Annotation of gforth/kernel/comp.fs, revision 1.22

1.1       pazsan      1: \ compiler definitions                                         14sep97jaw
                      2: 
1.6       anton       3: \ Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
                      4: 
                      5: \ This file is part of Gforth.
                      6: 
                      7: \ Gforth is free software; you can redistribute it and/or
                      8: \ modify it under the terms of the GNU General Public License
                      9: \ as published by the Free Software Foundation; either version 2
                     10: \ of the License, or (at your option) any later version.
                     11: 
                     12: \ This program is distributed in the hope that it will be useful,
                     13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
                     14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     15: \ GNU General Public License for more details.
                     16: 
                     17: \ You should have received a copy of the GNU General Public License
                     18: \ along with this program; if not, write to the Free Software
                     19: \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
                     20: 
1.1       pazsan     21: \ \ Revisions-Log
                     22: 
                     23: \      put in seperate file                            14sep97jaw      
                     24: 
                     25: \ \ here allot , c, A,                                         17dec92py
                     26: 
1.14      jwilke     27: [IFUNDEF] allot
                     28: [IFUNDEF] forthstart
                     29: : allot ( n -- ) \ core
                     30:     dup unused u> -8 and throw
                     31:     dp +! ;
                     32: [THEN]
                     33: [THEN]
                     34: 
                     35: \ we default to this version if we have nothing else 05May99jaw
                     36: [IFUNDEF] allot
1.1       pazsan     37: : allot ( n -- ) \ core
1.17      anton      38:     \G Reserve or release @i{n} address units of data space without
                     39:     \G initialization; @i{n} is a signed number.  In ANS Forth you can
                     40:     \G only deallocate memory from the current contiguous region in
                     41:     \G this way.  In Gforth you can deallocate anything in this way
                     42:     \G but named words.  The system does not check this restriction.
1.12      anton      43:     here +
                     44:     dup 1- usable-dictionary-end forthstart within -8 and throw
                     45:     dp ! ;
1.14      jwilke     46: [THEN]
1.1       pazsan     47: 
1.22    ! crook      48: : c,    ( c -- ) \ core c-comma
1.15      crook      49:     \G Reserve data space for one char and store @i{c} in the space.
1.1       pazsan     50:     here 1 chars allot c! ;
                     51: 
1.22    ! crook      52: : ,     ( w -- ) \ core comma
1.15      crook      53:     \G Reserve data space for one cell and store @i{w} in the space.
1.1       pazsan     54:     here cell allot  ! ;
                     55: 
                     56: : 2,   ( w1 w2 -- ) \ gforth
1.15      crook      57:     \G Reserve data space for two cells and store the double @i{w1
1.11      crook      58:     \G w2} in the space.
1.1       pazsan     59:     here 2 cells allot 2! ;
                     60: 
                     61: \ : aligned ( addr -- addr' ) \ core
                     62: \     [ cell 1- ] Literal + [ -1 cells ] Literal and ;
                     63: 
                     64: : align ( -- ) \ core
1.15      crook      65:     \G If the data-space pointer is not aligned, reserve enough space to align it.
1.1       pazsan     66:     here dup aligned swap ?DO  bl c,  LOOP ;
                     67: 
1.22    ! crook      68: \ : faligned ( addr -- f-addr ) \ float f-aligned
1.1       pazsan     69: \     [ 1 floats 1- ] Literal + [ -1 floats ] Literal and ; 
                     70: 
1.22    ! crook      71: : falign ( -- ) \ float f-align
1.15      crook      72:     \G If the data-space pointer is not float-aligned, reserve
                     73:     \G enough space to align it.
1.1       pazsan     74:     here dup faligned swap
                     75:     ?DO
                     76:        bl c,
                     77:     LOOP ;
                     78: 
1.9       anton      79: : maxalign ( -- ) \ gforth
1.1       pazsan     80:     here dup maxaligned swap
                     81:     ?DO
                     82:        bl c,
                     83:     LOOP ;
                     84: 
                     85: \ the code field is aligned if its body is maxaligned
                     86: ' maxalign Alias cfalign ( -- ) \ gforth
                     87: 
                     88: ' , alias A, ( addr -- ) \ gforth
                     89: 
                     90: ' NOOP ALIAS const
                     91: 
                     92: \ \ Header                                                     23feb93py
                     93: 
                     94: \ input-stream, nextname and noname are quite ugly (passing
                     95: \ information through global variables), but they are useful for dealing
                     96: \ with existing/independent defining words
                     97: 
                     98: defer (header)
                     99: defer header ( -- ) \ gforth
                    100: ' (header) IS header
                    101: 
                    102: : string, ( c-addr u -- ) \ gforth
                    103:     \G puts down string as cstring
                    104:     dup c, here swap chars dup allot move ;
                    105: 
                    106: : header, ( c-addr u -- ) \ gforth
                    107:     name-too-long?
