===================================================================
RCS file: /cvs/mandoc/mdoc_validate.c,v
retrieving revision 1.267
retrieving revision 1.286
diff -u -p -r1.267 -r1.286
--- mandoc/mdoc_validate.c	2015/02/04 16:38:56	1.267
+++ mandoc/mdoc_validate.c	2015/04/18 16:06:41	1.286
@@ -1,4 +1,4 @@
-/*	$Id: mdoc_validate.c,v 1.267 2015/02/04 16:38:56 schwarze Exp $ */
+/*	$Id: mdoc_validate.c,v 1.286 2015/04/18 16:06:41 schwarze Exp $ */
 /*
  * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010-2015 Ingo Schwarze <schwarze@openbsd.org>
@@ -8,9 +8,9 @@
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
@@ -31,16 +31,17 @@
 #include <string.h>
 #include <time.h>
 
-#include "mdoc.h"
-#include "mandoc.h"
 #include "mandoc_aux.h"
-#include "libmdoc.h"
+#include "mandoc.h"
+#include "roff.h"
+#include "mdoc.h"
 #include "libmandoc.h"
+#include "libmdoc.h"
 
 /* FIXME: .Bl -diag can't have non-text children in HEAD. */
 
-#define	PRE_ARGS  struct mdoc *mdoc, struct mdoc_node *n
-#define	POST_ARGS struct mdoc *mdoc
+#define	PRE_ARGS  struct roff_man *mdoc, struct roff_node *n
+#define	POST_ARGS struct roff_man *mdoc
 
 enum	check_ineq {
 	CHECK_LT,
@@ -56,22 +57,15 @@ struct	valids {
 	v_post	 post;
 };
 
-static	void	 check_count(struct mdoc *, enum mdoc_type,
-			enum check_ineq, int);
-static	void	 check_text(struct mdoc *, int, int, char *);
-static	void	 check_argv(struct mdoc *,
-			struct mdoc_node *, struct mdoc_argv *);
-static	void	 check_args(struct mdoc *, struct mdoc_node *);
-static	int	 child_an(const struct mdoc_node *);
-static	enum mdoc_sec	a2sec(const char *);
-static	size_t		macro2len(enum mdoct);
+static	void	 check_text(struct roff_man *, int, int, char *);
+static	void	 check_argv(struct roff_man *,
+			struct roff_node *, struct mdoc_argv *);
+static	void	 check_args(struct roff_man *, struct roff_node *);
+static	int	 child_an(const struct roff_node *);
+static	enum roff_sec	a2sec(const char *);
+static	size_t		macro2len(int);
 static	void	 rewrite_macro2len(char **);
 
-static	void	 bwarn_ge1(POST_ARGS);
-static	void	 ewarn_eq1(POST_ARGS);
-static	void	 ewarn_ge1(POST_ARGS);
-static	void	 hwarn_eq0(POST_ARGS);
-
 static	void	 post_an(POST_ARGS);
 static	void	 post_at(POST_ARGS);
 static	void	 post_bf(POST_ARGS);
@@ -94,7 +88,6 @@ static	void	 post_fn(POST_ARGS);
 static	void	 post_fname(POST_ARGS);
 static	void	 post_fo(POST_ARGS);
 static	void	 post_hyph(POST_ARGS);
-static	void	 post_hyphtext(POST_ARGS);
 static	void	 post_ignpar(POST_ARGS);
 static	void	 post_it(POST_ARGS);
 static	void	 post_lb(POST_ARGS);
@@ -152,12 +145,12 @@ static	const struct valids mdoc_valids[MDOC_MAX] = {
 	{ NULL, NULL },				/* Ev */
 	{ pre_std, post_ex },			/* Ex */
 	{ NULL, post_fa },			/* Fa */
-	{ NULL, ewarn_ge1 },			/* Fd */
+	{ NULL, NULL },				/* Fd */
 	{ NULL, NULL },				/* Fl */
 	{ NULL, post_fn },			/* Fn */
 	{ NULL, NULL },				/* Ft */
 	{ NULL, NULL },				/* Ic */
-	{ NULL, ewarn_eq1 },			/* In */
+	{ NULL, NULL },				/* In */
 	{ NULL, post_defaults },		/* Li */
 	{ NULL, post_nd },			/* Nd */
 	{ NULL, post_nm },			/* Nm */
@@ -168,18 +161,18 @@ static	const struct valids mdoc_valids[MDOC_MAX] = {
 	{ NULL, post_st },			/* St */
 	{ NULL, NULL },				/* Va */
 	{ NULL, post_vt },			/* Vt */
-	{ NULL, ewarn_ge1 },			/* Xr */
-	{ NULL, ewarn_ge1 },			/* %A */
-	{ NULL, post_hyphtext },		/* %B */ /* FIXME: can be used outside Rs/Re. */
-	{ NULL, ewarn_ge1 },			/* %D */
-	{ NULL, ewarn_ge1 },			/* %I */
-	{ NULL, ewarn_ge1 },			/* %J */
-	{ NULL, post_hyphtext },		/* %N */
-	{ NULL, post_hyphtext },		/* %O */
-	{ NULL, ewarn_ge1 },			/* %P */
-	{ NULL, post_hyphtext },		/* %R */
-	{ NULL, post_hyphtext },		/* %T */ /* FIXME: can be used outside Rs/Re. */
-	{ NULL, ewarn_ge1 },			/* %V */
+	{ NULL, NULL },				/* Xr */
+	{ NULL, NULL },				/* %A */
+	{ NULL, post_hyph },			/* %B */ /* FIXME: can be used outside Rs/Re. */
+	{ NULL, NULL },				/* %D */
+	{ NULL, NULL },				/* %I */
+	{ NULL, NULL },				/* %J */
+	{ NULL, post_hyph },			/* %N */
+	{ NULL, post_hyph },			/* %O */
+	{ NULL, NULL },				/* %P */
+	{ NULL, post_hyph },			/* %R */
+	{ NULL, post_hyph },			/* %T */ /* FIXME: can be used outside Rs/Re. */
+	{ NULL, NULL },				/* %V */
 	{ NULL, NULL },				/* Ac */
 	{ NULL, NULL },				/* Ao */
 	{ NULL, NULL },				/* Aq */
@@ -241,21 +234,21 @@ static	const struct valids mdoc_valids[MDOC_MAX] = {
 	{ NULL, NULL },				/* Brq */
 	{ NULL, NULL },				/* Bro */
 	{ NULL, NULL },				/* Brc */
-	{ NULL, ewarn_ge1 },			/* %C */
+	{ NULL, NULL },				/* %C */
 	{ pre_obsolete, post_es },		/* Es */
 	{ pre_obsolete, post_en },		/* En */
 	{ NULL, NULL },				/* Dx */
-	{ NULL, ewarn_ge1 },			/* %Q */
+	{ NULL, NULL },				/* %Q */
 	{ NULL, post_par },			/* br */
 	{ NULL, post_par },			/* sp */
-	{ NULL, ewarn_eq1 },			/* %U */
+	{ NULL, NULL },				/* %U */
 	{ NULL, NULL },				/* Ta */
 	{ NULL, NULL },				/* ll */
 };
 
