--- gforth/extend.fs	1997/02/06 21:23:00	1.20
+++ gforth/extend.fs	1997/07/06 15:55:23	1.27
@@ -30,8 +30,6 @@ decimal
 
 \ VALUE 2>R 2R> 2R@                                     17may93jaw
 
-: value ( w "name" -- ) \ core-ext
-  (constant) , ;
 \ !! 2value
 
 : 2Literal ( compilation w1 w2 -- ; run-time  -- w1 w2 ) \ double two-literal
@@ -75,26 +73,16 @@ decimal
 : C" ( compilation "...<quote>" -- ; run-time  -- c-addr ) \ core-ext c-quote
     [char] " parse postpone CLiteral ; immediate restrict
 
-\ UNUSED                                                17may93jaw
-
-: unused ( -- u ) \ core-ext
-    forthstart dup 3 cells + @ + here - ;
-
 \ [COMPILE]                                             17may93jaw
 
 : [compile] ( compilation "name" -- ; run-time ? -- ? ) \ core-ext bracket-compile
-    ' compile, ; immediate
-
-\ MARKER                                                17may93jaw
-
-\ : marker here last @ create , , DOES> dup @ last ! cell+ @ dp ! ;
-\ doesn't work now. vocabularies?
+    comp' drop compile, ; immediate
 
 \ CONVERT                                               17may93jaw
 
 : convert ( ud1 c-addr1 -- ud2 c-addr2 ) \ core-ext
-    \ obsolescent; superseded by @code{>number}.
-    true >number drop ;
+    \G obsolescent; superseded by @code{>number}.
+    char+ true >number drop ;
 
 \ ERASE                                                 17may93jaw
 
@@ -123,7 +111,7 @@ decimal
 
 \ SOURCE-ID SAVE-INPUT RESTORE-INPUT                    11jun93jaw
 
-: source-id ( -- 0 | -1 | fileid ) \ core-ext source-i-d
+: source-id ( -- 0 | -1 | fileid ) \ core-ext,file source-i-d
   loadfile @ dup 0= IF  drop sourceline# 0 min  THEN ;
 
 : save-input ( -- x1 .. xn n ) \ core-ext
@@ -177,3 +165,37 @@ variable span ( -- a-addr ) \ core-ext
     2 pick swap /string type
     nip span ! ;
 
+\ marker                                               18dec94py
+
+\ Marker creates a mark that is removed (including everything 
+\ defined afterwards) when executing the mark.
+
+: marker, ( -- mark )  here dup A,
+  voclink @ A, voclink
+  BEGIN  @ dup WHILE  dup 0 wordlist-link - @ A,  REPEAT  drop
+  udp @ , ;
+
+: marker! ( mark -- )
+    dup @ swap cell+
+    dup @ voclink ! cell+
+    voclink
+    BEGIN
+	@ dup 
+    WHILE
+	over @ over 0 wordlist-link - !
+	swap cell+ swap
+    REPEAT
+    drop  voclink
+    BEGIN
+	@ dup
+    WHILE
+	dup 0 wordlist-link - rehash
+    REPEAT
+    drop
+    @ udp !  dp ! ;
+
+: marker ( "mark" -- )
+    marker, Create A,
+DOES> ( -- )
+    @ marker! ;
+