Annotation of gforth/kernel/comp.fs, revision 1.35
1.1 pazsan 1: \ compiler definitions 14sep97jaw
2:
1.28 anton 3: \ Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc.
1.6 anton 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
1.29 anton 19: \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
1.6 anton 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
1.23 anton 38: \G Reserve @i{n} address units of data space without
39: \G initialization. @i{n} is a signed number, passing a negative
40: \G @i{n} releases memory. In ANS Forth you can only deallocate
41: \G memory from the current contiguous region in this way. In
42: \G Gforth you can deallocate anything in this way but named words.
43: \G The system does not check this restriction.
1.12 anton 44: here +
45: dup 1- usable-dictionary-end forthstart within -8 and throw
46: dp ! ;
1.14 jwilke 47: [THEN]
1.1 pazsan 48:
1.22 crook 49: : c, ( c -- ) \ core c-comma
1.15 crook 50: \G Reserve data space for one char and store @i{c} in the space.
1.1 pazsan 51: here 1 chars allot c! ;
52:
1.22 crook 53: : , ( w -- ) \ core comma
1.15 crook 54: \G Reserve data space for one cell and store @i{w} in the space.
1.1 pazsan 55: here cell allot ! ;
56:
57: : 2, ( w1 w2 -- ) \ gforth
1.15 crook 58: \G Reserve data space for two cells and store the double @i{w1
1.24 anton 59: \G w2} there, @i{w2} first (lower address).
1.1 pazsan 60: here 2 cells allot 2! ;
61:
62: \ : aligned ( addr -- addr' ) \ core
63: \ [ cell 1- ] Literal + [ -1 cells ] Literal and ;
64:
65: : align ( -- ) \ core
1.15 crook 66: \G If the data-space pointer is not aligned, reserve enough space to align it.
1.1 pazsan 67: here dup aligned swap ?DO bl c, LOOP ;
68:
1.22 crook 69: \ : faligned ( addr -- f-addr ) \ float f-aligned
1.1 pazsan 70: \ [ 1 floats 1- ] Literal + [ -1 floats ] Literal and ;
71:
1.22 crook 72: : falign ( -- ) \ float f-align
1.15 crook 73: \G If the data-space pointer is not float-aligned, reserve
74: \G enough space to align it.
1.1 pazsan 75: here dup faligned swap
76: ?DO
77: bl c,
78: LOOP ;
79:
1.9 anton 80: : maxalign ( -- ) \ gforth
1.23 anton 81: \G Align data-space pointer for all alignment requirements.
1.1 pazsan 82: here dup maxaligned swap
83: ?DO
84: bl c,
85: LOOP ;
86:
87: \ the code field is aligned if its body is maxaligned
88: ' maxalign Alias cfalign ( -- ) \ gforth
1.24 anton 89: \G Align data-space pointer for code field requirements (i.e., such
90: \G that the corresponding body is maxaligned).
1.1 pazsan 91:
92: ' , alias A, ( addr -- ) \ gforth
93:
94: ' NOOP ALIAS const
95:
96: \ \ Header 23feb93py
97:
98: \ input-stream, nextname and noname are quite ugly (passing
99: \ information through global variables), but they are useful for dealing
100: \ with existing/independent defining words
101:
102: defer (header)
103: defer header ( -- ) \ gforth
104: ' (header) IS header
105:
106: : string, ( c-addr u -- ) \ gforth
107: \G puts down string as cstring
108: dup c, here swap chars dup allot move ;
109:
1.30 anton 110: : longstring, ( c-addr u -- ) \ gforth
111: \G puts down string as cstring
112: dup , here swap chars dup allot move ;
113:
1.1 pazsan 114: : header, ( c-addr u -- ) \ gforth
115: name-too-long?
116: align here last !
