*** empty log message ***

7 files changed, 333 insertions, 138 deletions

diff --git a/macro.c b/macro.c
index 55c6f89d..761d6e53 100644
--- a/macro.c
+++ b/macro.c
@@ -1,4 +1,4 @@
-/* $Id: macro.c,v 1.34 2009/01/12 17:26:42 kristaps Exp $ */
+/* $Id: macro.c,v 1.35 2009/01/14 11:58:24 kristaps Exp $ */
 /*
  * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
  *
@@ -29,6 +29,16 @@
 
 /* FIXME: maxlineargs should be per LINE, no per TOKEN. */
 
+static	int	  rewind_alt(int);
+static	int	  rewind_dohalt(int, enum mdoc_type, 
+			const struct mdoc_node *);
+#define	REWIND_REWIND	(1 << 0)
+#define	REWIND_NOHALT	(1 << 1)
+#define	REWIND_HALT	(1 << 2)
+static	int	  rewind_dobreak(int, enum mdoc_type, 
+			const struct mdoc_node *);
+
+
 static	int	  rewind_elem(struct mdoc *, int);
 static	int	  rewind_impblock(struct mdoc *, int);
 static	int	  rewind_expblock(struct mdoc *, int);
@@ -68,7 +78,8 @@ rewind_last(struct mdoc *mdoc, struct mdoc_node *to)
 			return(0);
 		if ( ! mdoc_action_post(mdoc))
 			return(0);
-		mdoc_msg(mdoc, "rewound to %s", 
+		mdoc_msg(mdoc, "rewound to %s %s", 
+				mdoc_type2a(mdoc->last->type),
 				mdoc_macronames[mdoc->last->tok]);
 		return(1);
 	}
@@ -80,7 +91,8 @@ rewind_last(struct mdoc *mdoc, struct mdoc_node *to)
 			return(0);
 		if ( ! mdoc_action_post(mdoc))
 			return(0);
-		mdoc_msg(mdoc, "rewound to %s",
+		mdoc_msg(mdoc, "rewound to %s %s",
+				mdoc_type2a(mdoc->last->type),
 				mdoc_macronames[mdoc->last->tok]);
 	} while (mdoc->last != to);
 
@@ -89,6 +101,208 @@ rewind_last(struct mdoc *mdoc, struct mdoc_node *to)
 
