Adding mdoclint.1 manual.

[mandoc.git] / macro.c

diff --git a/macro.c b/macro.c
index 6cc2895347b89e8c0b8aae5960b453c94ccc20b9..acf94fc063c2f56b3d9b4bb41f00201672a27cae 100644 (file)
--- a/macro.c
+++ b/macro.c
@@ -1,4 +1,4 @@
-/* $Id: macro.c,v 1.25 2009/01/07 15:53:00 kristaps Exp $ */
+/* $Id: macro.c,v 1.51 2009/02/23 12:45:19 kristaps Exp $ */

 /*
  * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
  *
 /*
  * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
  *


@@ -25,163 +25,559 @@
 #include <time.h>
 #endif
 
 #include <time.h>
 #endif
 

-#include "private.h"
+/*
+ * This has scanning/parsing routines, each of which extract a macro and
+ * its arguments and parameters, then know how to progress to the next
+ * macro. 
+ */

 
 

-/* FIXME: maxlineargs should be per LINE, no per TOKEN. */
+#include "private.h"

 
 

-static int       rewind_elem(struct mdoc *, int, int);
-static int       rewind_impblock(struct mdoc *, int, int);
+static int       macro_obsolete(MACRO_PROT_ARGS);
+static int       macro_constant(MACRO_PROT_ARGS);
+static int       macro_constant_scoped(MACRO_PROT_ARGS);
+static int       macro_constant_delimited(MACRO_PROT_ARGS);
+static int       macro_text(MACRO_PROT_ARGS);
+static int       macro_scoped(MACRO_PROT_ARGS);
+static int       macro_scoped_close(MACRO_PROT_ARGS);
+static int       macro_scoped_line(MACRO_PROT_ARGS);
+
+#define        REWIND_REWIND   (1 << 0)
+#define        REWIND_NOHALT   (1 << 1)
+#define        REWIND_HALT     (1 << 2)
+
+static int       rewind_dohalt(int, enum mdoc_type, 
+                       const struct mdoc_node *);
+static int       rewind_alt(int);
+static int       rewind_dobreak(int, const struct mdoc_node *);
+static int       rewind_elem(struct mdoc *, int);
+static int       rewind_impblock(struct mdoc *, int, int, int);

 static int       rewind_expblock(struct mdoc *, int, int, int);
 static int       rewind_expblock(struct mdoc *, int, int, int);

-static int       rewind_head(struct mdoc *, int, int);
-static int       rewind_body(struct mdoc *, int, int, int);
-static int       rewind_last(struct mdoc *, int, struct mdoc_node *);
+static int       rewind_subblock(enum mdoc_type, 
+                       struct mdoc *, int, int, int);
+static int       rewind_last(struct mdoc *, struct mdoc_node *);

 static int       append_delims(struct mdoc *, int, int *, char *);
 static int       append_delims(struct mdoc *, int, int *, char *);

-static int       lookup(struct mdoc *, int, const char *);
+static int       lookup(struct mdoc *, int, int, int, const char *);
+static int       pwarn(struct mdoc *, int, int, int);
+static int       perr(struct mdoc *, int, int, int);
+
+#define        WMACPARM        (1)
+#define        WOBS            (2)
+
+#define        ENOCTX          (1)
+#define        ENOPARMS        (2)
+#define        EARGVLIM        (3)
+
+/* Central table of library: who gets parsed how. */
+
+const  struct mdoc_macro __mdoc_macros[MDOC_MAX] = {
+       { NULL, 0 }, /* \" */
+       { macro_constant, MDOC_PROLOGUE }, /* Dd */
+       { macro_constant, MDOC_PROLOGUE }, /* Dt */
+       { macro_constant, MDOC_PROLOGUE }, /* Os */
+       { macro_scoped, 0 }, /* Sh */
+       { macro_scoped, 0 }, /* Ss */ 
+       { macro_text, 0 }, /* Pp */ 
+       { macro_scoped_line, MDOC_PARSED }, /* D1 */
+       { macro_scoped_line, MDOC_PARSED }, /* Dl */
+       { macro_scoped, MDOC_EXPLICIT }, /* Bd */
+       { macro_scoped_close, MDOC_EXPLICIT }, /* Ed */
+       { macro_scoped, MDOC_EXPLICIT }, /* Bl */
+       { macro_scoped_close, MDOC_EXPLICIT }, /* El */
+       { macro_scoped, MDOC_PARSED }, /* It */
+       { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Ad */ 
+       { macro_text, MDOC_PARSED }, /* An */
+       { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Ar */
+       { macro_constant, 0 }, /* Cd */
+       { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Cm */
+       { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Dv */ 
+       { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Er */ 
+       { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Ev */ 
+       { macro_constant, 0 }, /* Ex */
+       { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Fa */ 
+       { macro_constant, 0 }, /* Fd */ 
+       { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Fl */
+       { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Fn */ 
+       { macro_text, MDOC_PARSED }, /* Ft */ 
+       { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Ic */ 
+       { macro_constant, 0 }, /* In */ 
+       { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Li */
+       { macro_constant, 0 }, /* Nd */ 
+       { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Nm */ 
+       { macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Op */
+       { macro_obsolete, 0 }, /* Ot */
+       { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Pa */
+       { macro_constant, 0 }, /* Rv */
+       /* XXX - .St supposed to be (but isn't) callable. */
+       { macro_constant_delimited, MDOC_PARSED }, /* St */ 
+       { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Va */
+       { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Vt */ 
+       { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Xr */
+       { macro_constant, 0 }, /* %A */
+       { macro_constant, 0 }, /* %B */
+       { macro_constant, 0 }, /* %D */
+       { macro_constant, 0 }, /* %I */
+       { macro_constant, 0 }, /* %J */
+       { macro_constant, 0 }, /* %N */
+       { macro_constant, 0 }, /* %O */
+       { macro_constant, 0 }, /* %P */
+       { macro_constant, 0 }, /* %R */
+       { macro_constant, 0 }, /* %T */
+       { macro_constant, 0 }, /* %V */
+       { 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_delimited, 0 }, /* At */
+       { macro_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Bc */
+       { macro_scoped, MDOC_EXPLICIT }, /* Bf */ 
+       { 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_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_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 | 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_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Pc */
+       { macro_constant_delimited, MDOC_PARSED }, /* Pf */
+       { macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Po */
+       { macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Pq */
+       { 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 | MDOC_EXPLICIT }, /* Qo */
+       { macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Qq */
+       { macro_scoped_close, MDOC_EXPLICIT }, /* Re */
+       { macro_scoped, MDOC_EXPLICIT }, /* Rs */
+       { 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_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 }, /* Fo */ 
+       /* XXX - .Fc supposed to be (but isn't) callable. */
+       { macro_scoped_close, MDOC_EXPLICIT }, /* 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_scoped_close, MDOC_EXPLICIT }, /* Ek */
+       { macro_constant, 0 }, /* Bt */
+       { macro_constant, 0 }, /* Hf */
+       { macro_obsolete, 0 }, /* Fr */
+       { macro_constant, 0 }, /* Ud */
+};
+
+const  struct mdoc_macro * const mdoc_macros = __mdoc_macros;

 
 
 static int
 
 
 static int

-lookup(struct mdoc *mdoc, int from, const char *p)
+perr(struct mdoc *mdoc, int line, int pos, int type)
+{
+       int              c;
+
+       switch (type) {
+       case (ENOCTX):
+               c = mdoc_perr(mdoc, line, pos, 
+                               "closing macro has prior context");
+               break;
+       case (ENOPARMS):
+               c = mdoc_perr(mdoc, line, pos, 
+                               "macro doesn't expect parameters");
+               break;
+       case (EARGVLIM):
+               c = mdoc_perr(mdoc, line, pos, 
+                               "argument hard-limit %d reached",
+                               MDOC_LINEARG_MAX);
+               break;
+       default:
+               abort();
+               /* NOTREACHED */
+       }
+       return(c);
+}
+
+static int
+pwarn(struct mdoc *mdoc, int line, int pos, int type)