117: current @ 1 or A, \ link field; before revealing, it contains the
118: \ tagged reveal-into wordlist
1.30 anton 119: longstring, cfalign
1.1 pazsan 120: alias-mask lastflags cset ;
121:
122: : input-stream-header ( "name" -- )
123: name name-too-short? header, ;
124:
125: : input-stream ( -- ) \ general
126: \G switches back to getting the name from the input stream ;
127: ['] input-stream-header IS (header) ;
128:
129: ' input-stream-header IS (header)
130:
1.32 anton 131: 2variable nextname-string
1.1 pazsan 132:
1.33 pazsan 133: has? OS [IF]
1.1 pazsan 134: : nextname-header ( -- )
1.32 anton 135: nextname-string 2@ header,
136: nextname-string free-mem-var
1.1 pazsan 137: input-stream ;
1.33 pazsan 138: [THEN]
1.1 pazsan 139:
140: \ the next name is given in the string
141:
1.33 pazsan 142: has? OS [IF]
1.1 pazsan 143: : nextname ( c-addr u -- ) \ gforth
1.19 anton 144: \g The next defined word will have the name @var{c-addr u}; the
145: \g defining word will leave the input stream alone.
1.1 pazsan 146: name-too-long?
1.32 anton 147: nextname-string free-mem-var
148: save-mem nextname-string 2!
1.1 pazsan 149: ['] nextname-header IS (header) ;
1.33 pazsan 150: [THEN]
1.1 pazsan 151:
152: : noname-header ( -- )
153: 0 last ! cfalign
154: input-stream ;
155:
156: : noname ( -- ) \ gforth
1.19 anton 157: \g The next defined word will be anonymous. The defining word will
158: \g leave the input stream alone. The xt of the defined word will
159: \g be given by @code{lastxt}.
1.1 pazsan 160: ['] noname-header IS (header) ;
161:
162: : lastxt ( -- xt ) \ gforth
1.15 crook 163: \G @i{xt} is the execution token of the last word defined.
1.13 crook 164: \ The main purpose of this word is to get the xt of words defined using noname
1.1 pazsan 165: lastcfa @ ;
166:
167: \ \ literals 17dec92py
168:
169: : Literal ( compilation n -- ; run-time -- n ) \ core
1.27 anton 170: \G Compilation semantics: compile the run-time semantics.@*
171: \G Run-time Semantics: push @i{n}.@*
172: \G Interpretation semantics: undefined.
1.14 jwilke 173: [ [IFDEF] lit, ]
174: lit,
175: [ [ELSE] ]
1.27 anton 176: postpone lit ,
1.14 jwilke 177: [ [THEN] ] ; immediate restrict
1.1 pazsan 178:
179: : ALiteral ( compilation addr -- ; run-time -- addr ) \ gforth
1.14 jwilke 180: [ [IFDEF] alit, ]
181: alit,
182: [ [ELSE] ]
183: postpone lit A,
184: [ [THEN] ] ; immediate restrict
1.1 pazsan 185:
1.8 crook 186: : char ( '<spaces>ccc' -- c ) \ core
1.15 crook 187: \G Skip leading spaces. Parse the string @i{ccc} and return @i{c}, the
188: \G display code representing the first character of @i{ccc}.
1.1 pazsan 189: bl word char+ c@ ;
190:
1.8 crook 191: : [char] ( compilation '<spaces>ccc' -- ; run-time -- c ) \ core bracket-char
1.10 crook 192: \G Compilation: skip leading spaces. Parse the string
1.15 crook 193: \G @i{ccc}. Run-time: return @i{c}, the display code
194: \G representing the first character of @i{ccc}. Interpretation
1.10 crook 195: \G semantics for this word are undefined.
1.1 pazsan 196: char postpone Literal ; immediate restrict
197:
198: \ \ threading 17mar93py
199:
200: : cfa, ( code-address -- ) \ gforth cfa-comma
201: here
202: dup lastcfa !
203: 0 A, 0 , code-address! ;
204:
1.14 jwilke 205: [IFUNDEF] compile,
1.34 anton 206: defer compile, ( xt -- ) \ core-ext compile-comma
207: \G Compile the word represented by the execution token @i{xt}
208: \G into the current definition.