                    108:     align here last !
                    109:     current @ 1 or A,  \ link field; before revealing, it contains the
                    110:                        \ tagged reveal-into wordlist
                    111:     string, cfalign
                    112:     alias-mask lastflags cset ;
                    113: 
                    114: : input-stream-header ( "name" -- )
                    115:     name name-too-short? header, ;
                    116: 
                    117: : input-stream ( -- )  \ general
                    118:     \G switches back to getting the name from the input stream ;
                    119:     ['] input-stream-header IS (header) ;
                    120: 
                    121: ' input-stream-header IS (header)
                    122: 
                    123: \ !! make that a 2variable
                    124: create nextname-buffer 32 chars allot
                    125: 
                    126: : nextname-header ( -- )
                    127:     nextname-buffer count header,
                    128:     input-stream ;
                    129: 
                    130: \ the next name is given in the string
                    131: 
                    132: : nextname ( c-addr u -- ) \ gforth
1.19      anton     133:     \g The next defined word will have the name @var{c-addr u}; the
                    134:     \g defining word will leave the input stream alone.
1.1       pazsan    135:     name-too-long?
                    136:     nextname-buffer c! ( c-addr )
                    137:     nextname-buffer count move
                    138:     ['] nextname-header IS (header) ;
                    139: 
                    140: : noname-header ( -- )
                    141:     0 last ! cfalign
                    142:     input-stream ;
                    143: 
                    144: : noname ( -- ) \ gforth
1.19      anton     145:     \g The next defined word will be anonymous. The defining word will
                    146:     \g leave the input stream alone. The xt of the defined word will
                    147:     \g be given by @code{lastxt}.
1.1       pazsan    148:     ['] noname-header IS (header) ;
                    149: 
                    150: : lastxt ( -- xt ) \ gforth
1.15      crook     151:     \G @i{xt} is the execution token of the last word defined.
1.13      crook     152:     \ The main purpose of this word is to get the xt of words defined using noname
1.1       pazsan    153:     lastcfa @ ;
                    154: 
                    155: \ \ literals                                                   17dec92py
                    156: 
                    157: : Literal  ( compilation n -- ; run-time -- n ) \ core
1.15      crook     158:     \G Compile appropriate code such that, at run-time, @i{n} is placed
1.8       crook     159:     \G on the stack. Interpretation semantics are undefined.
1.14      jwilke    160: [ [IFDEF] lit, ]
                    161:     lit,
                    162: [ [ELSE] ]
                    163:     postpone lit , 
                    164: [ [THEN] ] ; immediate restrict
1.1       pazsan    165: 
                    166: : ALiteral ( compilation addr -- ; run-time -- addr ) \ gforth
1.14      jwilke    167: [ [IFDEF] alit, ]
                    168:     alit,
                    169: [ [ELSE] ]
                    170:     postpone lit A, 
                    171: [ [THEN] ] ; immediate restrict
1.1       pazsan    172: 
1.8       crook     173: : char   ( '<spaces>ccc' -- c ) \ core
1.15      crook     174:     \G Skip leading spaces. Parse the string @i{ccc} and return @i{c}, the
                    175:     \G display code representing the first character of @i{ccc}.
1.1       pazsan    176:     bl word char+ c@ ;
                    177: 
1.8       crook     178: : [char] ( compilation '<spaces>ccc' -- ; run-time -- c ) \ core bracket-char
1.10      crook     179:     \G Compilation: skip leading spaces. Parse the string
1.15      crook     180:     \G @i{ccc}. Run-time: return @i{c}, the display code
                    181:     \G representing the first character of @i{ccc}.  Interpretation
1.10      crook     182:     \G semantics for this word are undefined.