 {
 {

+       int              c;

 
 

-       if ( ! (MDOC_PARSED & mdoc_macros[from].flags))
-               return(MDOC_MAX);
-       return(mdoc_find(mdoc, p));
+       switch (type) {
+       case (WMACPARM):
+               c = mdoc_pwarn(mdoc, line, pos, WARN_SYNTAX,
+                               "macro-like parameter");
+               break;
+       case (WOBS):
+               c = mdoc_pwarn(mdoc, line, pos, WARN_SYNTAX,
+                               "macro is marked obsolete");
+               break;
+       default:
+               abort();
+               /* NOTREACHED */
+       }
+       return(c);
+}
+
+
+static int
+lookup(struct mdoc *mdoc, int line, int pos, int from, const char *p)
+{
+       int              res;
+
+       res = mdoc_find(mdoc, p);
+       if (MDOC_PARSED & mdoc_macros[from].flags)
+               return(res);
+       if (MDOC_MAX == res)
+               return(res);
+       if ( ! pwarn(mdoc, line, pos, WMACPARM))
+               return(-1);
+       return(MDOC_MAX);

 }
 
 
 static int
 }
 
 
 static int

-rewind_last(struct mdoc *mdoc, int ppos, struct mdoc_node *to)
+rewind_last(struct mdoc *mdoc, struct mdoc_node *to)

 {
 
        assert(to);
 {
 
        assert(to);

+       mdoc->next = MDOC_NEXT_SIBLING;
+
+       /* LINTED */

        while (mdoc->last != to) {
        while (mdoc->last != to) {

-               if ( ! mdoc_valid_post(mdoc, ppos))
+               if ( ! mdoc_valid_post(mdoc))

                        return(0);
                        return(0);

-               if ( ! mdoc_action(mdoc, ppos))
+               if ( ! mdoc_action_post(mdoc))

                        return(0);
                mdoc->last = mdoc->last->parent;
                assert(mdoc->last);
        }
                        return(0);
                mdoc->last = mdoc->last->parent;
                assert(mdoc->last);
        }

-       mdoc->next = MDOC_NEXT_SIBLING;
-       if ( ! mdoc_valid_post(mdoc, ppos))
+
+       if ( ! mdoc_valid_post(mdoc))

                return(0);
                return(0);

-       return(mdoc_action(mdoc, ppos));
+       return(mdoc_action_post(mdoc));

 }
 
 
 static int
 }
 
 
 static int

-rewind_elem(struct mdoc *mdoc, int ppos, int tok)
+rewind_alt(int tok)

 {
 {

-       struct mdoc_node *n;
+       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 */
+}

 
 

-       n = mdoc->last;
-       if (MDOC_ELEM != n->type)
-               n = n->parent;
-       assert(MDOC_ELEM == n->type);
-       assert(tok == n->data.elem.tok);

 
 

-       return(rewind_last(mdoc, ppos, n));
+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_VALID & p->flags)
+               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_HEAD != 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_BODY == p->type && MDOC_Bl == p->tok)
+                       return(REWIND_HALT);
+               break;
+       case (MDOC_Sh):
+               if (type == p->type && tok == p->tok)
+                       return(REWIND_REWIND);
+               break;
+       case (MDOC_Ss):
+               assert(MDOC_TAIL != type);
+               if (type == p->type && tok == p->tok)
+                       return(REWIND_REWIND);
+               if (MDOC_BODY == p->type && MDOC_Sh == p->tok)
+                       return(REWIND_HALT);
+               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
 }
 
 
 static int

-rewind_body(struct mdoc *mdoc, int ppos, int tok, int tt)
+rewind_dobreak(int tok, const struct mdoc_node *p)

 {
 {

-       struct mdoc_node *n;
-       int               t;

 
 

-       /* LINTED */
-       for (n = mdoc->last; n; n = n->parent) {
-               if (MDOC_BODY != n->type) 
-                       continue;
-               if (tt == (t = n->data.head.tok))
-                       break;
-               if ( ! (MDOC_EXPLICIT & mdoc_macros[t].flags))
-                       continue;
-               return(mdoc_err(mdoc, tok, ppos, ERR_SCOPE_BREAK));
+       assert(MDOC_ROOT != p->type);
+       if (MDOC_ELEM == p->type)
+               return(1);
+       if (MDOC_TEXT == p->type)
+               return(1);
+       if (MDOC_VALID & p->flags)
+               return(1);
+
+       switch (tok) {
+       /* Implicit rules. */
+       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);
+
+       /* Extra scope rules. */
+       case (MDOC_El):
+               if (MDOC_It == p->tok)
+                       return(1);
+               break;
+       default:
+               break;

        }
 
        }
 

-       assert(n);
-       return(rewind_last(mdoc, ppos, n));
+       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;
+
+       n = mdoc->last;
+       if (MDOC_ELEM != n->type)
+               n = n->parent;
+       assert(MDOC_ELEM == n->type);
+       assert(tok == n->tok);
+
+       return(rewind_last(mdoc, n));

 }
 
 
 static int
 }
 
 
 static int

-rewind_head(struct mdoc *mdoc, int ppos, int tok)
+rewind_subblock(enum mdoc_type type, struct mdoc *mdoc, 
+               int tok, int line, int ppos)

 {
        struct mdoc_node *n;
 {
        struct mdoc_node *n;

-       int               t;
+       int               c;

 
        /* LINTED */
        for (n = mdoc->last; n; n = n->parent) {
 
        /* LINTED */
        for (n = mdoc->last; n; n = n->parent) {

-               if (MDOC_HEAD != n->type) 
-                       continue;
-               if (tok == (t = n->data.head.tok))
+               c = rewind_dohalt(tok, type, n);
+               if (REWIND_HALT == c)
+                       return(1);
+               if (REWIND_REWIND == c)

                        break;
                        break;

-               if ( ! (MDOC_EXPLICIT & mdoc_macros[t].flags))
+               else if (rewind_dobreak(tok, n))

                        continue;
                        continue;

-               return(mdoc_err(mdoc, tok, ppos, ERR_SCOPE_BREAK));
+               return(mdoc_perr(mdoc, line, ppos, "scope breaks prior %s", mdoc_node2a(n)));

        }
 
        assert(n);
        }
 
        assert(n);

-       return(rewind_last(mdoc, ppos, n));
+       return(rewind_last(mdoc, n));

 }
 
 
 static int
 }
 
 
 static int

-rewind_expblock(struct mdoc *mdoc, int ppos, int tok, int tt)
+rewind_expblock(struct mdoc *mdoc, int tok, int line, int ppos)

 {
        struct mdoc_node *n;
 {
        struct mdoc_node *n;

-       int               t;
-
-       assert(mdoc->last);
+       int               c;

 
        /* LINTED */
 
        /* LINTED */

-       for (n = mdoc->last->parent; n; n = n->parent) {
-               if (MDOC_BLOCK != n->type) 
-                       continue;
-               if (tt == (t = n->data.block.tok))
+       for (n = mdoc->last; n; n = n->parent) {
+               c = rewind_dohalt(tok, MDOC_BLOCK, n);
+               if (REWIND_HALT == c)
+                       return(perr(mdoc, line, ppos, ENOCTX));
+               if (REWIND_REWIND == c)

                        break;
                        break;

-               if (MDOC_NESTED & mdoc_macros[t].flags)
+               else if (rewind_dobreak(tok, n))

                        continue;
                        continue;

-               return(mdoc_err(mdoc, tok, ppos, ERR_SCOPE_BREAK));
+               return(mdoc_perr(mdoc, line, ppos, 
+                                       "scope breaks prior %s", 
+                                       mdoc_node2a(n)));