 
 static int
+rewind_alt(int tok)
+{
+	switch (tok) {
+	case (MDOC_Ac):
+		return(MDOC_Ao);
+	case (MDOC_Bc):
+		return(MDOC_Bo);
+	case (MDOC_Dc):
+		return(MDOC_Do);
+	case (MDOC_Ec):
+		return(MDOC_Eo);
+	case (MDOC_Ed):
+		return(MDOC_Bd);
+	case (MDOC_Ef):
+		return(MDOC_Bf);
+	case (MDOC_Ek):
+		return(MDOC_Bk);
+	case (MDOC_El):
+		return(MDOC_Bl);
+	case (MDOC_Fc):
+		return(MDOC_Fo);
+	case (MDOC_Oc):
+		return(MDOC_Oo);
+	case (MDOC_Pc):
+		return(MDOC_Po);
+	case (MDOC_Qc):
+		return(MDOC_Qo);
+	case (MDOC_Re):
+		return(MDOC_Rs);
+	case (MDOC_Sc):
+		return(MDOC_So);
+	case (MDOC_Xc):
+		return(MDOC_Xo);
+	default:
+		break;
+	}
+	abort();
+	/* NOTREACHED */
+}
+
+
+static int
+rewind_dohalt(int tok, enum mdoc_type type, const struct mdoc_node *p)
+{
+
+	if (MDOC_ROOT == p->type)
+		return(REWIND_HALT);
+	if (MDOC_TEXT == p->type) 
+		return(REWIND_NOHALT);
+	if (MDOC_ELEM == p->type) 
+		return(REWIND_NOHALT);
+
+	switch (tok) {
+	/* One-liner implicit-scope. */
+	case (MDOC_Aq):
+		/* FALLTHROUGH */
+	case (MDOC_Bq):
+		/* FALLTHROUGH */
+	case (MDOC_D1):
+		/* FALLTHROUGH */
+	case (MDOC_Dl):
+		/* FALLTHROUGH */
+	case (MDOC_Dq):
+		/* FALLTHROUGH */
+	case (MDOC_Op):
+		/* FALLTHROUGH */
+	case (MDOC_Pq):
+		/* FALLTHROUGH */
+	case (MDOC_Ql):
+		/* FALLTHROUGH */
+	case (MDOC_Qq):
+		/* FALLTHROUGH */
+	case (MDOC_Sq):
+		assert(MDOC_BODY != type);
+		assert(MDOC_TAIL != type);
+		if (type == p->type && tok == p->tok)
+			return(REWIND_REWIND);
+		break;
+
+	/* Multi-line implicit-scope. */
+	case (MDOC_It):
+		assert(MDOC_TAIL != type);
+		if (type == p->type && tok == p->tok)
+			return(REWIND_REWIND);
+		if (MDOC_BLOCK == type && MDOC_BODY == p->type && 
+				MDOC_Bl == p->tok)
+			return(REWIND_HALT);
+		break;
+	case (MDOC_Sh):
+		/* FALLTHROUGH */
+	case (MDOC_Ss):
+		if (type == p->type && tok == p->tok)
+			return(REWIND_REWIND);
+		break;
+	
+	/* Multi-line explicit scope start. */
+	case (MDOC_Ao):
+		/* FALLTHROUGH */
+	case (MDOC_Bd):
+		/* FALLTHROUGH */
+	case (MDOC_Bf):
+		/* FALLTHROUGH */
+	case (MDOC_Bk):
+		/* FALLTHROUGH */
+	case (MDOC_Bl):
+		/* FALLTHROUGH */
+	case (MDOC_Bo):
+		/* FALLTHROUGH */
+	case (MDOC_Do):
+		/* FALLTHROUGH */
+	case (MDOC_Eo):
+		/* FALLTHROUGH */
+	case (MDOC_Fo):
+		/* FALLTHROUGH */
+	case (MDOC_Oo):
+		/* FALLTHROUGH */
+	case (MDOC_Po):
+		/* FALLTHROUGH */
+	case (MDOC_Qo):
+		/* FALLTHROUGH */
+	case (MDOC_Rs):
+		/* FALLTHROUGH */
+	case (MDOC_So):
+		/* FALLTHROUGH */
+	case (MDOC_Xo):
+		if (type == p->type && tok == p->tok)
+			return(REWIND_REWIND);
+		break;
+
+	/* Multi-line explicit scope close. */
+	case (MDOC_Ac):
+		/* FALLTHROUGH */
+	case (MDOC_Bc):
+		/* FALLTHROUGH */
+	case (MDOC_Dc):
+		/* FALLTHROUGH */
+	case (MDOC_Ec):
+		/* FALLTHROUGH */
+	case (MDOC_Ed):
+		/* FALLTHROUGH */
+	case (MDOC_Ek):
+		/* FALLTHROUGH */
+	case (MDOC_El):
+		/* FALLTHROUGH */
+	case (MDOC_Fc):
+		/* FALLTHROUGH */
+	case (MDOC_Ef):
+		/* FALLTHROUGH */
+	case (MDOC_Oc):
+		/* FALLTHROUGH */
+	case (MDOC_Pc):
+		/* FALLTHROUGH */
+	case (MDOC_Qc):
+		/* FALLTHROUGH */
+	case (MDOC_Re):
+		/* FALLTHROUGH */
+	case (MDOC_Sc):
+		/* FALLTHROUGH */
+	case (MDOC_Xc):
+		if (type == p->type && rewind_alt(tok) == p->tok)
+			return(REWIND_REWIND);
+		break;
+	default:
+		abort();
+		/* NOTREACHED */
+	}
+
+	return(REWIND_NOHALT);
+}
+
+
+static int
+rewind_dobreak(int tok, enum mdoc_type type, const struct mdoc_node *p)
+{
+
+	assert(MDOC_ROOT != p->type);
+	if (MDOC_ELEM == p->type)
+		return(1);
+	if (MDOC_TEXT == p->type)
+		return(1);
+
+	switch (tok) {
+	case (MDOC_It):
+		return(MDOC_It == p->tok);
+	case (MDOC_Ss):
+		return(MDOC_Ss == p->tok);
+	case (MDOC_Sh):
+		if (MDOC_Ss == p->tok)
+			return(1);
+		return(MDOC_Sh == p->tok);
+	}
+
+	if (MDOC_EXPLICIT & mdoc_macros[tok].flags) 
+		return(p->tok == rewind_alt(tok));
+	else if (MDOC_BLOCK == p->type)
+		return(1);
+
+	return(tok == p->tok);
+}
+
+
+static int
 rewind_elem(struct mdoc *mdoc, int tok)
 {
 	struct mdoc_node *n;
@@ -107,16 +321,16 @@ static int
 rewind_body(struct mdoc *mdoc, int tok)
 {
 	struct mdoc_node *n;
-	int		  t;
-
-	assert(mdoc->last);
+	int		  c;
 
