1.2 (colored)

With the improved escape sequence parser, it becomes easy to also improve
diagnostics.  Distinguish "incomplete escape sequence", "invalid special
character", and "unknown special character" from the generic "invalid
escape sequence", also promoting them from WARNING to ERROR because
incomplete escape sequences are severe syntax violations and because
encountering an invalid or unknown special character makes it likely
that part of the document content intended by the authors gets lost.

Revision 1.2 / (download) - annotate - [select for diffs], Thu May 19 16:19:15 2022 UTC (2 years ago) by schwarze
Branch: MAIN
Changes since 1.1: +3 -3 lines
Diff to previous 1.1 (colored)

following the fixed parsing direction of roff_expand() in roff.c rev. 1.388,
some diagnostics now appear in a more reasonable order, too

Revision 1.1 / (download) - annotate - [select for diffs], Sat Dec 15 19:30:30 2018 UTC (5 years, 6 months ago) by schwarze
Branch: MAIN
CVS Tags: VERSION_1_14_6, VERSION_1_14_5

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.

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