        }
 
        }
 

-       if (NULL == n)
-               return(mdoc_err(mdoc, tok, ppos, ERR_SCOPE_NOCTX));
-       return(rewind_last(mdoc, ppos, n));
+       assert(n);
+       return(rewind_last(mdoc, n));

 }
 
 
 static int
 }
 
 
 static int

-rewind_impblock(struct mdoc *mdoc, int ppos, int tok)
+rewind_impblock(struct mdoc *mdoc, int tok, int line, int ppos)

 {
        struct mdoc_node *n;
 {
        struct mdoc_node *n;

-       int               t;
-
-       n = mdoc->last ? mdoc->last->parent : NULL;
+       int               c;

 
        /* LINTED */
 
        /* LINTED */

-       for ( ; n; n = n->parent) {
-               if (MDOC_BLOCK != n->type) 
-                       continue;
-               if (tok == (t = n->data.block.tok))
+       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;
                        break;

-               if ( ! (MDOC_EXPLICIT & mdoc_macros[t].flags))
+               else if (rewind_dobreak(tok, n))

                        continue;
                        continue;

-               if (MDOC_NESTED & mdoc_macros[tok].flags)
-                       return(1);
-               return(mdoc_err(mdoc, tok, ppos, ERR_SCOPE_BREAK));
+               return(mdoc_perr(mdoc, line, ppos, 
+                                       "scope breaks prior %s", 
+                                       mdoc_node2a(n)));

        }
 
        }
 

-       if (NULL == n)
-               return(1);
-       return(rewind_last(mdoc, ppos, n));
+       assert(n);
+       return(rewind_last(mdoc, n));

 }
 
 
 static int
 }
 
 
 static int

-append_delims(struct mdoc *mdoc, int tok, int *pos, char *buf)
+append_delims(struct mdoc *mdoc, int line, int *pos, char *buf)

 {
        int              c, lastarg;
        char            *p;
 {
        int              c, lastarg;
        char            *p;


@@ -191,13 +587,16 @@ append_delims(struct mdoc *mdoc, int tok, int *pos, char *buf)
 
        for (;;) {
                lastarg = *pos;
 
        for (;;) {
                lastarg = *pos;

-               c = mdoc_args(mdoc, tok, pos, buf, 0, &p);
+               c = mdoc_args(mdoc, line, pos, buf, 0, &p);
+               assert(ARGS_PHRASE != c);
+

                if (ARGS_ERROR == c)
                        return(0);
                else if (ARGS_EOLN == c)
                        break;
                assert(mdoc_isdelim(p));
                if (ARGS_ERROR == c)
                        return(0);
                else if (ARGS_EOLN == c)
                        break;
                assert(mdoc_isdelim(p));

-               mdoc_word_alloc(mdoc, lastarg, p);
+               if ( ! mdoc_word_alloc(mdoc, line, lastarg, p))
+                       return(0);

                mdoc->next = MDOC_NEXT_SIBLING;
        }
 
                mdoc->next = MDOC_NEXT_SIBLING;
        }
 


@@ -205,64 +604,16 @@ append_delims(struct mdoc *mdoc, int tok, int *pos, char *buf)
 }
 
 
 }
 
 

-/* ARGSUSED */
-int
-macro_close_explicit(MACRO_PROT_ARGS)
+/*
+ * Close out an explicit scope.  This optionally parses a TAIL type with
+ * a set number of TEXT children.
+ */
+static int
+macro_scoped_close(MACRO_PROT_ARGS)

 {
 {

-       int              tt, j, c, lastarg, maxargs, flushed;
+       int              tt, j, c, lastarg, maxargs, flushed;

        char            *p;
 
        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;
        switch (tok) {
        case (MDOC_Ec):
                maxargs = 1;


@@ -272,35 +623,45 @@ macro_close_explicit(MACRO_PROT_ARGS)
                break;
        }
 
                break;
        }
 

+       tt = rewind_alt(tok);
+
+       mdoc_msg(mdoc, "parse: %s closing %s",
+                       mdoc_macronames[tok], mdoc_macronames[tt]);
+

        if ( ! (MDOC_CALLABLE & mdoc_macros[tok].flags)) {
        if ( ! (MDOC_CALLABLE & mdoc_macros[tok].flags)) {

-               if ( ! rewind_expblock(mdoc, ppos, tok, tt))
-                       return(0);
-               if (0 != buf[*pos])
-                       return(mdoc_err(mdoc, tok, *pos, ERR_ARGS_EQ0));
-               return(1);
+               if (0 == buf[*pos]) {
+                       if ( ! rewind_subblock(MDOC_BODY, mdoc, 
+                                               tok, line, ppos))
+                               return(0);
+                       return(rewind_expblock(mdoc, tok, line, ppos));
+               }
+               return(perr(mdoc, line, ppos, ENOPARMS));

        }
 
        }
 

-       if ( ! rewind_body(mdoc, ppos, tok, tt))
+       if ( ! rewind_subblock(MDOC_BODY, mdoc, tok, line, ppos))

                return(0);
 
        lastarg = ppos;
        flushed = 0;
 
        if (maxargs > 0) {
                return(0);
 
        lastarg = ppos;
        flushed = 0;
 
        if (maxargs > 0) {

-               mdoc_tail_alloc(mdoc, ppos, tt);
+               if ( ! mdoc_tail_alloc(mdoc, line, ppos, tt))
+                       return(0);

                mdoc->next = MDOC_NEXT_CHILD;
        }
 
                mdoc->next = MDOC_NEXT_CHILD;
        }
 

-       for (j = 0; j < MDOC_LINEARG_MAX; j++) {
+       for (j = 0; /* No sentinel. */; j++) {

                lastarg = *pos;
 
                if (j == maxargs && ! flushed) {
                lastarg = *pos;
 
                if (j == maxargs && ! flushed) {

-                       if ( ! rewind_expblock(mdoc, ppos, tok, tt))
+                       if ( ! rewind_expblock(mdoc, tok, line, ppos))

                                return(0);
                        flushed = 1;
                }
 
                                return(0);
                        flushed = 1;
                }
 

-               c = mdoc_args(mdoc, tok, pos, buf, ARGS_DELIM, &p);
+               c = mdoc_args(mdoc, line, pos, buf, tok, &p);
+               assert(ARGS_PHRASE != c);
+

                if (ARGS_ERROR == c)
                        return(0);
                if (ARGS_PUNCT == c)
                if (ARGS_ERROR == c)
                        return(0);
                if (ARGS_PUNCT == c)


@@ -308,216 +669,297 @@ macro_close_explicit(MACRO_PROT_ARGS)
                if (ARGS_EOLN == c)
                        break;
 
                if (ARGS_EOLN == c)
                        break;
 

-               if (MDOC_MAX != (c = lookup(mdoc, tok, p))) {
+               if (-1 == (c = lookup(mdoc, line, lastarg, tok, p)))
+                       return(0);
+               else if (MDOC_MAX != c) {

                        if ( ! flushed) {
                        if ( ! flushed) {

-                               if ( ! rewind_expblock(mdoc, ppos, tok, tt))
+                               if ( ! rewind_expblock(mdoc, tok, 
+                                                       line, ppos))

                                        return(0);
                                flushed = 1;
                        }
                                        return(0);
                                flushed = 1;
                        }

-                       if ( ! mdoc_macro(mdoc, c, lastarg, pos, buf))
+                       if ( ! mdoc_macro(mdoc, c, line, lastarg, pos, buf))

                                return(0);
                        break;
                                return(0);
                        break;

-               }
+               } 

 
 