 	/* LINTED */
 	for (n = mdoc->last; n; n = n->parent) {
-		t = n->tok;
-		if (MDOC_BODY == n->type && tok == t)
+		c = rewind_dohalt(tok, MDOC_BODY, n);
+		if (REWIND_HALT == c)
+			return(1);
+		if (REWIND_REWIND == c)
 			break;
-		if (MDOC_NESTED & mdoc_macros[t].flags)
+		else if (rewind_dobreak(tok, MDOC_BODY, n))
 			continue;
 		return(mdoc_verr(mdoc, n, ERR_SCOPE_BREAK));
 	}
@@ -130,16 +344,16 @@ static int
 rewind_head(struct mdoc *mdoc, int tok)
 {
 	struct mdoc_node *n;
-	int		  t;
-
-	assert(mdoc->last);
+	int		  c;
 
 	/* LINTED */
 	for (n = mdoc->last; n; n = n->parent) {
-		t = n->tok;
-		if (MDOC_HEAD == n->type && tok == t)
+		c = rewind_dohalt(tok, MDOC_HEAD, n);
+		if (REWIND_HALT == c)
+			return(1);
+		if (REWIND_REWIND == c)
 			break;
-		if (MDOC_NESTED & mdoc_macros[t].flags)
+		else if (rewind_dobreak(tok, MDOC_HEAD, n))
 			continue;
 		return(mdoc_verr(mdoc, n, ERR_SCOPE_BREAK));
 	}
@@ -153,16 +367,16 @@ static int
 rewind_expblock(struct mdoc *mdoc, int tok)
 {
 	struct mdoc_node *n;
-	int		  t;
-
-	n = mdoc->last ? mdoc->last->parent : NULL;
+	int		  c;
 
 	/* LINTED */
-	for ( ; n; n = n->parent) {
-		t = n->tok;
-		if (MDOC_BLOCK == n->type && tok == t)
+	for (n = mdoc->last; n; n = n->parent) {
+		c = rewind_dohalt(tok, MDOC_BLOCK, n);
+		if (REWIND_HALT == c)
+			return(mdoc_err(mdoc, ERR_SCOPE_NOCTX));
+		if (REWIND_REWIND == c)
 			break;
-		if (MDOC_NESTED & mdoc_macros[t].flags)
+		else if (rewind_dobreak(tok, MDOC_BLOCK, n))
 			continue;
 		return(mdoc_verr(mdoc, n, ERR_SCOPE_BREAK));
 	}
@@ -175,25 +389,22 @@ rewind_expblock(struct mdoc *mdoc, int tok)
 static int
 rewind_impblock(struct mdoc *mdoc, int tok)
 {
-	int		  t;
 	struct mdoc_node *n;
-
-	n = mdoc->last ? mdoc->last->parent : NULL;
+	int		  c;
 