 #define	RSORD_MAX 14 /* Number of `Rs' blocks. */
 
-static	const enum mdoct rsord[RSORD_MAX] = {
+static	const int rsord[RSORD_MAX] = {
 	MDOC__A,
 	MDOC__T,
 	MDOC__B,
@@ -300,19 +293,20 @@ static	const char * const secnames[SEC__MAX] = {
 
 
 void
-mdoc_valid_pre(struct mdoc *mdoc, struct mdoc_node *n)
+mdoc_valid_pre(struct roff_man *mdoc, struct roff_node *n)
 {
 	v_pre	 p;
 
 	switch (n->type) {
-	case MDOC_TEXT:
-		check_text(mdoc, n->line, n->pos, n->string);
+	case ROFFT_TEXT:
+		if (n->sec != SEC_SYNOPSIS || n->parent->tok != MDOC_Fd)
+			check_text(mdoc, n->line, n->pos, n->string);
 		/* FALLTHROUGH */
-	case MDOC_TBL:
+	case ROFFT_TBL:
 		/* FALLTHROUGH */
-	case MDOC_EQN:
+	case ROFFT_EQN:
 		/* FALLTHROUGH */
-	case MDOC_ROOT:
+	case ROFFT_ROOT:
 		return;
 	default:
 		break;
@@ -325,24 +319,24 @@ mdoc_valid_pre(struct mdoc *mdoc, struct mdoc_node *n)
 }
 
 void
-mdoc_valid_post(struct mdoc *mdoc)
+mdoc_valid_post(struct roff_man *mdoc)
 {
-	struct mdoc_node *n;
+	struct roff_node *n;
 	v_post p;
 
 	n = mdoc->last;
 	if (n->flags & MDOC_VALID)
 		return;
-	n->flags |= MDOC_VALID;
+	n->flags |= MDOC_VALID | MDOC_ENDED;
 
 	switch (n->type) {
-	case MDOC_TEXT:
+	case ROFFT_TEXT:
 		/* FALLTHROUGH */
-	case MDOC_EQN:
+	case ROFFT_EQN:
 		/* FALLTHROUGH */
-	case MDOC_TBL:
+	case ROFFT_TBL:
 		break;
-	case MDOC_ROOT:
+	case ROFFT_ROOT:
 		post_root(mdoc);
 		break;
 	default:
@@ -368,67 +362,8 @@ mdoc_valid_post(struct mdoc *mdoc)
 }
 
 static void
-check_count(struct mdoc *mdoc, enum mdoc_type type,
-	enum check_ineq ineq, int val)
+check_args(struct roff_man *mdoc, struct roff_node *n)
 {
-	const char	*p;
-
-	if (mdoc->last->type != type)
-		return;
-
-	switch (ineq) {
-	case CHECK_LT:
-		p = "less than ";
-		if (mdoc->last->nchild < val)
-			return;
-		break;
-	case CHECK_GT:
-		p = "more than ";
-		if (mdoc->last->nchild > val)
-			return;
-		break;
-	case CHECK_EQ:
-		p = "";
-		if (val == mdoc->last->nchild)
-			return;
-		break;
-	default:
-		abort();
-		/* NOTREACHED */
-	}
-
-	mandoc_vmsg(MANDOCERR_ARGCWARN, mdoc->parse, mdoc->last->line,
-	    mdoc->last->pos, "want %s%d children (have %d)",
-	    p, val, mdoc->last->nchild);
-}
-
-static void
-bwarn_ge1(POST_ARGS)
-{
-	check_count(mdoc, MDOC_BODY, CHECK_GT, 0);
-}
-
-static void
-ewarn_eq1(POST_ARGS)
-{
-	check_count(mdoc, MDOC_ELEM, CHECK_EQ, 1);
-}
-
-static void
-ewarn_ge1(POST_ARGS)
-{
-	check_count(mdoc, MDOC_ELEM, CHECK_GT, 0);
-}
-
-static void
-hwarn_eq0(POST_ARGS)
-{
-	check_count(mdoc, MDOC_HEAD, CHECK_EQ, 0);
-}
-
-static void
-check_args(struct mdoc *mdoc, struct mdoc_node *n)
-{
 	int		 i;
 
 	if (NULL == n->args)
@@ -440,7 +375,7 @@ check_args(struct mdoc *mdoc, struct mdoc_node *n)
 }
 
 static void
-check_argv(struct mdoc *mdoc, struct mdoc_node *n, struct mdoc_argv *v)
+check_argv(struct roff_man *mdoc, struct roff_node *n, struct mdoc_argv *v)
 {
 	int		 i;
 
@@ -449,7 +384,7 @@ check_argv(struct mdoc *mdoc, struct mdoc_node *n, str
 }
 
 static void
-check_text(struct mdoc *mdoc, int ln, int pos, char *p)
+check_text(struct roff_man *mdoc, int ln, int pos, char *p)
 {
 	char		*cp;
 
@@ -464,13 +399,13 @@ check_text(struct mdoc *mdoc, int ln, int pos, char *p
 static void
 pre_display(PRE_ARGS)
 {
-	struct mdoc_node *node;
+	struct roff_node *node;
 
-	if (MDOC_BLOCK != n->type)
+	if (n->type != ROFFT_BLOCK)
 		return;
 
 	for (node = mdoc->last->parent; node; node = node->parent)
-		if (MDOC_BLOCK == node->type)
+		if (node->type == ROFFT_BLOCK)
 			if (MDOC_Bd == node->tok)
 				break;
 
@@ -483,24 +418,13 @@ pre_display(PRE_ARGS)
 static void
 pre_bl(PRE_ARGS)
 {
-	struct mdoc_node *np;
 	struct mdoc_argv *argv, *wa;
 	int		  i;
 	enum mdocargt	  mdoclt;
 	enum mdoc_list	  lt;
 
-	if (MDOC_BLOCK != n->type) {
-		if (ENDBODY_NOT != n->end) {
-			assert(n->pending);
-			np = n->pending->parent;
-		} else
-			np = n->parent;
-
-		assert(np);
-		assert(MDOC_BLOCK == np->type);
-		assert(MDOC_Bl == np->tok);
+	if (n->type != ROFFT_BLOCK)
 		return;
-	}
 
