Enforce proper ordering of heading levels: specifically, ensure the

user doesn't skip a heading level (\H before any \C or \A, or \S
straight after \C with no intervening \H). The precise criterion is
that when creating section a.b.c.d, sections a.b.c, a.b and a should
already exist. This ensures the section tree really is a properly
formed tree with no missing nodes.

[originally from svn r1329]

1 files changed, 5 insertions, 0 deletions

diff --git a/error.c b/error.c
index b4a3898..c81aa8c 100644
--- a/error.c
+++ b/error.c
@@ -162,6 +162,11 @@ static void do_error(int code, va_list ap) {
 	sprintf(error, "macro `%.200s' already defined", sp);
 	flags = FILEPOS;
 	break;
+      case err_sectjump:
+	fpos = *va_arg(ap, filepos *);
+	sprintf(error, "expected higher heading levels before this one");
+	flags = FILEPOS;
+	break;
       case err_whatever:
 	sp = va_arg(ap, char *);
         vsprintf(error, sp, ap);