1.1       pazsan    183:     char postpone Literal ; immediate restrict
                    184: 
                    185: \ \ threading                                                  17mar93py
                    186: 
                    187: : cfa,     ( code-address -- )  \ gforth       cfa-comma
                    188:     here
                    189:     dup lastcfa !
                    190:     0 A, 0 ,  code-address! ;
                    191: 
1.14      jwilke    192: [IFUNDEF] compile,
1.1       pazsan    193: : compile, ( xt -- )   \ core-ext      compile-comma
1.15      crook     194:     \G  Compile the word represented by the execution token, @i{xt},
                    195:     \G  into the current definition.
1.1       pazsan    196:     A, ;
1.14      jwilke    197: [THEN]
1.1       pazsan    198: 
                    199: : !does    ( addr -- ) \ gforth        store-does
                    200:     lastxt does-code! ;
                    201: 
                    202: : (does>)  ( R: addr -- )
                    203:     r> cfaligned /does-handler + !does ;
                    204: 
                    205: : dodoes,  ( -- )
                    206:   cfalign here /does-handler allot does-handler! ;
                    207: 
                    208: : (compile) ( -- ) \ gforth
                    209:     r> dup cell+ >r @ compile, ;
                    210: 
                    211: \ \ ticks
                    212: 
                    213: : name>comp ( nt -- w xt ) \ gforth
1.15      crook     214:     \G @i{w xt} is the compilation token for the word @i{nt}.
1.1       pazsan    215:     (name>comp)
                    216:     1 = if
                    217:         ['] execute
                    218:     else
                    219:         ['] compile,
                    220:     then ;
                    221: 
                    222: : [(')]  ( compilation "name" -- ; run-time -- nt ) \ gforth bracket-paren-tick
                    223:     (') postpone ALiteral ; immediate restrict
                    224: 
                    225: : [']  ( compilation. "name" -- ; run-time. -- xt ) \ core      bracket-tick
1.15      crook     226:     \g @i{xt} represents @i{name}'s interpretation
                    227:     \g semantics. Perform @code{-14 throw} if the word has no
1.1       pazsan    228:     \g interpretation semantics.
                    229:     ' postpone ALiteral ; immediate restrict
                    230: 
1.5       anton     231: : COMP'    ( "name" -- w xt ) \ gforth  comp-tick
1.15      crook     232:     \g Compilation token @i{w xt} represents @i{name}'s compilation semantics.
1.1       pazsan    233:     (') name>comp ;
                    234: 
                    235: : [COMP']  ( compilation "name" -- ; run-time -- w xt ) \ gforth bracket-comp-tick
1.15      crook     236:     \g Compilation token @i{w xt} represents @i{name}'s compilation semantics.
1.1       pazsan    237:     COMP' swap POSTPONE Aliteral POSTPONE ALiteral ; immediate restrict
                    238: 
1.18      jwilke    239: : postpone, ( w xt -- ) \ gforth       postpone-comma
                    240:     \g Compile the compilation semantics represented by @i{w xt}.
                    241:     dup ['] execute =
                    242:     if
                    243:        drop compile,
                    244:     else
                    245:        dup ['] compile, =
                    246:        if
                    247:            drop POSTPONE (compile) a,
                    248:        else
                    249:            swap POSTPONE aliteral compile,
                    250:        then
                    251:     then ;
                    252: 
                    253: : POSTPONE ( "name" -- ) \ core
                    254:     \g Compiles the compilation semantics of @i{name}.
                    255:     COMP' postpone, ; immediate restrict
                    256: 
1.1       pazsan    257: \ \ recurse                                                    17may93jaw
                    258: 
                    259: : recurse ( compilation -- ; run-time ?? -- ?? ) \ core
1.10      crook     260:     \g Call the current definition.
1.1       pazsan    261:     lastxt compile, ; immediate restrict
                    262: 
                    263: \ \ compiler loop
                    264: 
                    265: : compiler ( c-addr u -- )
                    266:     2dup find-name dup
                    267:     if ( c-addr u nt )
                    268:        nip nip name>comp execute
                    269:     else
                    270:        drop
                    271:        2dup snumber? dup
                    272:        IF
                    273:            0>
                    274:            IF
                    275:                swap postpone Literal
                    276:            THEN
                    277:            postpone Literal
                    278:            2drop
                    279:        ELSE
                    280:            drop compiler-notfound
                    281:        THEN
                    282:     then ;
                    283: 
1.22    ! crook     284: : [ ( -- ) \  core     left-bracket
1.8       crook     285:     \G Enter interpretation state. Immediate word.