209:
210: ' , is compile,
1.14 jwilke 211: [THEN]
1.1 pazsan 212:
1.34 anton 213: : peephole-compile, ( xt -- )
214: last-compiled @ ?dup if
215: @ over peeptable peephole-opt ?dup if
216: last-compiled @ ! drop EXIT
217: then
218: then
219: here last-compiled !
220: , ;
221:
1.35 ! anton 222: : compile-to-prims, ( xt -- )
! 223: \G compile xt to use primitives (and their peephole optimization)
! 224: \G instead of ","-ing the xt.
! 225: \ !! all POSTPONEs here postpone primitives; this can be optimized
! 226: dup >does-code ?dup if
! 227: swap >body POSTPONE literal POSTPONE call , EXIT
! 228: then
! 229: dup >code-address CASE
! 230: docon: OF >body POSTPONE literal POSTPONE @ EXIT ENDOF
! 231: \ docon is also used by VALUEs, so don't @ at compile time
! 232: docol: OF >body POSTPONE call , EXIT ENDOF
! 233: dovar: OF >body POSTPONE literal EXIT ENDOF
! 234: douser: OF >body @ POSTPONE useraddr , EXIT ENDOF
! 235: dodefer: OF >body POSTPONE literal POSTPONE @ POSTPONE EXECUTE EXIT
! 236: ENDOF
! 237: dofield: OF >body @ POSTPONE literal POSTPONE + EXIT ENDOF
! 238: ENDCASE
! 239: peephole-compile, ;
! 240:
! 241: ' compile-to-prims, IS compile,
1.34 anton 242:
1.1 pazsan 243: : !does ( addr -- ) \ gforth store-does
244: lastxt does-code! ;
245:
246: : (does>) ( R: addr -- )
247: r> cfaligned /does-handler + !does ;
248:
249: : dodoes, ( -- )
250: cfalign here /does-handler allot does-handler! ;
251:
252: : (compile) ( -- ) \ gforth
253: r> dup cell+ >r @ compile, ;
254:
255: \ \ ticks
256:
257: : name>comp ( nt -- w xt ) \ gforth
1.15 crook 258: \G @i{w xt} is the compilation token for the word @i{nt}.
1.1 pazsan 259: (name>comp)
260: 1 = if
261: ['] execute
262: else
263: ['] compile,
264: then ;
265:
266: : [(')] ( compilation "name" -- ; run-time -- nt ) \ gforth bracket-paren-tick
267: (') postpone ALiteral ; immediate restrict
268:
269: : ['] ( compilation. "name" -- ; run-time. -- xt ) \ core bracket-tick
1.15 crook 270: \g @i{xt} represents @i{name}'s interpretation
271: \g semantics. Perform @code{-14 throw} if the word has no
1.1 pazsan 272: \g interpretation semantics.
273: ' postpone ALiteral ; immediate restrict
274:
1.5 anton 275: : COMP' ( "name" -- w xt ) \ gforth comp-tick
1.15 crook 276: \g Compilation token @i{w xt} represents @i{name}'s compilation semantics.
1.1 pazsan 277: (') name>comp ;
278:
279: : [COMP'] ( compilation "name" -- ; run-time -- w xt ) \ gforth bracket-comp-tick
1.15 crook 280: \g Compilation token @i{w xt} represents @i{name}'s compilation semantics.
1.1 pazsan 281: COMP' swap POSTPONE Aliteral POSTPONE ALiteral ; immediate restrict
282:
1.18 jwilke 283: : postpone, ( w xt -- ) \ gforth postpone-comma
1.26 anton 284: \g Compile the compilation semantics represented by the
285: \g compilation token @i{w xt}.
1.18 jwilke 286: dup ['] execute =
287: if
288: drop compile,
289: else
290: dup ['] compile, =
291: if
292: drop POSTPONE (compile) a,
293: else
294: swap POSTPONE aliteral compile,
295: then
296: then ;
297:
298: : POSTPONE ( "name" -- ) \ core
299: \g Compiles the compilation semantics of @i{name}.