 	/* LINTED */
-	for ( ; n; n = n->parent) {
-		t = n->tok;
-		if (MDOC_BLOCK == n->type && tok == t)
+	for (n = mdoc->last; n; n = n->parent) {
+		c = rewind_dohalt(tok, MDOC_BLOCK, n);
+		if (REWIND_HALT == c)
+			return(1);
+		else if (REWIND_REWIND == c)
 			break;
-		if ( ! (MDOC_EXPLICIT & mdoc_macros[t].flags))
+		else if (rewind_dobreak(tok, MDOC_BLOCK, n))
 			continue;
-		if (MDOC_NESTED & mdoc_macros[tok].flags)
-			return(1);
 		return(mdoc_verr(mdoc, n, ERR_SCOPE_BREAK));
 	}
 
-	if (NULL == n)
-		return(1);
+	assert(n);
 	return(rewind_last(mdoc, n));
 }
 
@@ -227,63 +438,12 @@ append_delims(struct mdoc *mdoc, int tok,
 
 /* ARGSUSED */
 int
-macro_close_explicit(MACRO_PROT_ARGS)
+macro_scoped_close(MACRO_PROT_ARGS)
 {
 	int	 	 tt, j, c, lastarg, maxargs, flushed;
 	char		*p;
 
 	switch (tok) {
-	case (MDOC_Ac):
-		tt = MDOC_Ao;
-		break;
-	case (MDOC_Bc):
-		tt = MDOC_Bo;
-		break;
-	case (MDOC_Dc):
-		tt = MDOC_Do;
-		break;
-	case (MDOC_Ec):
-		tt = MDOC_Eo;
-		break;
-	case (MDOC_Ed):
-		tt = MDOC_Bd;
-		break;
-	case (MDOC_Ef):
-		tt = MDOC_Bf;
-		break;
-	case (MDOC_Ek):
-		tt = MDOC_Bk;
-		break;
-	case (MDOC_El):
-		tt = MDOC_Bl;
-		break;
-	case (MDOC_Fc):
-		tt = MDOC_Fo;
-		break;
-	case (MDOC_Oc):
-		tt = MDOC_Oo;
-		break;
-	case (MDOC_Pc):
-		tt = MDOC_Po;
-		break;
-	case (MDOC_Qc):
-		tt = MDOC_Qo;
-		break;
-	case (MDOC_Re):
-		tt = MDOC_Rs;
-		break;
-	case (MDOC_Sc):
-		tt = MDOC_So;
-		break;
-	case (MDOC_Xc):
-		tt = MDOC_Xo;
-		break;
-	default:
-		abort();
-		/* NOTREACHED */
-	}
-
-	switch (tok) {
 	case (MDOC_Ec):
 		maxargs = 1;
 		break;
@@ -292,13 +452,18 @@ macro_close_explicit(MACRO_PROT_ARGS)
 		break;
 	}
 
+	tt = rewind_alt(tok);
+
 	if ( ! (MDOC_CALLABLE & mdoc_macros[tok].flags)) {
-		if (0 == buf[*pos])
-			return(rewind_expblock(mdoc, tt));
+		if (0 == buf[*pos]) {
+			if ( ! rewind_body(mdoc, tok))
+				return(0);
+			return(rewind_expblock(mdoc, tok));
+		}
 		return(mdoc_perr(mdoc, line, ppos, ERR_ARGS_EQ0));
 	}
 