 	/*
 	 * First figure out which kind of list to use: bind ourselves to
@@ -676,25 +600,14 @@ pre_bl(PRE_ARGS)
 static void
 pre_bd(PRE_ARGS)
 {
-	struct mdoc_node *np;
 	struct mdoc_argv *argv;
 	int		  i;
 	enum mdoc_disp	  dt;
 
 	pre_literal(mdoc, n);
 
-	if (MDOC_BLOCK != n->type) {
-		if (ENDBODY_NOT != n->end) {
-			assert(n->pending);
-			np = n->pending->parent;
-		} else
-			np = n->parent;
-
-		assert(np);
-		assert(MDOC_BLOCK == np->type);
-		assert(MDOC_Bd == np->tok);
+	if (n->type != ROFFT_BLOCK)
 		return;
-	}
 
 	for (i = 0; n->args && i < (int)n->args->argc; i++) {
 		argv = n->args->argv + i;
@@ -806,7 +719,7 @@ static void
 pre_obsolete(PRE_ARGS)
 {
 
-	if (MDOC_ELEM == n->type || MDOC_BLOCK == n->type)
+	if (n->type == ROFFT_ELEM || n->type == ROFFT_BLOCK)
 		mandoc_msg(MANDOCERR_MACRO_OBS, mdoc->parse,
 		    n->line, n->pos, mdoc_macronames[n->tok]);
 }
@@ -856,7 +769,7 @@ pre_dd(PRE_ARGS)
 static void
 post_bf(POST_ARGS)
 {
-	struct mdoc_node *np, *nch;
+	struct roff_node *np, *nch;
 	enum mdocargt	  arg;
 
 	/*
@@ -864,23 +777,11 @@ post_bf(POST_ARGS)
 	 * element, which contains the goods.
 	 */
 
-	if (MDOC_HEAD != mdoc->last->type) {
-		if (ENDBODY_NOT != mdoc->last->end) {
-			assert(mdoc->last->pending);
-			np = mdoc->last->pending->parent->head;
-		} else if (MDOC_BLOCK != mdoc->last->type) {
-			np = mdoc->last->parent->head;
-		} else
-			np = mdoc->last->head;
-
-		assert(np);
-		assert(MDOC_HEAD == np->type);
-		assert(MDOC_Bf == np->tok);
+	np = mdoc->last;
+	if (np->type != ROFFT_HEAD)
 		return;
-	}
 
-	np = mdoc->last;
-	assert(MDOC_BLOCK == np->parent->type);
+	assert(np->parent->type == ROFFT_BLOCK);
 	assert(MDOC_Bf == np->parent->tok);
 
 	/* Check the number of arguments. */
@@ -930,17 +831,16 @@ post_bf(POST_ARGS)
 static void
 post_lb(POST_ARGS)
 {
-	struct mdoc_node	*n;
+	struct roff_node	*n;
 	const char		*stdlibname;
 	char			*libname;
 
-	check_count(mdoc, MDOC_ELEM, CHECK_EQ, 1);
 	n = mdoc->last->child;
-	assert(MDOC_TEXT == n->type);
+	assert(n->type == ROFFT_TEXT);
 
 	if (NULL == (stdlibname = mdoc_a2lib(n->string)))
 		mandoc_asprintf(&libname,
-		    "library \\(lq%s\\(rq", n->string);
+		    "library \\(Lq%s\\(Rq", n->string);
 	else
 		libname = mandoc_strdup(stdlibname);
 
@@ -951,7 +851,7 @@ post_lb(POST_ARGS)
 static void
 post_eoln(POST_ARGS)
 {
-	const struct mdoc_node *n;
+	const struct roff_node *n;
 
 	n = mdoc->last;
 	if (n->child)
@@ -964,7 +864,7 @@ post_eoln(POST_ARGS)
 static void
 post_fname(POST_ARGS)
 {
-	const struct mdoc_node	*n;
+	const struct roff_node	*n;
 	const char		*cp;
 	size_t			 pos;
 
@@ -987,17 +887,33 @@ post_fn(POST_ARGS)
 static void
 post_fo(POST_ARGS)
 {
+	const struct roff_node	*n;
 
-	check_count(mdoc, MDOC_HEAD, CHECK_EQ, 1);
-	bwarn_ge1(mdoc);
-	if (mdoc->last->type == MDOC_HEAD && mdoc->last->nchild)
-		post_fname(mdoc);
+	n = mdoc->last;
+
+	if (n->type != ROFFT_HEAD)
+		return;
+
+	if (n->child == NULL) {
+		mandoc_msg(MANDOCERR_FO_NOHEAD, mdoc->parse,
+		    n->line, n->pos, "Fo");
+		return;
+	}
+	if (n->child != n->last) {
+		mandoc_vmsg(MANDOCERR_ARG_EXCESS, mdoc->parse,
+		    n->child->next->line, n->child->next->pos,
+		    "Fo ... %s", n->child->next->string);
+		while (n->child != n->last)
+			mdoc_node_delete(mdoc, n->last);
+	}
+
+	post_fname(mdoc);
 }
 
 static void
 post_fa(POST_ARGS)
 {
-	const struct mdoc_node *n;
+	const struct roff_node *n;
 	const char *cp;
 
 	for (n = mdoc->last->child; n != NULL; n = n->next) {
@@ -1018,7 +934,7 @@ post_fa(POST_ARGS)
 static void
 post_vt(POST_ARGS)
 {
-	const struct mdoc_node *n;
+	const struct roff_node *n;
 
 	/*
 	 * The Vt macro comes in both ELEM and BLOCK form, both of which
@@ -1028,11 +944,11 @@ post_vt(POST_ARGS)
 	 * specifically the BODY, should only have TEXT children.
 	 */
 
-	if (MDOC_BODY != mdoc->last->type)
+	if (mdoc->last->type != ROFFT_BODY)
 		return;
 
 	for (n = mdoc->last->child; n; n = n->next)
-		if (MDOC_TEXT != n->type)
+		if (n->type != ROFFT_TEXT)
 			mandoc_msg(MANDOCERR_VT_CHILD, mdoc->parse,
 			    n->line, n->pos, mdoc_macronames[n->tok]);
 }
@@ -1040,7 +956,7 @@ post_vt(POST_ARGS)
 static void
 post_nm(POST_ARGS)
 {
-	struct mdoc_node	*n;
+	struct roff_node	*n;
 
 	n = mdoc->last;
 
@@ -1062,11 +978,11 @@ post_nm(POST_ARGS)
 static void
 post_nd(POST_ARGS)
 {
-	struct mdoc_node	*n;
+	struct roff_node	*n;
 
 	n = mdoc->last;
 