1.1       pazsan    286:     ['] interpreter  IS parser state off ; immediate
                    287: 
                    288: : ] ( -- ) \ core      right-bracket
1.8       crook     289:     \G Enter compilation state.
1.1       pazsan    290:     ['] compiler     IS parser state on  ;
                    291: 
                    292: \ \ Strings                                                    22feb93py
                    293: 
                    294: : ," ( "string"<"> -- ) [char] " parse
                    295:   here over char+ allot  place align ;
                    296: 
                    297: : SLiteral ( Compilation c-addr1 u ; run-time -- c-addr2 u ) \ string
1.15      crook     298:     \G Compilation: compile the string specified by @i{c-addr1},
                    299:     \G @i{u} into the current definition. Run-time: return
                    300:     \G @i{c-addr2 u} describing the address and length of the
1.10      crook     301:     \G string.
1.1       pazsan    302:     postpone (S") here over char+ allot  place align ;
                    303:                                              immediate restrict
                    304: 
                    305: \ \ abort"                                                     22feb93py
                    306: 
                    307: : abort" ( compilation 'ccc"' -- ; run-time f -- ) \ core,exception-ext        abort-quote
1.15      crook     308:     \G If any bit of @i{f} is non-zero, perform the function of @code{-2 throw},
                    309:     \G displaying the string @i{ccc} if there is no exception frame on the
1.10      crook     310:     \G exception stack.
1.1       pazsan    311:     postpone (abort") ," ;        immediate restrict
                    312: 
                    313: \ \ Header states                                              23feb93py
                    314: 
                    315: : cset ( bmask c-addr -- )
                    316:     tuck c@ or swap c! ; 
                    317: 
                    318: : creset ( bmask c-addr -- )
                    319:     tuck c@ swap invert and swap c! ; 
                    320: 
                    321: : ctoggle ( bmask c-addr -- )
                    322:     tuck c@ xor swap c! ; 
                    323: 
                    324: : lastflags ( -- c-addr )
                    325:     \ the address of the flags byte in the last header
                    326:     \ aborts if the last defined word was headerless
                    327:     last @ dup 0= abort" last word was headerless" cell+ ;
                    328: 
                    329: : immediate ( -- ) \ core
1.10      crook     330:     \G Make the compilation semantics of a word be to @code{execute}
                    331:     \G the execution semantics.
1.1       pazsan    332:     immediate-mask lastflags cset ;
                    333: 
                    334: : restrict ( -- ) \ gforth
1.10      crook     335:     \G A synonym for @code{compile-only}
1.1       pazsan    336:     restrict-mask lastflags cset ;
1.18      jwilke    337: 
1.1       pazsan    338: ' restrict alias compile-only ( -- ) \ gforth
1.10      crook     339: \G Remove the interpretation semantics of a word.
1.1       pazsan    340: 
                    341: \ \ Create Variable User Constant                              17mar93py
                    342: 
1.15      crook     343: : Alias    ( xt "name" -- ) \ gforth
1.1       pazsan    344:     Header reveal
                    345:     alias-mask lastflags creset
                    346:     dup A, lastcfa ! ;
                    347: 
                    348: doer? :dovar [IF]
                    349: 
                    350: : Create ( "name" -- ) \ core
                    351:     Header reveal dovar: cfa, ;
                    352: [ELSE]
                    353: 
                    354: : Create ( "name" -- ) \ core
                    355:     Header reveal here lastcfa ! 0 A, 0 , DOES> ;
                    356: [THEN]
                    357: 
                    358: : Variable ( "name" -- ) \ core
                    359:     Create 0 , ;
                    360: 
                    361: : AVariable ( "name" -- ) \ gforth
                    362:     Create 0 A, ;
                    363: 
1.22    ! crook     364: : 2Variable ( "name" -- ) \ double two-variable
1.1       pazsan    365:     create 0 , 0 , ;
                    366: 
1.21      crook     367: : uallot ( n -- ) \ gforth
                    368:     udp @ swap udp +! ;
1.1       pazsan    369: 
                    370: doer? :douser [IF]
                    371: 
                    372: : User ( "name" -- ) \ gforth
                    373:     Header reveal douser: cfa, cell uallot , ;
                    374: 
                    375: : AUser ( "name" -- ) \ gforth
                    376:     User ;
                    377: [ELSE]
                    378: 
                    379: : User Create cell uallot , DOES> @ up @ + ;
                    380: 
                    381: : AUser User ;
                    382: [THEN]
                    383: 
                    384: doer? :docon [IF]
                    385:     : (Constant)  Header reveal docon: cfa, ;
                    386: [ELSE]
                    387:     : (Constant)  Create DOES> @ ;
                    388: [THEN]
                    389: 
                    390: : Constant ( w "name" -- ) \ core
1.15      crook     391:     \G Define a constant @i{name} with value @i{w}.