-	if ( ! rewind_body(mdoc, tt))
+	if ( ! rewind_body(mdoc, tok))
 		return(0);
 
 	lastarg = ppos;
@@ -314,7 +479,7 @@ macro_close_explicit(MACRO_PROT_ARGS)
 		lastarg = *pos;
 
 		if (j == maxargs && ! flushed) {
-			if ( ! rewind_expblock(mdoc, tt))
+			if ( ! rewind_expblock(mdoc, tok))
 				return(0);
 			flushed = 1;
 		}
@@ -331,7 +496,7 @@ macro_close_explicit(MACRO_PROT_ARGS)
 			return(0);
 		else if (MDOC_MAX != c) {
 			if ( ! flushed) {
-				if ( ! rewind_expblock(mdoc, tt))
+				if ( ! rewind_expblock(mdoc, tok))
 					return(0);
 				flushed = 1;
 			}
@@ -348,7 +513,7 @@ macro_close_explicit(MACRO_PROT_ARGS)
 	if (MDOC_LINEARG_MAX == j)
 		return(mdoc_perr(mdoc, line, ppos, ERR_ARGS_MANY));
 
-	if ( ! flushed && ! rewind_expblock(mdoc, tt))
+	if ( ! flushed && ! rewind_expblock(mdoc, tok))
 		return(0);
 
 	if (ppos > 1)
@@ -485,9 +650,12 @@ macro_scoped(MACRO_PROT_ARGS)
 
 	assert ( ! (MDOC_CALLABLE & mdoc_macros[tok].flags));
 
-	if ( ! (MDOC_EXPLICIT & mdoc_macros[tok].flags)) 
+	if ( ! (MDOC_EXPLICIT & mdoc_macros[tok].flags)) {
+		if ( ! rewind_body(mdoc, tok))
+			return(0);
 		if ( ! rewind_impblock(mdoc, tok))
 			return(0);
+	}
 
 	for (argc = 0; argc < MDOC_LINEARG_MAX; argc++) {
 		lastarg = *pos;
@@ -629,6 +797,8 @@ macro_scoped_line(MACRO_PROT_ARGS)
 		if ( ! append_delims(mdoc, tok, line, pos, buf))
 			return(0);
 	}
+	if ( ! rewind_head(mdoc, tok))
+		return(0);
 	return(rewind_impblock(mdoc, tok));
 }
 