-	if (n->type != MDOC_BODY)
+	if (n->type != ROFFT_BODY)
 		return;
 
 	if (n->child == NULL)
@@ -1079,34 +995,46 @@ post_nd(POST_ARGS)
 static void
 post_d1(POST_ARGS)
 {
+	struct roff_node	*n;
 
-	bwarn_ge1(mdoc);
+	n = mdoc->last;
+
+	if (n->type != ROFFT_BODY)
+		return;
+
+	if (n->child == NULL)
+		mandoc_msg(MANDOCERR_BLK_EMPTY, mdoc->parse,
+		    n->line, n->pos, "D1");
+
 	post_hyph(mdoc);
 }
 
 static void
 post_literal(POST_ARGS)
 {
+	struct roff_node	*n;
 
-	if (mdoc->last->tok == MDOC_Bd)
-		hwarn_eq0(mdoc);
-	bwarn_ge1(mdoc);
+	n = mdoc->last;
 
-	/*
-	 * The `Dl' (note "el" not "one") and `Bd' macros unset the
-	 * MDOC_LITERAL flag as they leave.  Note that `Bd' only sets
-	 * this in literal mode, but it doesn't hurt to just switch it
-	 * off in general since displays can't be nested.
-	 */
+	if (n->type != ROFFT_BODY)
+		return;
 
-	if (MDOC_BODY == mdoc->last->type)
-		mdoc->flags &= ~MDOC_LITERAL;
+	if (n->child == NULL)
+		mandoc_msg(MANDOCERR_BLK_EMPTY, mdoc->parse,
+		    n->line, n->pos, mdoc_macronames[n->tok]);
+
+	if (n->tok == MDOC_Bd &&
+	    n->norm->Bd.type != DISP_literal &&
+	    n->norm->Bd.type != DISP_unfilled)
+		return;
+
+	mdoc->flags &= ~MDOC_LITERAL;
 }
 
 static void
 post_defaults(POST_ARGS)
 {
-	struct mdoc_node *nn;
+	struct roff_node *nn;
 
 	/*
 	 * The `Ar' defaults to "file ..." if no value is provided as an
@@ -1118,7 +1046,7 @@ post_defaults(POST_ARGS)
 		return;
 
 	nn = mdoc->last;
-	mdoc->next = MDOC_NEXT_CHILD;
+	mdoc->next = ROFF_NEXT_CHILD;
 
 	switch (nn->tok) {
 	case MDOC_Ar:
@@ -1140,13 +1068,13 @@ post_defaults(POST_ARGS)
 static void
 post_at(POST_ARGS)
 {
-	struct mdoc_node	*n;
+	struct roff_node	*n;
 	const char		*std_att;
 	char			*att;
 
 	n = mdoc->last;
 	if (n->child == NULL) {
-		mdoc->next = MDOC_NEXT_CHILD;
+		mdoc->next = ROFF_NEXT_CHILD;
 		mdoc_word_alloc(mdoc, n->line, n->pos, "AT&T UNIX");
 		mdoc->last = n;
 		return;
@@ -1159,7 +1087,7 @@ post_at(POST_ARGS)
 	 */
 
 	n = n->child;
-	assert(MDOC_TEXT == n->type);
+	assert(n->type == ROFFT_TEXT);
 	if (NULL == (std_att = mdoc_a2att(n->string))) {
 		mandoc_vmsg(MANDOCERR_AT_BAD, mdoc->parse,
 		    n->line, n->pos, "At %s", n->string);
@@ -1174,21 +1102,24 @@ post_at(POST_ARGS)
 static void
 post_an(POST_ARGS)
 {
-	struct mdoc_node *np;
+	struct roff_node *np, *nch;
 
 	np = mdoc->last;
-	if (AUTH__NONE == np->norm->An.auth) {
-		if (0 == np->child)
-			check_count(mdoc, MDOC_ELEM, CHECK_GT, 0);
-	} else if (np->child)
-		check_count(mdoc, MDOC_ELEM, CHECK_EQ, 0);
+	nch = np->child;
+	if (np->norm->An.auth == AUTH__NONE) {
+		if (nch == NULL)
+			mandoc_msg(MANDOCERR_MACRO_EMPTY, mdoc->parse,
+			    np->line, np->pos, "An");
+	} else if (nch != NULL)
+		mandoc_vmsg(MANDOCERR_ARG_EXCESS, mdoc->parse,
+		    nch->line, nch->pos, "An ... %s", nch->string);
 }
 
 static void
 post_en(POST_ARGS)
 {
 
-	if (MDOC_BLOCK == mdoc->last->type)
+	if (mdoc->last->type == ROFFT_BLOCK)
 		mdoc->last->norm->Es = mdoc->last_es;
 }
 
@@ -1202,12 +1133,12 @@ post_es(POST_ARGS)
 static void
 post_it(POST_ARGS)
 {
+	struct roff_node *nbl, *nit, *nch;
 	int		  i, cols;
 	enum mdoc_list	  lt;
-	struct mdoc_node *nbl, *nit, *nch;
 
 	nit = mdoc->last;
-	if (nit->type != MDOC_BLOCK)
+	if (nit->type != ROFFT_BLOCK)
 		return;
 
 	nbl = nit->parent->parent;
@@ -1254,13 +1185,13 @@ post_it(POST_ARGS)
 		assert(nit->head->child == NULL);
 
 		for (i = 0, nch = nit->child; nch; nch = nch->next)
-			if (nch->type == MDOC_BODY)
+			if (nch->type == ROFFT_BODY)
 				i++;
 
 		if (i < cols || i > cols + 1)
-			mandoc_vmsg(MANDOCERR_ARGCOUNT,
+			mandoc_vmsg(MANDOCERR_BL_COL,
 			    mdoc->parse, nit->line, nit->pos,
-			    "columns == %d (have %d)", cols, i);
+			    "%d columns, %d cells", cols, i);
 		break;
 	default:
 		abort();
@@ -1270,7 +1201,7 @@ post_it(POST_ARGS)
 static void
 post_bl_block(POST_ARGS)
 {
-	struct mdoc_node *n, *ni, *nc;
+	struct roff_node *n, *ni, *nc;
 
 	/*
 	 * These are fairly complicated, so we've broken them into two
@@ -1331,7 +1262,7 @@ void
 rewrite_macro2len(char **arg)
 {
 	size_t		  width;
-	enum mdoct	  tok;
+	int		  tok;
 
 	if (*arg == NULL)
 		return;
@@ -1349,7 +1280,7 @@ rewrite_macro2len(char **arg)
 static void
 post_bl_block_tag(POST_ARGS)
 {
-	struct mdoc_node *n, *nn;
+	struct roff_node *n, *nn;
 	size_t		  sz, ssz;
 	int		  i;
 	char		  buf[24];
@@ -1368,13 +1299,13 @@ post_bl_block_tag(POST_ARGS)
 		if (MDOC_It != nn->tok)
 			continue;
 