-               mdoc_word_alloc(mdoc, lastarg, p);
+               if ( ! mdoc_word_alloc(mdoc, line, lastarg, p))
+                       return(0);

                mdoc->next = MDOC_NEXT_SIBLING;
        }
 
                mdoc->next = MDOC_NEXT_SIBLING;
        }
 

-       if (MDOC_LINEARG_MAX == j)
-               return(mdoc_err(mdoc, tok, lastarg, ERR_ARGS_MANY));
-
-       if ( ! flushed) 
-               if ( ! rewind_expblock(mdoc, ppos, tok, tt))
-                       return(0);
+       if ( ! flushed && ! rewind_expblock(mdoc, tok, line, ppos))
+               return(0);

 
        if (ppos > 1)
                return(1);
 
        if (ppos > 1)
                return(1);

-       return(append_delims(mdoc, tok, pos, buf));
+       return(append_delims(mdoc, line, pos, buf));

 }
 
 
 /*
 }
 
 
 /*

- * A general text domain macro.  When invoked, this opens a scope that
- * accepts words until either end-of-line, only-punctuation, or a
- * callable macro.  If the word is punctuation (not only-punctuation),
- * then the scope is closed out, the punctuation appended, then the
- * scope opened again.  If any terminating conditions are met, the scope
- * is closed out.  If this is the first macro in the line and
- * only-punctuation remains, this punctuation is flushed.
+ * A general text macro.  This is a complex case because of punctuation.
+ * If a text macro is followed by words, then punctuation, the macro is
+ * "stopped" and "reopened" following the punctuation.  Thus, the
+ * following arises:
+ *
+ *    .Fl a ; b
+ *
+ *    ELEMENT (.Fl)
+ *        TEXT (`a')
+ *    TEXT (`;')
+ *    ELEMENT (.Fl)
+ *        TEXT (`b')
+ *
+ * This must handle the following situations:
+ *
+ *    .Fl Ar b ; ;
+ *
+ *    ELEMENT (.Fl)
+ *    ELEMENT (.Ar)
+ *        TEXT (`b')
+ *    TEXT (`;')
+ *    TEXT (`;')

  */
  */

-int
+static int

 macro_text(MACRO_PROT_ARGS)
 {
 macro_text(MACRO_PROT_ARGS)
 {

-       int               lastarg, lastpunct, c, sz, fl, argc;
+       int               la, lastpunct, c, w, argc;

        struct mdoc_arg   argv[MDOC_LINEARG_MAX];
        char             *p;
 
        struct mdoc_arg   argv[MDOC_LINEARG_MAX];
        char             *p;
 

-       lastarg = ppos;
+       la = ppos;

        lastpunct = 0;
 
        for (argc = 0; argc < MDOC_LINEARG_MAX; argc++) {
        lastpunct = 0;
 
        for (argc = 0; argc < MDOC_LINEARG_MAX; argc++) {

-               lastarg = *pos;
-
-               c = mdoc_argv(mdoc, tok, &argv[argc], pos, buf);
-               if (ARGV_EOLN == c || ARGV_WORD == c)
+               la = *pos;
+               c = mdoc_argv(mdoc, line, tok, &argv[argc], pos, buf);
+               if (ARGV_EOLN == c)

                        break;
                        break;

-               else if (ARGV_ARG == c)
+               if (ARGV_WORD == c) {
+                       *pos = la;
+                       break;
+               } else if (ARGV_ARG == c)

                        continue;
                        continue;

+

                mdoc_argv_free(argc, argv);
                return(0);
        }
 
                mdoc_argv_free(argc, argv);
                return(0);
        }
 

-       if ( ! mdoc_valid_pre(mdoc, tok, ppos, argc, argv)) {
+       if (MDOC_LINEARG_MAX == argc) {
+               mdoc_argv_free(argc - 1, argv);
+               return(perr(mdoc, line, ppos, EARGVLIM));
+       }
+
+       c = mdoc_elem_alloc(mdoc, line, ppos, tok, argc, argv);
+
+       if (0 == c) {

                mdoc_argv_free(argc, argv);
                return(0);
        }
 
                mdoc_argv_free(argc, argv);
                return(0);
        }
 

-       fl = ARGS_DELIM;
-       if (MDOC_QUOTABLE & mdoc_macros[tok].flags)
-               fl |= ARGS_QUOTED;
-
-       mdoc_elem_alloc(mdoc, lastarg, tok, argc, argv);

        mdoc->next = MDOC_NEXT_CHILD;
 
        mdoc->next = MDOC_NEXT_CHILD;
 

-       for (lastpunct = sz = 0; sz + argc < MDOC_LINEARG_MAX; sz++) {
-               lastarg = *pos;
-
-               if (lastpunct) {
-                       mdoc_elem_alloc(mdoc, lastarg, tok, argc, argv);
-                       mdoc->next = MDOC_NEXT_CHILD;
-                       lastpunct = 0;
-               }
+       lastpunct = 0;
+       for (;;) {
+               la = *pos;
+               w = mdoc_args(mdoc, line, pos, buf, tok, &p);
+               assert(ARGS_PHRASE != c);

 
 

-               c = mdoc_args(mdoc, tok, pos, buf, fl, &p);
-               if (ARGS_ERROR == c) {
+               if (ARGS_ERROR == w) {

                        mdoc_argv_free(argc, argv);
                        return(0);
                }
 
                        mdoc_argv_free(argc, argv);
                        return(0);
                }
 

-               if (ARGS_EOLN == c)
+               if (ARGS_EOLN == w)

                        break;
                        break;

-               if (ARGS_PUNCT == c)
+               if (ARGS_PUNCT == w)

                        break;
 
                        break;
 

-               if (MDOC_MAX != (c = lookup(mdoc, tok, p))) {
-                       if ( ! rewind_elem(mdoc, ppos, tok)) {
+               c = ARGS_QWORD == w ? MDOC_MAX :
+                       lookup(mdoc, line, la, tok, p);
+
+               if (MDOC_MAX != c && -1 != c) {
+                       if (0 == lastpunct && ! rewind_elem(mdoc, tok)) {

                                mdoc_argv_free(argc, argv);
                                return(0);
                        }
                        mdoc_argv_free(argc, argv);
                                mdoc_argv_free(argc, argv);
                                return(0);
                        }
                        mdoc_argv_free(argc, argv);

-                       if ( ! mdoc_macro(mdoc, c, lastarg, pos, buf))
+                       c = mdoc_macro(mdoc, c, line, la, pos, buf);
+                       if (0 == c)

                                return(0);
                        if (ppos > 1)
                                return(1);
                                return(0);
                        if (ppos > 1)
                                return(1);

-                       return(append_delims(mdoc, tok, pos, buf));
+                       return(append_delims(mdoc, line, pos, buf));
+               } else if (-1 == c) {
+                       mdoc_argv_free(argc, argv);
+                       return(0);

                }
 
                }
 

-               if (mdoc_isdelim(p)) {
-                       if ( ! rewind_elem(mdoc, ppos, tok)) {
+               if (ARGS_QWORD != w && mdoc_isdelim(p)) {
+                       if (0 == lastpunct && ! rewind_elem(mdoc, tok)) {

                                mdoc_argv_free(argc, argv);
                                return(0);
                        }
                        lastpunct = 1;
                                mdoc_argv_free(argc, argv);
                                return(0);
                        }
                        lastpunct = 1;

+               } else if (lastpunct) {
+                       c = mdoc_elem_alloc(mdoc, line, 
+                                       ppos, tok, argc, argv);
+                       if (0 == c) {
+                               mdoc_argv_free(argc, argv);
+                               return(0);
+                       }
+                       mdoc->next = MDOC_NEXT_CHILD;
+                       lastpunct = 0;

                }
                }

-               mdoc_word_alloc(mdoc, lastarg, p);
+
+               if ( ! mdoc_word_alloc(mdoc, line, la, p))
+                       return(0);

                mdoc->next = MDOC_NEXT_SIBLING;
        }
 
        mdoc_argv_free(argc, argv);
 
                mdoc->next = MDOC_NEXT_SIBLING;
        }
 
        mdoc_argv_free(argc, argv);
 