diff --git a/mdoc.c b/mdoc.c
index 9ab96374..2994c737 100644
--- a/mdoc.c
+++ b/mdoc.c
@@ -1,4 +1,4 @@
-/* $Id: mdoc.c,v 1.28 2009/01/12 16:39:57 kristaps Exp $ */
+/* $Id: mdoc.c,v 1.29 2009/01/14 11:58:24 kristaps Exp $ */
 /*
  * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
  *
@@ -94,10 +94,10 @@ const	struct mdoc_macro __mdoc_macros[MDOC_MAX] = {
 	{ macro_scoped_line, MDOC_PARSED }, /* D1 */
 	{ macro_scoped_line, MDOC_PARSED }, /* Dl */
 	{ macro_scoped, MDOC_EXPLICIT }, /* Bd */
-	{ macro_close_explicit, 0 }, /* Ed */
+	{ macro_scoped_close, MDOC_EXPLICIT }, /* Ed */
 	{ macro_scoped, MDOC_EXPLICIT }, /* Bl */
-	{ macro_close_explicit, 0 }, /* El */
-	{ macro_scoped, MDOC_NESTED | MDOC_PARSED | MDOC_TABSEP}, /* It */
+	{ macro_scoped_close, MDOC_EXPLICIT }, /* El */
+	{ macro_scoped, MDOC_PARSED | MDOC_TABSEP}, /* It */
 	{ macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Ad */ 
 	{ macro_constant, MDOC_PARSED }, /* An */
 	{ macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Ar */
@@ -137,58 +137,58 @@ const	struct mdoc_macro __mdoc_macros[MDOC_MAX] = {
 	{ macro_constant, MDOC_QUOTABLE }, /* %R */
 	{ macro_constant, MDOC_QUOTABLE }, /* %T */
 	{ macro_constant, MDOC_QUOTABLE }, /* %V */
-	{ macro_close_explicit, MDOC_CALLABLE | MDOC_PARSED }, /* Ac */
-	{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED }, /* Ao */
+	{ macro_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Ac */
+	{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Ao */
 	{ macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Aq */
 	{ macro_constant, 0 }, /* At */
-	{ macro_close_explicit, MDOC_CALLABLE | MDOC_PARSED }, /* Bc */
+	{ macro_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Bc */
 	{ macro_scoped, MDOC_EXPLICIT }, /* Bf */ 
-	{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED }, /* Bo */
+	{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Bo */
 	{ macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Bq */
 	{ macro_constant_delimited, MDOC_PARSED }, /* Bsx */
 	{ macro_constant_delimited, MDOC_PARSED }, /* Bx */
 	{ macro_constant, 0 }, /* Db */
-	{ macro_close_explicit, MDOC_CALLABLE | MDOC_PARSED }, /* Dc */
-	{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED }, /* Do */
+	{ macro_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Dc */
+	{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Do */
 	{ macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Dq */
-	{ macro_close_explicit, MDOC_CALLABLE | MDOC_PARSED }, /* Ec */
-	{ macro_close_explicit, 0 }, /* Ef */
+	{ macro_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Ec */
+	{ macro_scoped_close, MDOC_EXPLICIT }, /* Ef */
 	{ macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Em */ 
-	{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED }, /* Eo */
+	{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Eo */
 	{ macro_constant_delimited, MDOC_PARSED }, /* Fx */
 	{ macro_text, MDOC_PARSED }, /* Ms */
 	{ macro_constant_delimited, MDOC_CALLABLE | MDOC_PARSED }, /* No */
 	{ macro_constant_delimited, MDOC_CALLABLE | MDOC_PARSED }, /* Ns */
 	{ macro_constant_delimited, MDOC_PARSED }, /* Nx */
 	{ macro_constant_delimited, MDOC_PARSED }, /* Ox */
-	{ macro_close_explicit, MDOC_CALLABLE | MDOC_PARSED }, /* Pc */
+	{ macro_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Pc */
 	{ macro_constant, MDOC_PARSED }, /* Pf */
-	{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED }, /* Po */
+	{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Po */
 	{ macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Pq */
-	{ macro_close_explicit, MDOC_CALLABLE | MDOC_PARSED }, /* Qc */
+	{ macro_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Qc */
 	{ macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ql */
-	{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED }, /* Qo */
+	{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Qo */
 	{ macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Qq */
-	{ macro_close_explicit, 0 }, /* Re */
+	{ macro_scoped_close, MDOC_EXPLICIT }, /* Re */
 	{ macro_scoped, MDOC_EXPLICIT }, /* Rs */
-	{ macro_close_explicit, MDOC_CALLABLE | MDOC_PARSED }, /* Sc */
-	{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED }, /* So */
+	{ macro_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Sc */
+	{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* So */
 	{ macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Sq */
 	{ macro_constant, 0 }, /* Sm */
 	{ macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Sx */
 	{ macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Sy */
 	{ macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Tn */
 	{ macro_constant_delimited, MDOC_PARSED }, /* Ux */
-	{ macro_close_explicit, MDOC_CALLABLE | MDOC_PARSED }, /* Xc */
-	{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED }, /* Xo */
+	{ macro_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Xc */
+	{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Xo */
 	/* XXX - .Fo supposed to be (but isn't) callable. */
 	{ macro_scoped, MDOC_EXPLICIT | MDOC_PARSED }, /* Fo */ 
 	/* XXX - .Fc supposed to be (but isn't) callable. */
-	{ macro_close_explicit, MDOC_PARSED }, /* Fc */ 
-	{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED }, /* Oo */
-	{ macro_close_explicit, MDOC_CALLABLE | MDOC_PARSED }, /* Oc */
+	{ macro_scoped_close, MDOC_EXPLICIT | MDOC_PARSED }, /* Fc */ 
+	{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Oo */
+	{ macro_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Oc */
 	{ macro_scoped, MDOC_EXPLICIT }, /* Bk */
-	{ macro_close_explicit, 0 }, /* Ek */
+	{ macro_scoped_close, MDOC_EXPLICIT }, /* Ek */
 	{ macro_constant, 0 }, /* Bt */
 	{ macro_constant, 0 }, /* Hf */
 	{ macro_obsolete, 0 }, /* Fr */
diff --git a/mdoc.h b/mdoc.h
index 23444612..a083791d 100644
--- a/mdoc.h
+++ b/mdoc.h
@@ -1,4 +1,4 @@
-/* $Id: mdoc.h,v 1.20 2009/01/12 12:52:21 kristaps Exp $ */
+/* $Id: mdoc.h,v 1.21 2009/01/14 11:58:24 kristaps Exp $ */
 /*
  * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
  *
@@ -193,6 +193,8 @@
 #define	MDOC_Symbolic	 61
 #define	MDOC_ARG_MAX	 62
 