-		assert(MDOC_BLOCK == nn->type);
+		assert(nn->type == ROFFT_BLOCK);
 		nn = nn->head->child;
 
 		if (nn == NULL)
 			break;
 
-		if (MDOC_TEXT == nn->type) {
+		if (nn->type == ROFFT_TEXT) {
 			sz = strlen(nn->string) + 1;
 			break;
 		}
@@ -1414,13 +1345,21 @@ post_bl_block_tag(POST_ARGS)
 static void
 post_bl_head(POST_ARGS)
 {
-	struct mdoc_node *np, *nn, *nnp;
+	struct roff_node *nbl, *nh, *nch, *nnext;
 	struct mdoc_argv *argv;
 	int		  i, j;
 
-	if (LIST_column != mdoc->last->norm->Bl.type) {
-		/* FIXME: this should be ERROR class... */
-		hwarn_eq0(mdoc);
+	nh = mdoc->last;
+
+	if (nh->norm->Bl.type != LIST_column) {
+		if ((nch = nh->child) == NULL)
+			return;
+		mandoc_vmsg(MANDOCERR_ARG_EXCESS, mdoc->parse,
+		    nch->line, nch->pos, "Bl ... %s", nch->string);
+		while (nch != NULL) {
+			mdoc_node_delete(mdoc, nch);
+			nch = nh->child;
+		}
 		return;
 	}
 
@@ -1430,17 +1369,15 @@ post_bl_head(POST_ARGS)
 	 * lists where they're argument values following -column.
 	 */
 
-	if (mdoc->last->child == NULL)
+	if (nh->child == NULL)
 		return;
 
-	np = mdoc->last->parent;
-	assert(np->args);
-
-	for (j = 0; j < (int)np->args->argc; j++)
-		if (MDOC_Column == np->args->argv[j].arg)
+	nbl = nh->parent;
+	for (j = 0; j < (int)nbl->args->argc; j++)
+		if (nbl->args->argv[j].arg == MDOC_Column)
 			break;
 
-	assert(j < (int)np->args->argc);
+	assert(j < (int)nbl->args->argc);
 
 	/*
 	 * Accommodate for new-style groff column syntax.  Shuffle the
@@ -1448,52 +1385,53 @@ post_bl_head(POST_ARGS)
 	 * column field.  Then, delete the head children.
 	 */
 
-	argv = np->args->argv + j;
+	argv = nbl->args->argv + j;
 	i = argv->sz;
-	argv->sz += mdoc->last->nchild;
+	argv->sz += nh->nchild;
 	argv->value = mandoc_reallocarray(argv->value,
 	    argv->sz, sizeof(char *));
 
-	mdoc->last->norm->Bl.ncols = argv->sz;
-	mdoc->last->norm->Bl.cols = (void *)argv->value;
+	nh->norm->Bl.ncols = argv->sz;
+	nh->norm->Bl.cols = (void *)argv->value;
 
-	for (nn = mdoc->last->child; nn; i++) {
-		argv->value[i] = nn->string;
-		nn->string = NULL;
-		nnp = nn;
-		nn = nn->next;
-		mdoc_node_delete(NULL, nnp);
+	for (nch = nh->child; nch != NULL; nch = nnext) {
+		argv->value[i++] = nch->string;
+		nch->string = NULL;
+		nnext = nch->next;
+		mdoc_node_delete(NULL, nch);
 	}
-
-	mdoc->last->nchild = 0;
-	mdoc->last->child = NULL;
+	nh->nchild = 0;
+	nh->child = NULL;
 }
 
 static void
 post_bl(POST_ARGS)
 {
-	struct mdoc_node	*nparent, *nprev; /* of the Bl block */
-	struct mdoc_node	*nblock, *nbody;  /* of the Bl */
-	struct mdoc_node	*nchild, *nnext;  /* of the Bl body */
+	struct roff_node	*nparent, *nprev; /* of the Bl block */
+	struct roff_node	*nblock, *nbody;  /* of the Bl */
+	struct roff_node	*nchild, *nnext;  /* of the Bl body */
 
 	nbody = mdoc->last;
 	switch (nbody->type) {
-	case MDOC_BLOCK:
+	case ROFFT_BLOCK:
 		post_bl_block(mdoc);
 		return;
-	case MDOC_HEAD:
+	case ROFFT_HEAD:
 		post_bl_head(mdoc);
 		return;
-	case MDOC_BODY:
+	case ROFFT_BODY:
 		break;
 	default:
 		return;
 	}
 
-	bwarn_ge1(mdoc);
-
 	nchild = nbody->child;
-	while (NULL != nchild) {
+	if (nchild == NULL) {
+		mandoc_msg(MANDOCERR_BLK_EMPTY, mdoc->parse,
+		    nbody->line, nbody->pos, "Bl");
+		return;
+	}
+	while (nchild != NULL) {
 		if (nchild->tok == MDOC_It ||
 		    (nchild->tok == MDOC_Sm &&
 		     nchild->next != NULL &&
@@ -1552,15 +1490,21 @@ post_bl(POST_ARGS)
 static void
 post_bk(POST_ARGS)
 {
+	struct roff_node	*n;
 
-	hwarn_eq0(mdoc);
-	bwarn_ge1(mdoc);
+	n = mdoc->last;
+
+	if (n->type == ROFFT_BLOCK && n->body->child == NULL) {
+		mandoc_msg(MANDOCERR_BLK_EMPTY,
+		    mdoc->parse, n->line, n->pos, "Bk");
+		mdoc_node_delete(mdoc, n);
+	}
 }
 
 static void
-post_sm(struct mdoc *mdoc)
+post_sm(struct roff_man *mdoc)
 {
-	struct mdoc_node	*nch;
+	struct roff_node	*nch;
 
 	nch = mdoc->last->child;
 
@@ -1569,7 +1513,7 @@ post_sm(struct mdoc *mdoc)
 		return;
 	}
 
-	assert(nch->type == MDOC_TEXT);
+	assert(nch->type == ROFFT_TEXT);
 
 	if ( ! strcmp(nch->string, "on")) {
 		mdoc->flags &= ~MDOC_SMOFF;
@@ -1590,7 +1534,7 @@ post_sm(struct mdoc *mdoc)
 static void
 post_root(POST_ARGS)
 {
-	struct mdoc_node *n;
+	struct roff_node *n;
 