300: COMP' postpone, ; immediate restrict
301:
1.1 pazsan 302: \ \ recurse 17may93jaw
303:
304: : recurse ( compilation -- ; run-time ?? -- ?? ) \ core
1.10 crook 305: \g Call the current definition.
1.1 pazsan 306: lastxt compile, ; immediate restrict
307:
308: \ \ compiler loop
309:
310: : compiler ( c-addr u -- )
311: 2dup find-name dup
312: if ( c-addr u nt )
313: nip nip name>comp execute
314: else
315: drop
316: 2dup snumber? dup
317: IF
318: 0>
319: IF
320: swap postpone Literal
321: THEN
322: postpone Literal
323: 2drop
324: ELSE
325: drop compiler-notfound
326: THEN
327: then ;
328:
1.22 crook 329: : [ ( -- ) \ core left-bracket
1.8 crook 330: \G Enter interpretation state. Immediate word.
1.1 pazsan 331: ['] interpreter IS parser state off ; immediate
332:
333: : ] ( -- ) \ core right-bracket
1.8 crook 334: \G Enter compilation state.
1.1 pazsan 335: ['] compiler IS parser state on ;
336:
337: \ \ Strings 22feb93py
338:
339: : ," ( "string"<"> -- ) [char] " parse
340: here over char+ allot place align ;
341:
342: : SLiteral ( Compilation c-addr1 u ; run-time -- c-addr2 u ) \ string
1.15 crook 343: \G Compilation: compile the string specified by @i{c-addr1},
344: \G @i{u} into the current definition. Run-time: return
345: \G @i{c-addr2 u} describing the address and length of the
1.10 crook 346: \G string.
1.1 pazsan 347: postpone (S") here over char+ allot place align ;
348: immediate restrict
349:
350: \ \ abort" 22feb93py
351:
352: : abort" ( compilation 'ccc"' -- ; run-time f -- ) \ core,exception-ext abort-quote
1.15 crook 353: \G If any bit of @i{f} is non-zero, perform the function of @code{-2 throw},
354: \G displaying the string @i{ccc} if there is no exception frame on the
1.10 crook 355: \G exception stack.
1.1 pazsan 356: postpone (abort") ," ; immediate restrict
357:
358: \ \ Header states 23feb93py
359:
360: : cset ( bmask c-addr -- )
1.30 anton 361: tuck @ or swap ! ;
1.1 pazsan 362:
363: : creset ( bmask c-addr -- )
1.30 anton 364: tuck @ swap invert and swap ! ;
1.1 pazsan 365:
366: : ctoggle ( bmask c-addr -- )
1.30 anton 367: tuck @ xor swap ! ;
1.1 pazsan 368:
369: : lastflags ( -- c-addr )
370: \ the address of the flags byte in the last header
371: \ aborts if the last defined word was headerless
372: last @ dup 0= abort" last word was headerless" cell+ ;
373:
374: : immediate ( -- ) \ core
1.10 crook 375: \G Make the compilation semantics of a word be to @code{execute}
376: \G the execution semantics.
1.1 pazsan 377: immediate-mask lastflags cset ;
378:
379: : restrict ( -- ) \ gforth
1.10 crook 380: \G A synonym for @code{compile-only}
1.1 pazsan 381: restrict-mask lastflags cset ;
1.18 jwilke 382:
1.1 pazsan 383: ' restrict alias compile-only ( -- ) \ gforth
1.10 crook 384: \G Remove the interpretation semantics of a word.
