[gforth] / gforth / kernel / cond.fs  

gforth: gforth/kernel/cond.fs

Diff for /gforth/kernel/cond.fs between version 1.7 and 1.15

version 1.7, Fri Dec 3 18:49:51 1999 UTC version 1.15, Sun Jan 19 23:35:34 2003 UTC
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 \ Structural Conditionals                              12dec92py  \ Structural Conditionals                              12dec92py
   
 \ Copyright (C) 1995,1996,1997 Free Software Foundation, Inc.  \ Copyright (C) 1995-2003 Free Software Foundation, Inc.
   
 \ This file is part of Gforth.  \ This file is part of Gforth.
   
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 \ You should have received a copy of the GNU General Public License  \ You should have received a copy of the GNU General Public License
 \ along with this program; if not, write to the Free Software  \ along with this program; if not, write to the Free Software
 \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
   
 here 0 , \ just a dummy, the real value of locals-list is patched into it in glocals.fs  here 0 , \ just a dummy, the real value of locals-list is patched into it in glocals.fs
 AConstant locals-list \ acts like a variable that contains  AConstant locals-list \ acts like a variable that contains
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 : sys?        ( sys -- )        dup 0= ?struc ;  : sys?        ( sys -- )        dup 0= ?struc ;
 : >mark ( -- orig )  : >mark ( -- orig )
  cs-push-orig 0 , ;   cs-push-orig 0 , ;
 : >resolve    ( addr -- )        here over - swap ! ;  : >resolve    ( addr -- )
 : <resolve    ( addr -- )        here - , ;      here swap !
       basic-block-end ;
   : <resolve    ( addr -- )        , ;
   
 : BUT  : BUT
     1 cs-roll ;                      immediate restrict      1 cs-roll ;                      immediate restrict
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 ' noop IS begin-like  ' noop IS begin-like
   
 : BEGIN ( compilation -- dest ; run-time -- ) \ core  : BEGIN ( compilation -- dest ; run-time -- ) \ core
     begin-like cs-push-part dest ; immediate restrict      begin-like cs-push-part dest
       basic-block-end ; immediate restrict
   
 Defer again-like ( dest -- addr )  Defer again-like ( dest -- addr )
 ' nip IS again-like  ' nip IS again-like
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 : AGAIN ( compilation dest -- ; run-time -- ) \ core-ext  : AGAIN ( compilation dest -- ; run-time -- ) \ core-ext
     dest? again-like  POSTPONE branch  <resolve ; immediate restrict      dest? again-like  POSTPONE branch  <resolve ; immediate restrict
   
 Defer until-like  Defer until-like ( list addr xt1 xt2 -- )
 : until, ( list addr xt1 xt2 -- )  drop compile, <resolve drop ;  :noname ( list addr xt1 xt2 -- )
 ' until, IS until-like      drop compile, <resolve drop ;
   IS until-like
   
 : UNTIL ( compilation dest -- ; run-time f -- ) \ core  : UNTIL ( compilation dest -- ; run-time f -- ) \ core
     dest? ['] ?branch ['] ?branch-lp+!# until-like ; immediate restrict      dest? ['] ?branch ['] ?branch-lp+!# until-like ; immediate restrict
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     \G @code{UNLOOP} any outstanding @code{?DO}...@code{LOOP}s.      \G @code{UNLOOP} any outstanding @code{?DO}...@code{LOOP}s.
     exit-like      exit-like
     POSTPONE ;s      POSTPONE ;s
       basic-block-end
     POSTPONE unreachable ; immediate restrict      POSTPONE unreachable ; immediate restrict
   
 : ?EXIT ( -- ) ( compilation -- ; run-time nest-sys f -- | nest-sys ) \ gforth  : ?EXIT ( -- ) ( compilation -- ; run-time nest-sys f -- | nest-sys ) \ gforth

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