 	/* Add missing prologue data. */
 
@@ -1630,21 +1574,14 @@ post_root(POST_ARGS)
 static void
 post_st(POST_ARGS)
 {
-	struct mdoc_node	 *n, *nch;
+	struct roff_node	 *n, *nch;
 	const char		 *p;
 
 	n = mdoc->last;
 	nch = n->child;
 
-	if (NULL == nch) {
-		mandoc_msg(MANDOCERR_MACRO_EMPTY, mdoc->parse,
-		    n->line, n->pos, mdoc_macronames[n->tok]);
-		mdoc_node_delete(mdoc, n);
-		return;
-	}
+	assert(nch->type == ROFFT_TEXT);
 
-	assert(MDOC_TEXT == nch->type);
-
 	if (NULL == (p = mdoc_a2st(nch->string))) {
 		mandoc_vmsg(MANDOCERR_ST_BAD, mdoc->parse,
 		    nch->line, nch->pos, "St %s", nch->string);
@@ -1658,20 +1595,18 @@ post_st(POST_ARGS)
 static void
 post_rs(POST_ARGS)
 {
-	struct mdoc_node *nn, *next, *prev;
+	struct roff_node *np, *nch, *next, *prev;
 	int		  i, j;
 
-	switch (mdoc->last->type) {
-	case MDOC_HEAD:
-		check_count(mdoc, MDOC_HEAD, CHECK_EQ, 0);
+	np = mdoc->last;
+
+	if (np->type != ROFFT_BODY)
 		return;
-	case MDOC_BODY:
-		if (mdoc->last->child)
-			break;
-		check_count(mdoc, MDOC_BODY, CHECK_GT, 0);
+
+	if (np->child == NULL) {
+		mandoc_msg(MANDOCERR_RS_EMPTY, mdoc->parse,
+		    np->line, np->pos, "Rs");
 		return;
-	default:
-		return;
 	}
 
 	/*
@@ -1681,38 +1616,38 @@ post_rs(POST_ARGS)
 	 */
 
 	next = NULL;
-	for (nn = mdoc->last->child->next; nn; nn = next) {
-		/* Determine order of `nn'. */
+	for (nch = np->child->next; nch != NULL; nch = next) {
+		/* Determine order number of this child. */
 		for (i = 0; i < RSORD_MAX; i++)
-			if (rsord[i] == nn->tok)
+			if (rsord[i] == nch->tok)
 				break;
 
 		if (i == RSORD_MAX) {
 			mandoc_msg(MANDOCERR_RS_BAD,
-			    mdoc->parse, nn->line, nn->pos,
-			    mdoc_macronames[nn->tok]);
+			    mdoc->parse, nch->line, nch->pos,
+			    mdoc_macronames[nch->tok]);
 			i = -1;
-		} else if (MDOC__J == nn->tok || MDOC__B == nn->tok)
-			mdoc->last->norm->Rs.quote_T++;
+		} else if (nch->tok == MDOC__J || nch->tok == MDOC__B)
+			np->norm->Rs.quote_T++;
 
 		/*
-		 * Remove `nn' from the chain.  This somewhat
+		 * Remove this child from the chain.  This somewhat
 		 * repeats mdoc_node_unlink(), but since we're
 		 * just re-ordering, there's no need for the
 		 * full unlink process.
 		 */
 
-		if (NULL != (next = nn->next))
-			next->prev = nn->prev;
+		if ((next = nch->next) != NULL)
+			next->prev = nch->prev;
 
-		if (NULL != (prev = nn->prev))
-			prev->next = nn->next;
+		if ((prev = nch->prev) != NULL)
+			prev->next = nch->next;
 
-		nn->prev = nn->next = NULL;
+		nch->prev = nch->next = NULL;
 
 		/*
 		 * Scan back until we reach a node that's
-		 * ordered before `nn'.
+		 * to be ordered before this child.
 		 */
 
 		for ( ; prev ; prev = prev->prev) {
@@ -1728,21 +1663,21 @@ post_rs(POST_ARGS)
 		}
 
 		/*
-		 * Set `nn' back into its correct place in front
-		 * of the `prev' node.
+		 * Set this child back into its correct place
+		 * in front of the `prev' node.
 		 */
 
-		nn->prev = prev;
+		nch->prev = prev;
 
-		if (prev) {
-			if (prev->next)
-				prev->next->prev = nn;
-			nn->next = prev->next;
-			prev->next = nn;
+		if (prev == NULL) {
+			np->child->prev = nch;
+			nch->next = np->child;
+			np->child = nch;
 		} else {
-			mdoc->last->child->prev = nn;
-			nn->next = mdoc->last->child;
-			mdoc->last->child = nn;
+			if (prev->next)
+				prev->next->prev = nch;
+			nch->next = prev->next;
+			prev->next = nch;
 		}
 	}
 }
@@ -1754,33 +1689,17 @@ post_rs(POST_ARGS)
 static void
 post_hyph(POST_ARGS)
 {
-	struct mdoc_node	*n, *nch;
+	struct roff_node	*nch;
 	char			*cp;
 
-	n = mdoc->last;
-	switch (n->type) {
-	case MDOC_HEAD:
-		if (MDOC_Sh == n->tok || MDOC_Ss == n->tok)
-			break;
-		return;
-	case MDOC_BODY:
-		if (MDOC_D1 == n->tok || MDOC_Nd == n->tok)
-			break;
-		return;
-	case MDOC_ELEM:
-		break;
-	default:
-		return;
-	}
-
-	for (nch = n->child; nch; nch = nch->next) {
-		if (MDOC_TEXT != nch->type)
+	for (nch = mdoc->last->child; nch != NULL; nch = nch->next) {
+		if (nch->type != ROFFT_TEXT)
 			continue;
 		cp = nch->string;
-		if ('\0' == *cp)
+		if (*cp == '\0')
 			continue;
-		while ('\0' != *(++cp))
-			if ('-' == *cp &&
+		while (*(++cp) != '\0')
+			if (*cp == '-' &&
 			    isalpha((unsigned char)cp[-1]) &&
 			    isalpha((unsigned char)cp[1]))
 				*cp = ASCII_HYPH;
@@ -1788,14 +1707,6 @@ post_hyph(POST_ARGS)
 }
 
 static void
-post_hyphtext(POST_ARGS)
-{
-
-	ewarn_ge1(mdoc);
-	post_hyph(mdoc);
-}
-
-static void
 post_ns(POST_ARGS)
 {
 
