more F move (trunk only)

Using F prefix when trying to move into a wall or closed door yielded
"you attack thin air".  Like the recently fixed F-vs-boulder case, give
more appropriate feedback.  Also like F-vs-boulder, initiate digging if
wielding a pick-axe.  (Also handles axes versus trees and closed doors).

     One thing which isn't handled but possibly should be:  F vs closed
door when not wielding a pick or other axe might attempt to force the door.
(Right now it gives "you harmlessly attack the door".)

doc/fixes35.0

@@ -370,7 +370,7 @@ C and #name commands are now same and use menu to choose monster vs object
 hallucination provides partial protection against gaze attacks
 attempting to read "dull" spellbook might cause hero to fall asleep
 dipping prompt is more precise
-using F to attack boulder or statue while wielding pick digs/breaks target
+using F to attack wall/boulder/statue while wielding pick digs/breaks target
 
 
 Platform- and/or Interface-Specific New Features

include/extern.h

@@ -259,6 +259,7 @@ E void NDECL(sokoban_detect);
 
 /* ### dig.c ### */
 
+E int FDECL(dig_typ, (struct obj *,XCHAR_P,XCHAR_P));
 E boolean NDECL(is_digging);
 #ifdef USE_TRAMPOLI
 E int NDECL(dig);

src/dig.c

@@ -11,7 +11,6 @@ static NEARDATA boolean did_dig_msg;
 STATIC_DCL boolean NDECL(rm_waslit);
 STATIC_DCL void FDECL(mkcavepos, (XCHAR_P,XCHAR_P,int,BOOLEAN_P,BOOLEAN_P));
 STATIC_DCL void FDECL(mkcavearea, (BOOLEAN_P));
-STATIC_DCL int FDECL(dig_typ, (struct obj *,XCHAR_P,XCHAR_P));
 STATIC_DCL int NDECL(dig);
 STATIC_DCL void FDECL(dig_up_grave, (coord *));
 STATIC_DCL int FDECL(adj_pit_checks, (coord *,char *));
@@ -129,12 +128,16 @@ register boolean rockit;
 }
 
 /* When digging into location <x,y>, what are you actually digging into? */
-STATIC_OVL int
+int
 dig_typ(otmp, x, y)
 struct obj *otmp;
 xchar x, y;
 {
-	boolean ispick = is_pick(otmp);
+	boolean ispick;
+
+	if (!otmp) return DIGTYP_UNDIGGABLE;
+	ispick = is_pick(otmp);
+	if (!ispick && !is_axe(otmp)) return DIGTYP_UNDIGGABLE;
 
 	return (ispick && sobj_at(STATUE, x, y) ? DIGTYP_STATUE :
 		ispick && sobj_at(BOULDER, x, y) ? DIGTYP_BOULDER :

src/hack.c

@@ -1204,7 +1204,8 @@ domove()
 	    /* remembered an 'I' && didn't use a move command */
 	    (glyph_is_invisible(levl[x][y].glyph) && !context.nopick)) {
 		struct obj *boulder = sobj_at(BOULDER, x, y);
-		boolean explo = (Upolyd && attacktype(youmonst.data, AT_EXPL));
+		boolean explo = (Upolyd && attacktype(youmonst.data, AT_EXPL)),
+			solid = !accessible(x, y);
 		int glyph = glyph_at(x, y);	/* might be monster */
 		char buf[BUFSZ];
 
@@ -1215,15 +1216,22 @@ domove()
 			(Hallucination && glyph_is_monster(glyph)))
 		    boulder = sobj_at(STATUE, x, y);
 
-		/* force fight at boulder (or statue) while wielding pick:
+		/* force fight at boulder/statue or wall/door while wielding
-		   start digging to break the boulder (or statue) */
+		   pick:  start digging to break the boulder or wall */
-		if (boulder && context.forcefight && uwep && is_pick(uwep)) {
+		if (context.forcefight &&
+			/* can we dig? */
+			uwep && dig_typ(uwep, x, y) &&
+			/* should we dig? */
+			!glyph_is_invisible(glyph) &&
+			!glyph_is_monster(glyph)) {
 		    (void)use_pick_axe2(uwep);
 		    return;
 		}
 
 		if (boulder)
 		    Strcpy(buf, ansimpleoname(boulder));
+		else if (solid)
+		    Strcpy(buf, the(defsyms[glyph_to_cmap(glyph)].explanation));
 		else if (!Underwater)
 		    Strcpy(buf, "thin air");
 		else if (is_pool(x, y))
@@ -1231,7 +1239,8 @@ domove()
 		else	/* Underwater, targetting non-water */
 		    Sprintf(buf, "a vacant spot on the %s", surface(x,y));
 		You("%s%s %s.",
-		    !boulder ? "" : !explo ? "harmlessly " : "futilely ",
+		    !(boulder || solid) ? "" :
+			!explo ? "harmlessly " : "futilely ",
 		    explo ? "explode at" : "attack",
 		    buf);
 		unmap_object(x, y); /* known empty -- remove 'I' if present */