+/* FIXME: have these be generic groups. */
+
 enum 	mdoc_err {
 	ERR_SYNTAX_QUOTE, /* NOTUSED */
 	ERR_SYNTAX_UNQUOTE,
@@ -434,6 +436,8 @@ const struct mdoc_node
 		 *mdoc_result(struct mdoc *);
 int		  mdoc_endparse(struct mdoc *);
 
+char		 *mdoc_type2a(enum mdoc_type);
+
 __END_DECLS
 
 #endif /*!MDOC_H*/
diff --git a/mdocml.c b/mdocml.c
index f3afbf21..0175a3e5 100644
--- a/mdocml.c
+++ b/mdocml.c
@@ -1,4 +1,4 @@
-/* $Id: mdocml.c,v 1.41 2009/01/12 16:39:57 kristaps Exp $ */
+/* $Id: mdocml.c,v 1.42 2009/01/14 11:58:24 kristaps Exp $ */
 /*
  * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
  *
@@ -192,40 +192,34 @@ print_node(const struct mdoc_node *n, int indent)
 	params = NULL;
 	sz = 0;
 
-	/* FIXME: put parts of this in util.c. */
+	t = mdoc_type2a(n->type);
+
 	switch (n->type) {
 	case (MDOC_TEXT):
 		assert(NULL == n->child);
 		p = n->data.text.string;
-		t = "text";
 		break;
 	case (MDOC_BODY):
 		p = mdoc_macronames[n->tok];
-		t = "block-body";
 		break;
 	case (MDOC_HEAD):
 		p = mdoc_macronames[n->tok];
-		t = "block-head";
 		break;
 	case (MDOC_TAIL):
 		p = mdoc_macronames[n->tok];
-		t = "block-tail";
 		break;
 	case (MDOC_ELEM):
 		p = mdoc_macronames[n->tok];
-		t = "element";
 		argv = n->data.elem.argv;
 		argc = n->data.elem.argc;
 		break;
 	case (MDOC_BLOCK):
 		p = mdoc_macronames[n->tok];
-		t = "block";
 		argv = n->data.block.argv;
 		argc = n->data.block.argc;
 		break;
 	case (MDOC_ROOT):
 		p = "root";
-		t = "root";
 		break;
 	default:
 		abort();
@@ -238,11 +232,11 @@ print_node(const struct mdoc_node *n, int indent)
 
 	for (i = 0; i < (int)argc; i++) {
 		(void)printf(" -%s", mdoc_argnames[argv[i].arg]);
-		if (j > 0)
+		if (argv[i].sz > 0)
 			(void)printf(" [");
 		for (j = 0; j < (int)argv[i].sz; j++)
 			(void)printf(" [%s]", argv[i].value[j]);
-		if (j > 0)
+		if (argv[i].sz > 0)
 			(void)printf(" ]");
 	}
 
