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- /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
-
- /*
- $Header: b2tar.c,v 1.4 85/08/22 16:56:49 timo Exp $
- */
-
- #include "b.h"
- #include "b1obj.h"
- #include "b2par.h"
- #include "b2syn.h"
- #include "b2nod.h"
- #include "b3err.h"
-
- Forward parsetree singtarg();
-
- Visible parsetree targ(q) txptr q; {
- return collateral(q, singtarg);
- }
-
- Hidden parsetree singtarg(q) txptr q; {
- parsetree v; value t;
- skipsp(&tx);
- if (nothing(q, "target")) return NilTree;
- if (open_sign()) v= compound(q, targ);
- else if (is_tag(&t)) v= node2(TAG, t);
- else {
- parerr(MESS(2500, "no target where expected"));
- tx= q;
- return NilTree;
- }
- selection(q, &v);
- tar_trimmed_text(q, &v);
- upto(q, "target");
- return v;
- }
-