-       if (sz == MDOC_LINEARG_MAX)
-               return(mdoc_err(mdoc, tok, lastarg, ERR_ARGS_MANY));
-
-       if ( ! rewind_elem(mdoc, ppos, tok))
+       if (0 == lastpunct && ! rewind_elem(mdoc, tok))

                return(0);
        if (ppos > 1)
                return(1);
                return(0);
        if (ppos > 1)
                return(1);

-       return(append_delims(mdoc, tok, pos, buf));
+       return(append_delims(mdoc, line, pos, buf));

 }
 
 
 /*
 }
 
 
 /*

- * Multi-line-scoped macro.
+ * Handle explicit-scope (having a different closure token) and implicit
+ * scope (closing out prior scopes when re-invoked) macros.  These
+ * constitute the BLOCK type and usually span multiple lines.  These
+ * always have HEAD and sometimes have BODY types.  In the multi-line
+ * case:
+ *
+ *     .Bd -ragged
+ *     Text.
+ *     .Fl macro
+ *     Another.
+ *     .Ed
+ *
+ *     BLOCK (.Bd)
+ *         HEAD
+ *         BODY
+ *             TEXT (`Text.')
+ *             ELEMENT (.Fl)
+ *                 TEXT (`macro')
+ *             TEXT (`Another.')
+ *
+ * Note that the `.It' macro, possibly the most difficult (as it has
+ * embedded scope, etc.) is handled by this routine.

  */
  */

-int
+static int

 macro_scoped(MACRO_PROT_ARGS)
 {
 macro_scoped(MACRO_PROT_ARGS)
 {

-       int               c, lastarg, argc, j;
+       int               c, lastarg, argc;

        struct mdoc_arg   argv[MDOC_LINEARG_MAX];
        char             *p;
 
        assert ( ! (MDOC_CALLABLE & mdoc_macros[tok].flags));
 
        struct mdoc_arg   argv[MDOC_LINEARG_MAX];
        char             *p;
 
        assert ( ! (MDOC_CALLABLE & mdoc_macros[tok].flags));
 

-       if ( ! (MDOC_EXPLICIT & mdoc_macros[tok].flags)) 
-               if ( ! rewind_impblock(mdoc, ppos, tok))
+       /* First rewind extant implicit scope. */
+
+       if ( ! (MDOC_EXPLICIT & mdoc_macros[tok].flags)) {
+               if ( ! rewind_subblock(MDOC_BODY, mdoc, tok, line, ppos))

                        return(0);
                        return(0);

+               if ( ! rewind_impblock(mdoc, tok, line, ppos))
+                       return(0);
+       }

 
 

-       lastarg = ppos;
+       /* Parse arguments. */

 
        for (argc = 0; argc < MDOC_LINEARG_MAX; argc++) {
                lastarg = *pos;
 
        for (argc = 0; argc < MDOC_LINEARG_MAX; argc++) {
                lastarg = *pos;

-               c = mdoc_argv(mdoc, tok, &argv[argc], pos, buf);
-               if (ARGV_EOLN == c || ARGV_WORD == c)
+               c = mdoc_argv(mdoc, line, tok, &argv[argc], pos, buf);
+               if (ARGV_EOLN == c)

                        break;
                        break;

-               else if (ARGV_ARG == c)
+               if (ARGV_WORD == c) {
+                       *pos = lastarg;
+                       break;
+               } else if (ARGV_ARG == c)

                        continue;
                mdoc_argv_free(argc, argv);
                return(0);
        }
 
                        continue;
                mdoc_argv_free(argc, argv);
                return(0);
        }
 

-       if ( ! mdoc_valid_pre(mdoc, tok, ppos, argc, argv)) {
-               mdoc_argv_free(argc, argv);
-               return(0);
+       if (MDOC_LINEARG_MAX == argc) {
+               mdoc_argv_free(argc - 1, argv);
+               return(perr(mdoc, line, ppos, EARGVLIM));

        }
 
        }
 

-       mdoc_block_alloc(mdoc, ppos, tok, (size_t)argc, argv);
-       mdoc->next = MDOC_NEXT_CHILD;
-
+       c = mdoc_block_alloc(mdoc, line, ppos, 
+                       tok, (size_t)argc, argv);

        mdoc_argv_free(argc, argv);
 
        mdoc_argv_free(argc, argv);
 

+       if (0 == c)
+               return(0);
+
+       mdoc->next = MDOC_NEXT_CHILD;
+

        if (0 == buf[*pos]) {
        if (0 == buf[*pos]) {

-               mdoc_head_alloc(mdoc, ppos, tok);
-               if ( ! rewind_head(mdoc, ppos, tok))
+               if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
+                       return(0);
+               if ( ! rewind_subblock(MDOC_HEAD, mdoc, 
+                                       tok, line, ppos))
+                       return(0);
+               if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))

                        return(0);
                        return(0);

-               mdoc_body_alloc(mdoc, ppos, tok);

                mdoc->next = MDOC_NEXT_CHILD;
                return(1);
        }
 
                mdoc->next = MDOC_NEXT_CHILD;
                return(1);
        }
 

-       mdoc_head_alloc(mdoc, ppos, tok);
+       if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
+               return(0);

        mdoc->next = MDOC_NEXT_CHILD;
 
        mdoc->next = MDOC_NEXT_CHILD;
 

-       for (j = 0; j < MDOC_LINEARG_MAX; j++) {
+       for (;;) {

                lastarg = *pos;
                lastarg = *pos;

-               c = mdoc_args(mdoc, tok, pos, buf, ARGS_DELIM, &p);
-       
+               c = mdoc_args(mdoc, line, pos, buf, tok, &p);
+

                if (ARGS_ERROR == c)
                        return(0);
                if (ARGS_PUNCT == c)
                        break;
                if (ARGS_EOLN == c)
                        break;
                if (ARGS_ERROR == c)
                        return(0);
                if (ARGS_PUNCT == c)
                        break;
                if (ARGS_EOLN == c)
                        break;

+
+               if (ARGS_PHRASE == c) {
+                       /*
+                       if ( ! mdoc_phrase(mdoc, line, lastarg, buf))
+                               return(0);
+                       */
+                       continue;
+               }
+
+               /* FIXME: if .It -column, the lookup must be for a
+                * sub-line component.  BLAH. */

        
        

-               if (MDOC_MAX == (c = lookup(mdoc, tok, p))) {
-                       mdoc_word_alloc(mdoc, lastarg, p);
+               if (-1 == (c = lookup(mdoc, line, lastarg, tok, p)))
+                       return(0);
+
+               if (MDOC_MAX == c) {
+                       if ( ! mdoc_word_alloc(mdoc, line, lastarg, p))
+                               return(0);

                        mdoc->next = MDOC_NEXT_SIBLING;
                        continue;
                        mdoc->next = MDOC_NEXT_SIBLING;
                        continue;

-               }
+               } 

 
 

-               if ( ! mdoc_macro(mdoc, c, lastarg, pos, buf))
+               if ( ! mdoc_macro(mdoc, c, line, lastarg, pos, buf))

                        return(0);
                break;
        }
                        return(0);
                break;
        }

-
-       if (j == MDOC_LINEARG_MAX)
-               return(mdoc_err(mdoc, tok, lastarg, ERR_ARGS_MANY));
-
-       if ( ! rewind_head(mdoc, ppos, tok))
+       
+       if ( ! rewind_subblock(MDOC_HEAD, mdoc, tok, line, ppos))

                return(0);
                return(0);

-       if (1 == ppos && ! append_delims(mdoc, tok, pos, buf))
+       if (1 == ppos && ! append_delims(mdoc, line, pos, buf))

                return(0);
 
                return(0);
 

-       mdoc_body_alloc(mdoc, ppos, tok);
+       if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
+               return(0);

        mdoc->next = MDOC_NEXT_CHILD;
 
        return(1);
        mdoc->next = MDOC_NEXT_CHILD;
 
        return(1);