@@ -361,8 +355,7 @@ msg_err(void *arg, int line, int col, enum mdoc_err type)
 		lit = "syntax: unknown argument for macro";
 		break;
 	case (ERR_SCOPE_BREAK):
-		/* Which scope is broken? */
-		lit = "scope: macro breaks prior explicit scope";
+		lit = "scope: macro breaks prior scope";
 		break;
 	case (ERR_SCOPE_NOCTX):
 		lit = "scope: closure macro has no context";
diff --git a/private.h b/private.h
index 10559e77..42c1b85c 100644
--- a/private.h
+++ b/private.h
@@ -1,4 +1,4 @@
-/* $Id: private.h,v 1.62 2009/01/12 16:39:57 kristaps Exp $ */
+/* $Id: private.h,v 1.63 2009/01/14 11:58:24 kristaps Exp $ */
 /*
  * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
  *
@@ -52,8 +52,7 @@ struct	mdoc_macro {
 #define	MDOC_EXPLICIT	(1 << 2)
 #define	MDOC_QUOTABLE	(1 << 3)
 #define	MDOC_PROLOGUE	(1 << 4)
-#define	MDOC_NESTED	(1 << 5)
-#define	MDOC_TABSEP	(1 << 6)
+#define	MDOC_TABSEP	(1 << 5)
 };
 
 extern	const struct mdoc_macro *const mdoc_macros;
@@ -133,7 +132,7 @@ int		  macro_constant_scoped(MACRO_PROT_ARGS);
 int		  macro_constant_delimited(MACRO_PROT_ARGS);
 int		  macro_text(MACRO_PROT_ARGS);
 int		  macro_scoped(MACRO_PROT_ARGS);
-int		  macro_close_explicit(MACRO_PROT_ARGS);
+int		  macro_scoped_close(MACRO_PROT_ARGS);
 int		  macro_scoped_line(MACRO_PROT_ARGS);
 int		  macro_prologue(MACRO_PROT_ARGS);
 int		  macro_end(struct mdoc *);
diff --git a/strings.c b/strings.c
index 3b10c770..c985240f 100644
--- a/strings.c
+++ b/strings.c
@@ -1,4 +1,4 @@
-/* $Id: strings.c,v 1.5 2009/01/06 15:49:44 kristaps Exp $ */
+/* $Id: strings.c,v 1.6 2009/01/14 11:58:24 kristaps Exp $ */
 /*
  * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
  *
@@ -307,3 +307,30 @@ mdoc_atoatt(const char *p)
 	
 	return(ATT_DEFAULT);
 }
+
+
+char *
+mdoc_type2a(enum mdoc_type type)
+{
+	switch (type) {
+	case (MDOC_ROOT):
+		return("root");
+	case (MDOC_BLOCK):
+		return("block");
+	case (MDOC_HEAD):
+		return("block-head");
+	case (MDOC_BODY):
+		return("block-body");
+	case (MDOC_TAIL):
+		return("block-tail");
+	case (MDOC_ELEM):
+		return("elem");
+	case (MDOC_TEXT):
+		return("text");
+	default:
+		break;
+	}
+
+	abort();
+	/* NOTREACHED */
+}
diff --git a/validate.c b/validate.c
index 87f686ac..9c4fc706 100644
--- a/validate.c
+++ b/validate.c
@@ -1,4 +1,4 @@
-/* $Id: validate.c,v 1.27 2009/01/12 17:26:42 kristaps Exp $ */
+/* $Id: validate.c,v 1.28 2009/01/14 11:58:24 kristaps Exp $ */
 /*
  * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
  *
@@ -79,8 +79,10 @@ const	struct valids mdoc_valids[MDOC_MAX] = {
 	{ pres_prologue, NULL }, /* Os */
 	/* FIXME: preceding Pp. */ 
 	/* FIXME: NAME section internal ordering. */
+	/* FIXME: can only be a child of root. */
 	{ NULL, posts_sh }, /* Sh */ 
 	/* FIXME: preceding Pp. */
+	/* FIXME: can only be a child of Sh. */
 	{ NULL, posts_ss }, /* Ss */ 
 	/* FIXME: proceeding... */
 	{ NULL, posts_pp }, /* Pp */