From 9bdc68b0e9c4ef307f52f16b3727a115cf20e060 Mon Sep 17 00:00:00 2001 From: Ingo Schwarze Date: Sun, 12 Oct 2014 19:31:41 +0000 Subject: Improve error handling in the eqn(7) parser. Get rid of the first fatal error, MANDOCERR_EQNSYNT. In eqn(7), there is no need to be bug-compatible with groff, so there is no need to abondon the whole equation in case of a syntax error. In particular: * Skip "back", "delim", "down", "fwd", "gfont", "gsize", "left", "right", "size", and "up" without arguments. * Skip "gsize" and "size" with a non-numeric argument. * Skip closing delimiters that are not open. * Skip "above" outside piles. * For diacritic marks and binary operators without a left operand, default to an empty box. * Let piles and matrices take one argument rather than insisting on a braced list. Let HTML output handle that, too. * When rewinding, if the root box is guaranteed to match the termination condition, no error handling is needed. --- read.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'read.c') diff --git a/read.c b/read.c index f4a24a25..4a0ee101 100644 --- a/read.c +++ b/read.c @@ -1,4 +1,4 @@ -/* $Id: read.c,v 1.89 2014/10/11 21:14:16 schwarze Exp $ */ +/* $Id: read.c,v 1.90 2014/10/12 19:31:41 schwarze Exp $ */ /* * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons * Copyright (c) 2010-2014 Ingo Schwarze @@ -149,6 +149,7 @@ static const char * const mandocerrs[MANDOCERR_MAX] = { "missing font type, using \\fR", "unknown font type, using \\fR", "missing -std argument, adding it", + "missing eqn box, using \"\"", /* related to bad macro arguments */ "unterminated quoted argument", @@ -179,7 +180,6 @@ static const char * const mandocerrs[MANDOCERR_MAX] = { "equation scope open on exit", "overlapping equation scopes", "unexpected end of equation", - "equation syntax error", /* related to tables */ "bad table syntax", -- cgit v1.2.3