1.1       pazsan    392:     \G  
1.15      crook     393:     \G @i{name} execution: @i{-- w}
1.1       pazsan    394:     (Constant) , ;
                    395: 
                    396: : AConstant ( addr "name" -- ) \ gforth
                    397:     (Constant) A, ;
                    398: 
                    399: : Value ( w "name" -- ) \ core-ext
                    400:     (Constant) , ;
                    401: 
1.22    ! crook     402: : 2Constant ( w1 w2 "name" -- ) \ double two-constant
1.1       pazsan    403:     Create ( w1 w2 "name" -- )
                    404:         2,
                    405:     DOES> ( -- w1 w2 )
                    406:         2@ ;
                    407:     
                    408: doer? :dofield [IF]
                    409:     : (Field)  Header reveal dofield: cfa, ;
                    410: [ELSE]
                    411:     : (Field)  Create DOES> @ + ;
                    412: [THEN]
                    413: \ IS Defer What's Defers TO                            24feb93py
                    414: 
                    415: doer? :dodefer [IF]
                    416: 
                    417: : Defer ( "name" -- ) \ gforth
                    418:     \ !! shouldn't it be initialized with abort or something similar?
                    419:     Header Reveal dodefer: cfa,
                    420:     ['] noop A, ;
1.18      jwilke    421: 
1.1       pazsan    422: [ELSE]
                    423: 
                    424: : Defer ( "name" -- ) \ gforth
                    425:     Create ['] noop A,
                    426: DOES> @ execute ;
1.18      jwilke    427: 
1.1       pazsan    428: [THEN]
                    429: 
                    430: : Defers ( "name" -- ) \ gforth
                    431:     ' >body @ compile, ; immediate
1.18      jwilke    432: 
                    433: :noname
                    434:     dodoes, here !does ]
                    435:     defstart :-hook ;
                    436: :noname
                    437:     ;-hook ?struc
                    438:     [ has? xconds [IF] ] exit-like [ [THEN] ]
                    439:     postpone (does>) dodoes,
                    440:     defstart :-hook ;
                    441: interpret/compile: DOES>  ( compilation colon-sys1 -- colon-sys2 ; run-time nest-sys -- ) \ core        does
                    442: 
1.20      anton     443: : <IS> ( "name" xt -- ) \ gforth
                    444:     \g Changes the @code{defer}red word @var{name} to execute @var{xt}.
                    445:     ' >body ! ;
                    446: 
                    447: : [IS] ( compilation "name" -- ; run-time xt -- ) \ gforth bracket-is
                    448:     \g At run-time, changes the @code{defer}red word @var{name} to
                    449:     \g execute @var{xt}.
1.18      jwilke    450:     ' >body postpone ALiteral postpone ! ; immediate restrict
                    451: 
1.20      anton     452: ' <IS>
1.18      jwilke    453: ' [IS]
                    454: interpret/compile: IS ( xt "name" -- ) \ gforth
1.21      crook     455: \G A combined word made up from @code{<IS>} and @code{[IS]}.