@@ -525,32 +967,48 @@ macro_scoped(MACRO_PROT_ARGS)
 
 
 /*
 
 
 /*

- * When scoped to a line, a macro encompasses all of the contents.  This
- * differs from constants or text macros, where a new macro will
- * terminate the existing context.
+ * This handles a case of implicitly-scoped macro (BLOCK) limited to a
+ * single line.  Instead of being closed out by a subsequent call to
+ * another macro, the scope is closed at the end of line.  These don't
+ * have BODY or TAIL types.  Notice that the punctuation falls outside
+ * of the HEAD type.
+ *
+ *     .Qq a Fl b Ar d ; ;
+ *
+ *     BLOCK (Qq)
+ *         HEAD
+ *             TEXT (`a')
+ *             ELEMENT (.Fl)
+ *                 TEXT (`b')
+ *             ELEMENT (.Ar)
+ *                 TEXT (`d')
+ *         TEXT (`;')
+ *         TEXT (`;')

  */
  */

-int
+static int

 macro_scoped_line(MACRO_PROT_ARGS)
 {
 macro_scoped_line(MACRO_PROT_ARGS)
 {

-       int               lastarg, c, j;
+       int               lastarg, c;

        char              *p;
 
        char              *p;
 

-       mdoc_block_alloc(mdoc, ppos, tok, 0, NULL);
+       if ( ! mdoc_block_alloc(mdoc, line, ppos, tok, 0, NULL))
+               return(0);

        mdoc->next = MDOC_NEXT_CHILD;
 
        mdoc->next = MDOC_NEXT_CHILD;
 

-       mdoc_head_alloc(mdoc, ppos, tok);
+       if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
+               return(0);
+       mdoc->next = MDOC_NEXT_SIBLING;
+       if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
+               return(0);

        mdoc->next = MDOC_NEXT_CHILD;
 
        /* XXX - no known argument macros. */
 
        mdoc->next = MDOC_NEXT_CHILD;
 
        /* XXX - no known argument macros. */
 

-       if ( ! mdoc_valid_pre(mdoc, tok, ppos, 0, NULL))
-               return(0);
-
-       /* Process line parameters. */
-
-       for (lastarg = ppos, j = 0; j < MDOC_LINEARG_MAX; j++) {
+       lastarg = ppos;
+       for (;;) {

                lastarg = *pos;
                lastarg = *pos;

-               c = mdoc_args(mdoc, tok, pos, buf, ARGS_DELIM, &p);
+               c = mdoc_args(mdoc, line, pos, buf, tok, &p);
+               assert(ARGS_PHRASE != c);

 
                if (ARGS_ERROR == c)
                        return(0);
 
                if (ARGS_ERROR == c)
                        return(0);


@@ -559,31 +1017,47 @@ macro_scoped_line(MACRO_PROT_ARGS)
                if (ARGS_EOLN == c)
                        break;
 
                if (ARGS_EOLN == c)
                        break;
 

-               if (MDOC_MAX == (c = lookup(mdoc, tok, p))) {
-                       mdoc_word_alloc(mdoc, lastarg, p);
+               if (-1 == (c = lookup(mdoc, line, lastarg, tok, p)))
+                       return(0);
+               else if (MDOC_MAX == c) {
+                       if ( ! mdoc_word_alloc(mdoc, line, lastarg, p))
+                               return(0);

                        mdoc->next = MDOC_NEXT_SIBLING;
                        continue;
                        mdoc->next = MDOC_NEXT_SIBLING;
                        continue;

-               }
+               } 

 
 

-               if ( ! mdoc_macro(mdoc, c, lastarg, pos, buf))
+               if ( ! mdoc_macro(mdoc, c, line, lastarg, pos, buf))

                        return(0);
                break;
        }
 
                        return(0);
                break;
        }
 

-       if (j == MDOC_LINEARG_MAX)
-               return(mdoc_err(mdoc, tok, lastarg, ERR_ARGS_MANY));
-

        if (1 == ppos) {
        if (1 == ppos) {

-               if ( ! rewind_head(mdoc, ppos, tok))
+               if ( ! rewind_subblock(MDOC_BODY, mdoc, tok, line, ppos))

                        return(0);
                        return(0);

-               if ( ! append_delims(mdoc, tok, pos, buf))
+               if ( ! append_delims(mdoc, line, pos, buf))

                        return(0);
                        return(0);

-       }
-       return(rewind_impblock(mdoc, ppos, tok));
+       } else if ( ! rewind_subblock(MDOC_BODY, mdoc, tok, line, ppos))
+               return(0);
+       return(rewind_impblock(mdoc, tok, line, ppos));

 }
 
 
 }
 
 

-int
+/*
+ * A constant-scoped macro is like a simple-scoped macro (mdoc_scoped)
+ * except that it doesn't handle implicit scopes and explicit ones have
+ * a fixed number of TEXT children to the BODY.
+ *
+ *     .Fl a So b Sc ;
+ *
+ *     ELEMENT (.Fl)
+ *         TEXT (`a')
+ *     BLOCK (.So)
+ *         HEAD
+ *         BODY
+ *             TEXT (`b')
+ *     TEXT (';')
+ */
+static int

 macro_constant_scoped(MACRO_PROT_ARGS)
 {
        int               lastarg, flushed, j, c, maxargs;
 macro_constant_scoped(MACRO_PROT_ARGS)
 {
        int               lastarg, flushed, j, c, maxargs;


@@ -601,35 +1075,38 @@ macro_constant_scoped(MACRO_PROT_ARGS)
                break;
        }
 
                break;
        }
 

-       if ( ! mdoc_valid_pre(mdoc, tok, ppos, 0, NULL))
-               return(0);
-
-       mdoc_block_alloc(mdoc, ppos, tok, 0, NULL);
+       if ( ! mdoc_block_alloc(mdoc, line, ppos, tok, 0, NULL))
+               return(0); 

        mdoc->next = MDOC_NEXT_CHILD;
 
        if (0 == maxargs) {
        mdoc->next = MDOC_NEXT_CHILD;
 
        if (0 == maxargs) {

-               mdoc_head_alloc(mdoc, ppos, tok);
-               if ( ! rewind_head(mdoc, ppos, tok))
+               if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
+                       return(0);
+               if ( ! rewind_subblock(MDOC_HEAD, mdoc, tok, line, ppos))
+                       return(0);
+               if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))

                        return(0);
                        return(0);

-               mdoc_body_alloc(mdoc, ppos, tok);

                flushed = 1;
                flushed = 1;

-       } else
-               mdoc_head_alloc(mdoc, ppos, tok);
+       } else if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
+               return(0);

 
        mdoc->next = MDOC_NEXT_CHILD;
 
 
        mdoc->next = MDOC_NEXT_CHILD;
 

-       for (j = 0; j < MDOC_LINEARG_MAX; j++) {
+       for (j = 0; /* No sentinel. */; j++) {

                lastarg = *pos;
 
                if (j == maxargs && ! flushed) {
                lastarg = *pos;
 
                if (j == maxargs && ! flushed) {

-                       if ( ! rewind_head(mdoc, ppos, tok))
+                       if ( ! rewind_subblock(MDOC_HEAD, mdoc, tok, line, ppos))

                                return(0);
                        flushed = 1;
                                return(0);
                        flushed = 1;

-                       mdoc_body_alloc(mdoc, ppos, tok);
+                       if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
+                               return(0);

                        mdoc->next = MDOC_NEXT_CHILD;
                }
 
                        mdoc->next = MDOC_NEXT_CHILD;
                }
 

-               c = mdoc_args(mdoc, tok, pos, buf, ARGS_DELIM, &p);
+               c = mdoc_args(mdoc, line, pos, buf, tok, &p);
+               assert(ARGS_PHRASE != c);
+

                if (ARGS_ERROR == c)
                        return(0);
                if (ARGS_PUNCT == c)
                if (ARGS_ERROR == c)
                        return(0);
                if (ARGS_PUNCT == c)