1.1 pazsan 385:
386: \ \ Create Variable User Constant 17mar93py
387:
1.15 crook 388: : Alias ( xt "name" -- ) \ gforth
1.1 pazsan 389: Header reveal
390: alias-mask lastflags creset
391: dup A, lastcfa ! ;
392:
393: doer? :dovar [IF]
394:
395: : Create ( "name" -- ) \ core
396: Header reveal dovar: cfa, ;
397: [ELSE]
398:
399: : Create ( "name" -- ) \ core
400: Header reveal here lastcfa ! 0 A, 0 , DOES> ;
401: [THEN]
402:
403: : Variable ( "name" -- ) \ core
404: Create 0 , ;
405:
406: : AVariable ( "name" -- ) \ gforth
407: Create 0 A, ;
408:
1.22 crook 409: : 2Variable ( "name" -- ) \ double two-variable
1.1 pazsan 410: create 0 , 0 , ;
411:
1.21 crook 412: : uallot ( n -- ) \ gforth
413: udp @ swap udp +! ;
1.1 pazsan 414:
415: doer? :douser [IF]
416:
417: : User ( "name" -- ) \ gforth
418: Header reveal douser: cfa, cell uallot , ;
419:
420: : AUser ( "name" -- ) \ gforth
421: User ;
422: [ELSE]
423:
424: : User Create cell uallot , DOES> @ up @ + ;
425:
426: : AUser User ;
427: [THEN]
428:
429: doer? :docon [IF]
430: : (Constant) Header reveal docon: cfa, ;
431: [ELSE]
432: : (Constant) Create DOES> @ ;
433: [THEN]
434:
435: : Constant ( w "name" -- ) \ core
1.15 crook 436: \G Define a constant @i{name} with value @i{w}.
1.1 pazsan 437: \G
1.15 crook 438: \G @i{name} execution: @i{-- w}
1.1 pazsan 439: (Constant) , ;
440:
441: : AConstant ( addr "name" -- ) \ gforth
442: (Constant) A, ;
443:
444: : Value ( w "name" -- ) \ core-ext
445: (Constant) , ;
446:
1.22 crook 447: : 2Constant ( w1 w2 "name" -- ) \ double two-constant
1.1 pazsan 448: Create ( w1 w2 "name" -- )
449: 2,
450: DOES> ( -- w1 w2 )
451: 2@ ;
452:
453: doer? :dofield [IF]
454: : (Field) Header reveal dofield: cfa, ;
455: [ELSE]
456: : (Field) Create DOES> @ + ;
457: [THEN]
458: \ IS Defer What's Defers TO 24feb93py
459:
460: doer? :dodefer [IF]
461:
462: : Defer ( "name" -- ) \ gforth
463: \ !! shouldn't it be initialized with abort or something similar?
464: Header Reveal dodefer: cfa,
465: ['] noop A, ;
1.18 jwilke 466:
1.1 pazsan 467: [ELSE]
468:
469: : Defer ( "name" -- ) \ gforth
470: Create ['] noop A,
471: DOES> @ execute ;
1.18 jwilke 472:
1.1 pazsan 473: [THEN]
474:
1.25 anton 475: : Defers ( compilation "name" -- ; run-time ... -- ... ) \ gforth
476: \G Compiles the present contents of the deferred word @i{name}
477: \G into the current definition. I.e., this produces static
478: \G binding as if @i{name} was not deferred.
1.1 pazsan 479: ' >body @ compile, ; immediate
1.18 jwilke 480:
481: :noname
482: dodoes, here !does ]
483: defstart :-hook ;
484: :noname
485: ;-hook ?struc
486: [ has? xconds [IF] ] exit-like [ [THEN] ]
487: postpone (does>) dodoes,
488: defstart :-hook ;
489: interpret/compile: DOES> ( compilation colon-sys1 -- colon-sys2 ; run-time nest-sys -- ) \ core does
490:
1.20 anton 491: : <IS> ( "name" xt -- ) \ gforth
492: \g Changes the @code{defer}red word @var{name} to execute @var{xt}.
493: ' >body ! ;
494:
495: : [IS] ( compilation "name" -- ; run-time xt -- ) \ gforth bracket-is
496: \g At run-time, changes the @code{defer}red word @var{name} to
497: \g execute @var{xt}.
1.18 jwilke 498: ' >body postpone ALiteral postpone ! ; immediate restrict
499:
1.20 anton 500: ' <IS>
1.18 jwilke 501: ' [IS]
502: interpret/compile: IS ( xt "name" -- ) \ gforth
1.21 crook 503: \G A combined word made up from @code{<IS>} and @code{[IS]}.