1.18      jwilke    456: 
1.20      anton     457: ' <IS>
                    458: ' [IS]
                    459: interpret/compile: TO ( w "name" -- ) \ core-ext
1.18      jwilke    460: 
                    461: :noname    ' >body @ ;
                    462: :noname    ' >body postpone ALiteral postpone @ ;
                    463: interpret/compile: What's ( "name" -- addr ) \ gforth
                    464: 
                    465: \ \ interpret/compile:
                    466: 
                    467: struct
                    468:     >body
                    469:     cell% field interpret/compile-int
                    470:     cell% field interpret/compile-comp
                    471: end-struct interpret/compile-struct
                    472: 
                    473: : interpret/compile: ( interp-xt comp-xt "name" -- ) \ gforth
                    474:     Create immediate swap A, A,
                    475: DOES>
                    476:     abort" executed primary cfa of an interpret/compile: word" ;
                    477: \    state @ IF  cell+  THEN  perform ;
                    478: 
                    479: : interpret/compile? ( xt -- flag )
                    480:     >does-code ['] DOES> >does-code = ;
1.1       pazsan    481: 
                    482: \ \ : ;                                                        24feb93py
                    483: 
                    484: defer :-hook ( sys1 -- sys2 )
                    485: 
                    486: defer ;-hook ( sys2 -- sys1 )
                    487: 
1.16      jwilke    488: 0 Constant defstart
                    489: 
1.14      jwilke    490: [IFDEF] docol,
                    491: : (:noname) ( -- colon-sys )
                    492:     \ common factor of : and :noname
                    493:     docol, ]comp defstart ] :-hook ;
                    494: [ELSE]
1.7       anton     495: : (:noname) ( -- colon-sys )
                    496:     \ common factor of : and :noname
                    497:     docol: cfa, defstart ] :-hook ;
1.14      jwilke    498: [THEN]
1.7       anton     499: 
1.1       pazsan    500: : : ( "name" -- colon-sys ) \ core     colon
1.7       anton     501:     Header (:noname) ;
                    502: 
                    503: : :noname ( -- xt colon-sys ) \ core-ext       colon-no-name
                    504:     0 last !
                    505:     cfalign here (:noname) ;
1.1       pazsan    506: 
1.14      jwilke    507: [IFDEF] fini,
                    508: : ; ( compilation colon-sys -- ; run-time nest-sys ) \ core   semicolon
                    509:     ;-hook ?struc fini, comp[ reveal postpone [ ; immediate restrict
                    510: [ELSE]
1.1       pazsan    511: : ; ( compilation colon-sys -- ; run-time nest-sys ) \ core    semicolon
                    512:     ;-hook ?struc postpone exit reveal postpone [ ; immediate restrict
1.14      jwilke    513: [THEN]
1.1       pazsan    514: 
                    515: \ \ Search list handling: reveal words, recursive              23feb93py
                    516: 
                    517: : last?   ( -- false / nfa nfa )
                    518:     last @ ?dup ;
                    519: 
                    520: : (reveal) ( nt wid -- )
1.3       pazsan    521:     wordlist-id dup >r
1.1       pazsan    522:     @ over ( name>link ) ! 
                    523:     r> ! ;
                    524: 
                    525: \ make entry in wordlist-map
                    526: ' (reveal) f83search reveal-method !
                    527: 
                    528: Variable warnings ( -- addr ) \ gforth
                    529: G -1 warnings T !
                    530: 
                    531: : check-shadow  ( addr count wid -- )
1.2       pazsan    532:     \G prints a warning if the string is already present in the wordlist
                    533:     >r 2dup 2dup r> (search-wordlist) warnings @ and ?dup if
                    534:        >stderr
                    535:        ." redefined " name>string 2dup type
                    536:        compare 0<> if
                    537:            ."  with " type
                    538:        else
                    539:            2drop
                    540:        then
                    541:        space space EXIT
                    542:     then
                    543:     2drop 2drop ;
1.1       pazsan    544: 
                    545: : reveal ( -- ) \ gforth
                    546:     last?
                    547:     if \ the last word has a header
                    548:        dup ( name>link ) @ 1 and
                    549:        if \ it is still hidden
                    550:            dup ( name>link ) @ 1 xor           ( nt wid )
                    551:            2dup >r name>string r> check-shadow ( nt wid )
                    552:            dup wordlist-map @ reveal-method perform
                    553:        else
                    554:            drop
                    555:        then
                    556:     then ;
                    557: 
                    558: : rehash  ( wid -- )
                    559:     dup wordlist-map @ rehash-method perform ;
                    560: 
                    561: ' reveal alias recursive ( compilation -- ; run-time -- ) \ gforth
1.10      crook     562: \g Make the current definition visible, enabling it to call itself
1.1       pazsan    563: \g recursively.
                    564:        immediate restrict

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