@@ -637,57 +1114,72 @@ macro_constant_scoped(MACRO_PROT_ARGS)
                if (ARGS_EOLN == c)
                        break;
 
                if (ARGS_EOLN == c)
                        break;
 

-               if (MDOC_MAX != (c = lookup(mdoc, tok, p))) {
+               if (-1 == (c = lookup(mdoc, line, lastarg, tok, p)))
+                       return(0);
+               else if (MDOC_MAX != c) {

                        if ( ! flushed) {
                        if ( ! flushed) {

-                               if ( ! rewind_head(mdoc, ppos, tok))
+                               if ( ! rewind_subblock(MDOC_HEAD, mdoc, 
+                                                       tok, line, ppos))

                                        return(0);
                                flushed = 1;
                                        return(0);
                                flushed = 1;

-                               mdoc_body_alloc(mdoc, ppos, tok);
+                               if ( ! mdoc_body_alloc(mdoc, line, 
+                                                       ppos, tok))
+                                       return(0);

                                mdoc->next = MDOC_NEXT_CHILD;
                        }
                                mdoc->next = MDOC_NEXT_CHILD;
                        }

-                       if ( ! mdoc_macro(mdoc, c, lastarg, pos, buf))
+                       if ( ! mdoc_macro(mdoc, c, line, lastarg, 
+                                               pos, buf))

                                return(0);
                        break;
                }
 
                if ( ! flushed && mdoc_isdelim(p)) {
                                return(0);
                        break;
                }
 
                if ( ! flushed && mdoc_isdelim(p)) {

-                       if ( ! rewind_head(mdoc, ppos, tok))
+                       if ( ! rewind_subblock(MDOC_HEAD, mdoc, 
+                                               tok, line, ppos))

                                return(0);
                        flushed = 1;
                                return(0);
                        flushed = 1;

-                       mdoc_body_alloc(mdoc, ppos, tok);
+                       if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
+                               return(0);

                        mdoc->next = MDOC_NEXT_CHILD;
                }
        
                        mdoc->next = MDOC_NEXT_CHILD;
                }
        

-               mdoc_word_alloc(mdoc, lastarg, p);
+               if ( ! mdoc_word_alloc(mdoc, line, lastarg, p))
+                       return(0);

                mdoc->next = MDOC_NEXT_SIBLING;
        }
 
                mdoc->next = MDOC_NEXT_SIBLING;
        }
 

-       if (MDOC_LINEARG_MAX == j)
-               return(mdoc_err(mdoc, tok, lastarg, ERR_ARGS_MANY));
-

        if ( ! flushed) {
        if ( ! flushed) {

-               if ( ! rewind_head(mdoc, ppos, tok))
+               if ( ! rewind_subblock(MDOC_HEAD, mdoc, tok, line, ppos))
+                       return(0);
+               if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))

                        return(0);
                        return(0);

-               mdoc_body_alloc(mdoc, ppos, tok);

                mdoc->next = MDOC_NEXT_CHILD;
        }
 
        if (ppos > 1)
                return(1);
                mdoc->next = MDOC_NEXT_CHILD;
        }
 
        if (ppos > 1)
                return(1);

-       return(append_delims(mdoc, tok, pos, buf));
+       return(append_delims(mdoc, line, pos, buf));

 }
 
 
 /*
 }
 
 
 /*

- * Delimited macros are like text macros except that, should punctuation
- * be encountered, the macro isn't re-started with remaining tokens
- * (it's only emitted once).  Delimited macros can have a maximum number
- * of arguments.
+ * A delimited constant is very similar to the macros parsed by
+ * macro_text except that, in the event of punctuation, the macro isn't
+ * "re-opened" as it is in macro_text.  Also, these macros have a fixed
+ * number of parameters.
+ *
+ *    .Fl a No b
+ *
+ *    ELEMENT (.Fl)
+ *        TEXT (`a')
+ *    ELEMENT (.No)
+ *    TEXT (`b')

  */
  */

-int
+static int

 macro_constant_delimited(MACRO_PROT_ARGS)
 {
 macro_constant_delimited(MACRO_PROT_ARGS)
 {

-       int               lastarg, flushed, j, c, maxargs, argc;
+       int               lastarg, flushed, j, c, maxargs, argc,
+                         igndelim;

        struct mdoc_arg   argv[MDOC_LINEARG_MAX];
        char             *p;
 
        struct mdoc_arg   argv[MDOC_LINEARG_MAX];
        char             *p;
 


@@ -709,37 +1201,54 @@ macro_constant_delimited(MACRO_PROT_ARGS)
                break;
        }
 
                break;
        }
 

+       switch (tok) {
+       case (MDOC_Pf):
+               igndelim = 1;
+               break;
+       default:
+               igndelim = 0;
+               break;
+       }
+

        for (argc = 0; argc < MDOC_LINEARG_MAX; argc++) {
                lastarg = *pos;
        for (argc = 0; argc < MDOC_LINEARG_MAX; argc++) {
                lastarg = *pos;

-               c = mdoc_argv(mdoc, tok, &argv[argc], pos, buf);
-               if (ARGV_EOLN == c || ARGV_WORD == c)
+               c = mdoc_argv(mdoc, line, tok, &argv[argc], pos, buf);
+               if (ARGV_EOLN == c)
+                       break;
+               if (ARGV_WORD == c) {
+                       *pos = lastarg;

                        break;
                        break;

-               else if (ARGV_ARG == c)
+               } else if (ARGV_ARG == c)

                        continue;
                mdoc_argv_free(argc, argv);
                return(0);
        }
 
                        continue;
                mdoc_argv_free(argc, argv);
                return(0);
        }
 

-       if ( ! mdoc_valid_pre(mdoc, tok, ppos, argc, argv)) {
-               mdoc_argv_free(argc, argv);
-               return(0);
+       if (MDOC_LINEARG_MAX == argc) {
+               mdoc_argv_free(argc - 1, argv);
+               return(perr(mdoc, line, ppos, EARGVLIM));

        }
 
        }
 

-       mdoc_elem_alloc(mdoc, lastarg, tok, argc, argv);
-       mdoc->next = MDOC_NEXT_CHILD;
-
+       c = mdoc_elem_alloc(mdoc, line, ppos, tok, argc, argv);

        mdoc_argv_free(argc, argv);
 
        mdoc_argv_free(argc, argv);
 

-       for (j = 0; j < MDOC_LINEARG_MAX; j++) {
+       if (0 == c)
+               return(0);
+
+       mdoc->next = MDOC_NEXT_CHILD;
+
+       for (j = 0; /* No sentinel. */; j++) {

                lastarg = *pos;
 
                if (j == maxargs && ! flushed) {
                lastarg = *pos;
 
                if (j == maxargs && ! flushed) {

-                       if ( ! rewind_elem(mdoc, ppos, tok))
+                       if ( ! rewind_elem(mdoc, tok))

                                return(0);
                        flushed = 1;
                }
 
                                return(0);
                        flushed = 1;
                }
 

-               c = mdoc_args(mdoc, tok, pos, buf, ARGS_DELIM, &p);
+               c = mdoc_args(mdoc, line, pos, buf, tok, &p);
+               assert(ARGS_PHRASE != c);
+

                if (ARGS_ERROR == c)
                        return(0);
                if (ARGS_PUNCT == c)
                if (ARGS_ERROR == c)
                        return(0);
                if (ARGS_PUNCT == c)


@@ -747,112 +1256,142 @@ macro_constant_delimited(MACRO_PROT_ARGS)
                if (ARGS_EOLN == c)
                        break;
 
                if (ARGS_EOLN == c)
                        break;
 