@@ -1811,10 +1722,10 @@ post_sh(POST_ARGS)
 	post_ignpar(mdoc);
 
 	switch (mdoc->last->type) {
-	case MDOC_HEAD:
+	case ROFFT_HEAD:
 		post_sh_head(mdoc);
 		break;
-	case MDOC_BODY:
+	case ROFFT_BODY:
 		switch (mdoc->lastsec)  {
 		case SEC_NAME:
 			post_sh_name(mdoc);
@@ -1837,42 +1748,46 @@ post_sh(POST_ARGS)
 static void
 post_sh_name(POST_ARGS)
 {
-	struct mdoc_node *n;
+	struct roff_node *n;
+	int hasnm, hasnd;
 
-	/*
-	 * Warn if the NAME section doesn't contain the `Nm' and `Nd'
-	 * macros (can have multiple `Nm' and one `Nd').  Note that the
-	 * children of the BODY declaration can also be "text".
-	 */
+	hasnm = hasnd = 0;
 
-	if (NULL == (n = mdoc->last->child)) {
-		mandoc_msg(MANDOCERR_NAMESEC_BAD, mdoc->parse,
-		    mdoc->last->line, mdoc->last->pos, "empty");
-		return;
+	for (n = mdoc->last->child; n != NULL; n = n->next) {
+		switch (n->tok) {
+		case MDOC_Nm:
+			hasnm = 1;
+			break;
+		case MDOC_Nd:
+			hasnd = 1;
+			if (n->next != NULL)
+				mandoc_msg(MANDOCERR_NAMESEC_ND,
+				    mdoc->parse, n->line, n->pos, NULL);
+			break;
+		case MDOC_MAX:
+			if (hasnm)
+				break;
+			/* FALLTHROUGH */
+		default:
+			mandoc_msg(MANDOCERR_NAMESEC_BAD, mdoc->parse,
+			    n->line, n->pos, mdoc_macronames[n->tok]);
+			break;
+		}
 	}
 
-	for ( ; n && n->next; n = n->next) {
-		if (MDOC_ELEM == n->type && MDOC_Nm == n->tok)
-			continue;
-		if (MDOC_TEXT == n->type)
-			continue;
-		mandoc_msg(MANDOCERR_NAMESEC_BAD, mdoc->parse,
-		    n->line, n->pos, mdoc_macronames[n->tok]);
-	}
-
-	assert(n);
-	if (MDOC_BLOCK == n->type && MDOC_Nd == n->tok)
-		return;
-
-	mandoc_msg(MANDOCERR_NAMESEC_BAD, mdoc->parse,
-	    n->line, n->pos, mdoc_macronames[n->tok]);
+	if ( ! hasnm)
+		mandoc_msg(MANDOCERR_NAMESEC_NONM, mdoc->parse,
+		    mdoc->last->line, mdoc->last->pos, NULL);
+	if ( ! hasnd)
+		mandoc_msg(MANDOCERR_NAMESEC_NOND, mdoc->parse,
+		    mdoc->last->line, mdoc->last->pos, NULL);
 }
 
 static void
 post_sh_see_also(POST_ARGS)
 {
-	const struct mdoc_node	*n;
-	const char 		*name, *sec;
+	const struct roff_node	*n;
+	const char		*name, *sec;
 	const char		*lastname, *lastsec, *lastpunct;
 	int			 cmp;
 
@@ -1916,7 +1831,7 @@ post_sh_see_also(POST_ARGS)
 			lastpunct = "none";
 			continue;
 		}
-		if (n->type != MDOC_TEXT)
+		if (n->type != ROFFT_TEXT)
 			break;
 		for (name = n->string; *name != '\0'; name++)
 			if (isalpha((const unsigned char)*name))
@@ -1931,7 +1846,7 @@ post_sh_see_also(POST_ARGS)
 }
 
 static int
-child_an(const struct mdoc_node *n)
+child_an(const struct roff_node *n)
 {
 
 	for (n = n->child; n != NULL; n = n->next)
@@ -1952,10 +1867,10 @@ post_sh_authors(POST_ARGS)
 static void
 post_sh_head(POST_ARGS)
 {
-	struct mdoc_node *n;
+	struct roff_node *n;
 	const char	*goodsec;
 	char		*secname;
-	enum mdoc_sec	 sec;
+	enum roff_sec	 sec;
 
 	/*
 	 * Process a new section.  Sections are either "named" or
@@ -2072,13 +1987,17 @@ post_sh_head(POST_ARGS)
 static void
 post_ignpar(POST_ARGS)
 {
-	struct mdoc_node *np;
+	struct roff_node *np;
 
-	check_count(mdoc, MDOC_HEAD, CHECK_GT, 0);
-	post_hyph(mdoc);
-
-	if (MDOC_BODY != mdoc->last->type)
+	switch (mdoc->last->type) {
+	case ROFFT_HEAD:
+		post_hyph(mdoc);
 		return;
+	case ROFFT_BODY:
+		break;
+	default:
+		return;
+	}
 
 	if (NULL != (np = mdoc->last->child))
 		if (MDOC_Pp == np->tok || MDOC_Lp == np->tok) {
@@ -2105,7 +2024,7 @@ pre_par(PRE_ARGS)
 
 	if (NULL == mdoc->last)
 		return;
-	if (MDOC_ELEM != n->type && MDOC_BLOCK != n->type)
+	if (n->type != ROFFT_ELEM && n->type != ROFFT_BLOCK)
 		return;
 
 	/*
@@ -2134,16 +2053,19 @@ pre_par(PRE_ARGS)
 static void
 post_par(POST_ARGS)
 {
-	struct mdoc_node *np;
+	struct roff_node *np;
 
-	if (mdoc->last->tok == MDOC_sp)
-		check_count(mdoc, MDOC_ELEM, CHECK_LT, 2);
-	else
-		check_count(mdoc, MDOC_ELEM, CHECK_EQ, 0);
+	np = mdoc->last;
 
-	if (MDOC_ELEM != mdoc->last->type &&
-	    MDOC_BLOCK != mdoc->last->type)
-		return;
+	if (np->tok == MDOC_sp) {
+		if (np->nchild > 1)
+			mandoc_vmsg(MANDOCERR_ARG_EXCESS, mdoc->parse,
+			    np->child->next->line, np->child->next->pos,
+			    "sp ... %s", np->child->next->string);
+	} else if (np->child != NULL)
+		mandoc_vmsg(MANDOCERR_ARG_SKIP,
+		    mdoc->parse, np->line, np->pos, "%s %s",
+		    mdoc_macronames[np->tok], np->child->string);
 
 	if (NULL == (np = mdoc->last->prev)) {
 		np = mdoc->last->parent;
@@ -2167,7 +2089,7 @@ pre_literal(PRE_ARGS)
 
 	pre_display(mdoc, n);
 
