Rudimentary implementation of the roff(7) .while request.

Needed for example by groff_hdtbl(7).

There are two limitations:
It does not support nested .while requests yet,
and each .while loop must start and end in the same scope.

The roff_parseln() return codes are now more flexible
and allow OR'ing options.

1 files changed, 4 insertions, 0 deletions

diff --git a/mandoc.h b/mandoc.h
index e618d97a..38733dc4 100644
--- a/mandoc.h
+++ b/mandoc.h
@@ -228,6 +228,10 @@ enum	mandocerr {
 	MANDOCERR_TOOLARGE, /* input too large */
 	MANDOCERR_CHAR_UNSUPP, /* unsupported control character: number */
 	MANDOCERR_REQ_UNSUPP, /* unsupported roff request: request */
+	MANDOCERR_WHILE_NEST, /* nested .while loops */
+	MANDOCERR_WHILE_OUTOF, /* end of scope with open .while loop */
+	MANDOCERR_WHILE_INTO, /* end of .while loop in inner scope */
+	MANDOCERR_WHILE_FAIL, /* cannot continue this .while loop */
 	MANDOCERR_TBLOPT_EQN, /* eqn delim option in tbl: arg */
 	MANDOCERR_TBLLAYOUT_MOD, /* unsupported tbl layout modifier: m */
 	MANDOCERR_TBLMACRO, /* ignoring macro in table: macro */