-               if (MDOC_MAX != (c = lookup(mdoc, tok, p))) {
-                       if ( ! flushed && ! rewind_elem(mdoc, ppos, tok))
+               if (-1 == (c = lookup(mdoc, line, lastarg, tok, p)))
+                       return(0);
+               else if (MDOC_MAX != c) {
+                       if ( ! flushed && ! rewind_elem(mdoc, tok))

                                return(0);
                        flushed = 1;
                                return(0);
                        flushed = 1;

-                       if ( ! mdoc_macro(mdoc, c, lastarg, pos, buf))
+                       if ( ! mdoc_macro(mdoc, c, line, lastarg, pos, buf))

                                return(0);
                        break;
                }
 
                                return(0);
                        break;
                }
 

-               if ( ! flushed && mdoc_isdelim(p)) {
-                       if ( ! rewind_elem(mdoc, ppos, tok))
+               if ( ! flushed && mdoc_isdelim(p) && ! igndelim) {
+                       if ( ! rewind_elem(mdoc, tok))

                                return(0);
                        flushed = 1;
                }
        
                                return(0);
                        flushed = 1;
                }
        

-               mdoc_word_alloc(mdoc, lastarg, p);
+               if ( ! mdoc_word_alloc(mdoc, line, lastarg, p))
+                       return(0);

                mdoc->next = MDOC_NEXT_SIBLING;
        }
 
                mdoc->next = MDOC_NEXT_SIBLING;
        }
 

-       if (MDOC_LINEARG_MAX == j)
-               return(mdoc_err(mdoc, tok, lastarg, ERR_ARGS_MANY));
-
-       if ( ! flushed && rewind_elem(mdoc, ppos, tok))
+       if ( ! flushed && ! rewind_elem(mdoc, tok))

                return(0);
 
        if (ppos > 1)
                return(1);
                return(0);
 
        if (ppos > 1)
                return(1);

-       return(append_delims(mdoc, tok, pos, buf));
+       return(append_delims(mdoc, line, pos, buf));

 }
 
 
 /*
 }
 
 
 /*

- * Constant macros span an entire line:  they constitute a macro and all
- * of its arguments and child data.
+ * A constant macro is the simplest classification.  It spans an entire
+ * line.  

  */
  */

-int
+static int

 macro_constant(MACRO_PROT_ARGS)
 {
 macro_constant(MACRO_PROT_ARGS)
 {

-       int              c, lastarg, argc, sz, fl;
-       struct mdoc_arg  argv[MDOC_LINEARG_MAX];
-       char            *p;
-
-       /*assert( ! (MDOC_PARSED & mdoc_macros[tok].flags));*/
-       /*FIXME*/
+       int               c, w, la, argc;
+       struct mdoc_arg   argv[MDOC_LINEARG_MAX];
+       char             *p;

 
 

-       fl = 0;
-       if (MDOC_QUOTABLE & mdoc_macros[tok].flags)
-               fl = ARGS_QUOTED;
+       assert( ! (MDOC_CALLABLE & mdoc_macros[tok].flags));

 
        for (argc = 0; argc < MDOC_LINEARG_MAX; argc++) {
 
        for (argc = 0; argc < MDOC_LINEARG_MAX; argc++) {

-               lastarg = *pos;
-               c = mdoc_argv(mdoc, tok, &argv[argc], pos, buf);
+               la = *pos;
+               c = mdoc_argv(mdoc, line, tok, &argv[argc], pos, buf);

                if (ARGV_EOLN == c) 
                        break;
                if (ARGV_EOLN == c) 
                        break;

-               else if (ARGV_ARG == c)
-                       continue;
-               else if (ARGV_WORD == c)
+               if (ARGV_WORD == c) {
+                       *pos = la;

                        break;
                        break;

+               } else if (ARGV_ARG == c)
+                       continue;

 
                mdoc_argv_free(argc, argv);
                return(0);
        }
 
        if (MDOC_LINEARG_MAX == argc) {
 
                mdoc_argv_free(argc, argv);
                return(0);
        }
 
        if (MDOC_LINEARG_MAX == argc) {

-               mdoc_argv_free(argc, argv);
-               return(mdoc_err(mdoc, tok, lastarg, ERR_ARGS_MANY));
+               mdoc_argv_free(argc - 1, argv);
+               return(perr(mdoc, line, ppos, EARGVLIM));

        }
 
        }
 

-       mdoc_elem_alloc(mdoc, ppos, tok, argc, argv);
+       c = mdoc_elem_alloc(mdoc, line, ppos, tok, argc, argv);
+       mdoc_argv_free(argc, argv);
+
+       if (0 == c)
+               return(0);
+

        mdoc->next = MDOC_NEXT_CHILD;
 
        mdoc->next = MDOC_NEXT_CHILD;
 

-       mdoc_argv_free(argc, argv);
+       for (;;) {
+               la = *pos;
+               w = mdoc_args(mdoc, line, pos, buf, tok, &p);
+               assert(ARGS_PHRASE != c);

 
 

-       for (sz = 0; sz + argc < MDOC_LINEARG_MAX; sz++) {
-               lastarg = *pos;
-               c = mdoc_args(mdoc, tok, pos, buf, fl, &p);
-               if (ARGS_ERROR == c)
+               if (ARGS_ERROR == w)

                        return(0);
                        return(0);

-               if (ARGS_EOLN == c)
+               if (ARGS_EOLN == w)

                        break;
 
                        break;
 

-               mdoc_word_alloc(mdoc, lastarg, p);
+               c = ARGS_QWORD == w ? MDOC_MAX :
+                       lookup(mdoc, line, la, tok, p);
+
+               if (MDOC_MAX != c && -1 != c) {
+                       if ( ! rewind_elem(mdoc, tok))
+                               return(0);
+                       return(mdoc_macro(mdoc, c, line, la, pos, buf));
+               } else if (-1 == c)
+                       return(0);
+
+               if ( ! mdoc_word_alloc(mdoc, line, la, p))
+                       return(0);

                mdoc->next = MDOC_NEXT_SIBLING;
        }
 
                mdoc->next = MDOC_NEXT_SIBLING;
        }
 

-       if (MDOC_LINEARG_MAX == sz + argc)
-               return(mdoc_err(mdoc, tok, lastarg, ERR_ARGS_MANY));
-
-       return(rewind_elem(mdoc, ppos, tok));
+       return(rewind_elem(mdoc, tok));

 }
 
 
 /* ARGSUSED */
 }
 
 
 /* ARGSUSED */

-int
+static int

 macro_obsolete(MACRO_PROT_ARGS)
 {
 
 macro_obsolete(MACRO_PROT_ARGS)
 {
 

-       return(mdoc_warn(mdoc, tok, ppos, WARN_IGN_OBSOLETE));
+       return(pwarn(mdoc, line, ppos, WOBS));

 }
 
 
 }
 
 

+/*
+ * This is called at the end of parsing.  It must traverse up the tree,
+ * closing out open [implicit] scopes.  Obviously, open explicit scopes
+ * are errors.
+ */

 int
 macro_end(struct mdoc *mdoc)
 {
 int
 macro_end(struct mdoc *mdoc)
 {

+       struct mdoc_node *n;

 
        assert(mdoc->first);
        assert(mdoc->last);
 
        assert(mdoc->first);
        assert(mdoc->last);

-       return(rewind_last(mdoc, -1, mdoc->first));
+
+       /* Scan for open explicit scopes. */
+
+       n = MDOC_VALID & mdoc->last->flags ?
+               mdoc->last->parent : mdoc->last;
+
+       for ( ; n; n = n->parent) {
+               if (MDOC_BLOCK != n->type)
+                       continue;
+               if ( ! (MDOC_EXPLICIT & mdoc_macros[n->tok].flags))
+                       continue;
+               return(mdoc_nerr(mdoc, n, 
+                               "macro scope still open on exit"));
+       }
+
+       return(rewind_last(mdoc, mdoc->first));

 }
 }