-	if (MDOC_BODY != n->type)
+	if (n->type != ROFFT_BODY)
 		return;
 
 	/*
@@ -2194,7 +2116,7 @@ pre_literal(PRE_ARGS)
 static void
 post_dd(POST_ARGS)
 {
-	struct mdoc_node *n;
+	struct roff_node *n;
 	char		 *datestr;
 
 	if (mdoc->meta.date)
@@ -2223,7 +2145,7 @@ out:
 static void
 post_dt(POST_ARGS)
 {
-	struct mdoc_node *nn, *n;
+	struct roff_node *nn, *n;
 	const char	 *cp;
 	char		 *p;
 
@@ -2239,70 +2161,68 @@ post_dt(POST_ARGS)
 	mdoc->meta.vol = NULL;
 	mdoc->meta.arch = NULL;
 
-	/* First check that all characters are uppercase. */
+	/* Mandatory first argument: title. */
 
-	if (NULL != (nn = n->child))
-		for (p = nn->string; *p; p++) {
-			if (toupper((unsigned char)*p) == *p)
-				continue;
-			mandoc_vmsg(MANDOCERR_TITLE_CASE,
-			    mdoc->parse, nn->line,
-			    nn->pos + (p - nn->string),
-			    "Dt %s", nn->string);
-			break;
-		}
-
-	/* No argument: msec and arch remain NULL. */
-
-	if (NULL == (nn = n->child)) {
+	nn = n->child;
+	if (nn == NULL || *nn->string == '\0') {
 		mandoc_msg(MANDOCERR_DT_NOTITLE,
 		    mdoc->parse, n->line, n->pos, "Dt");
 		mdoc->meta.title = mandoc_strdup("UNTITLED");
-		mdoc->meta.vol = mandoc_strdup("LOCAL");
-		goto out;
+	} else {
+		mdoc->meta.title = mandoc_strdup(nn->string);
+
+		/* Check that all characters are uppercase. */
+
+		for (p = nn->string; *p != '\0'; p++)
+			if (islower((unsigned char)*p)) {
+				mandoc_vmsg(MANDOCERR_TITLE_CASE,
+				    mdoc->parse, nn->line,
+				    nn->pos + (p - nn->string),
+				    "Dt %s", nn->string);
+				break;
+			}
 	}
 
-	/* One argument: msec and arch remain NULL. */
+	/* Mandatory second argument: section. */
 
-	mdoc->meta.title = mandoc_strdup(
-	    '\0' == nn->string[0] ? "UNTITLED" : nn->string);
+	if (nn != NULL)
+		nn = nn->next;
 
-	if (NULL == (nn = nn->next)) {
+	if (nn == NULL) {
 		mandoc_vmsg(MANDOCERR_MSEC_MISSING,
 		    mdoc->parse, n->line, n->pos,
 		    "Dt %s", mdoc->meta.title);
 		mdoc->meta.vol = mandoc_strdup("LOCAL");
-		goto out;
+		goto out;  /* msec and arch remain NULL. */
 	}
 
-	/* Handles: `.Dt TITLE SEC'
-	 * title = TITLE,
-	 * volume = SEC is msec ? format(msec) : SEC,
-	 * msec = SEC is msec ? atoi(msec) : 0,
-	 * arch = NULL
-	 */
+	mdoc->meta.msec = mandoc_strdup(nn->string);
 
+	/* Infer volume title from section number. */
+
 	cp = mandoc_a2msec(nn->string);
-	if (cp) {
-		mdoc->meta.vol = mandoc_strdup(cp);
-		mdoc->meta.msec = mandoc_strdup(nn->string);
-	} else {
+	if (cp == NULL) {
 		mandoc_vmsg(MANDOCERR_MSEC_BAD, mdoc->parse,
 		    nn->line, nn->pos, "Dt ... %s", nn->string);
 		mdoc->meta.vol = mandoc_strdup(nn->string);
-		mdoc->meta.msec = mandoc_strdup(nn->string);
-	}
+	} else
+		mdoc->meta.vol = mandoc_strdup(cp);
 
-	/* Handle an optional architecture */
+	/* Optional third argument: architecture. */
 
-	if ((nn = nn->next) != NULL) {
-		for (p = nn->string; *p; p++)
-			*p = tolower((unsigned char)*p);
-		mdoc->meta.arch = mandoc_strdup(nn->string);
-	}
+	if ((nn = nn->next) == NULL)
+		goto out;
 
-	/* Ignore any subsequent parameters... */
-	/* FIXME: warn about subsequent parameters. */
+	for (p = nn->string; *p != '\0'; p++)
+		*p = tolower((unsigned char)*p);
+	mdoc->meta.arch = mandoc_strdup(nn->string);
+
+	/* Ignore fourth and later arguments. */
+
+	if ((nn = nn->next) != NULL)
+		mandoc_vmsg(MANDOCERR_ARG_EXCESS, mdoc->parse,
+		    nn->line, nn->pos, "Dt ... %s", nn->string);
+
 out:
 	mdoc_node_delete(mdoc, n);
 }
@@ -2310,7 +2230,7 @@ out:
 static void
 post_bx(POST_ARGS)
 {
-	struct mdoc_node	*n;
+	struct roff_node	*n;
 
 	/*
 	 * Make `Bx's second argument always start with an uppercase
@@ -2330,7 +2250,7 @@ post_os(POST_ARGS)
 	struct utsname	  utsname;
 	static char	 *defbuf;
 #endif
-	struct mdoc_node *n;
+	struct roff_node *n;
 
 	n = mdoc->last;
 
@@ -2380,7 +2300,7 @@ out:
 static void
 post_ex(POST_ARGS)
 {
-	struct mdoc_node *n;
+	struct roff_node *n;
 
 	n = mdoc->last;
 
@@ -2393,25 +2313,25 @@ post_ex(POST_ARGS)
 		return;
 	}
 
-	mdoc->next = MDOC_NEXT_CHILD;
+	mdoc->next = ROFF_NEXT_CHILD;
 	mdoc_word_alloc(mdoc, n->line, n->pos, mdoc->meta.name);
 	mdoc->last = n;
 }
 
-static enum mdoc_sec
+static enum roff_sec
 a2sec(const char *p)
 {
 	int		 i;
 
 	for (i = 0; i < (int)SEC__MAX; i++)
 		if (secnames[i] && 0 == strcmp(p, secnames[i]))
-			return((enum mdoc_sec)i);
+			return((enum roff_sec)i);
 
 	return(SEC_CUSTOM);
 }
 
 static size_t
-macro2len(enum mdoct macro)
+macro2len(int macro)
 {
 
 	switch (macro) {