1.18 jwilke 504:
1.20 anton 505: ' <IS>
506: ' [IS]
507: interpret/compile: TO ( w "name" -- ) \ core-ext
1.18 jwilke 508:
509: :noname ' >body @ ;
510: :noname ' >body postpone ALiteral postpone @ ;
1.25 anton 511: interpret/compile: What's ( interpretation "name" -- xt; compilation "name" -- ; run-time -- xt ) \ gforth
512: \G @i{Xt} is the XT that is currently assigned to @i{name}.
1.18 jwilke 513:
514: \ \ interpret/compile:
515:
516: struct
517: >body
518: cell% field interpret/compile-int
519: cell% field interpret/compile-comp
520: end-struct interpret/compile-struct
521:
522: : interpret/compile: ( interp-xt comp-xt "name" -- ) \ gforth
523: Create immediate swap A, A,
524: DOES>
525: abort" executed primary cfa of an interpret/compile: word" ;
526: \ state @ IF cell+ THEN perform ;
527:
528: : interpret/compile? ( xt -- flag )
529: >does-code ['] DOES> >does-code = ;
1.1 pazsan 530:
531: \ \ : ; 24feb93py
532:
533: defer :-hook ( sys1 -- sys2 )
534:
535: defer ;-hook ( sys2 -- sys1 )
536:
1.16 jwilke 537: 0 Constant defstart
538:
1.14 jwilke 539: [IFDEF] docol,
540: : (:noname) ( -- colon-sys )
541: \ common factor of : and :noname
1.34 anton 542: docol, ]comp
1.14 jwilke 543: [ELSE]
1.7 anton 544: : (:noname) ( -- colon-sys )
545: \ common factor of : and :noname
1.34 anton 546: docol: cfa,
1.14 jwilke 547: [THEN]
1.34 anton 548: 0 last-compiled ! defstart ] :-hook ;
1.7 anton 549:
1.1 pazsan 550: : : ( "name" -- colon-sys ) \ core colon
1.7 anton 551: Header (:noname) ;
552:
553: : :noname ( -- xt colon-sys ) \ core-ext colon-no-name
554: 0 last !
555: cfalign here (:noname) ;
1.1 pazsan 556:
1.14 jwilke 557: [IFDEF] fini,
558: : ; ( compilation colon-sys -- ; run-time nest-sys ) \ core semicolon
559: ;-hook ?struc fini, comp[ reveal postpone [ ; immediate restrict
560: [ELSE]
1.1 pazsan 561: : ; ( compilation colon-sys -- ; run-time nest-sys ) \ core semicolon
562: ;-hook ?struc postpone exit reveal postpone [ ; immediate restrict
1.14 jwilke 563: [THEN]
1.1 pazsan 564:
565: \ \ Search list handling: reveal words, recursive 23feb93py
566:
567: : last? ( -- false / nfa nfa )
568: last @ ?dup ;
569:
570: : (reveal) ( nt wid -- )
1.3 pazsan 571: wordlist-id dup >r
1.1 pazsan 572: @ over ( name>link ) !
573: r> ! ;
574:
575: \ make entry in wordlist-map
576: ' (reveal) f83search reveal-method !
577:
578: Variable warnings ( -- addr ) \ gforth
579: G -1 warnings T !
580:
581: : check-shadow ( addr count wid -- )
1.2 pazsan 582: \G prints a warning if the string is already present in the wordlist
583: >r 2dup 2dup r> (search-wordlist) warnings @ and ?dup if
584: >stderr
585: ." redefined " name>string 2dup type
586: compare 0<> if
587: ." with " type
588: else
589: 2drop
590: then
591: space space EXIT
592: then
593: 2drop 2drop ;
1.1 pazsan 594:
595: : reveal ( -- ) \ gforth
596: last?
597: if \ the last word has a header
598: dup ( name>link ) @ 1 and
599: if \ it is still hidden
600: dup ( name>link ) @ 1 xor ( nt wid )
601: 2dup >r name>string r> check-shadow ( nt wid )
602: dup wordlist-map @ reveal-method perform
603: else
604: drop
605: then
606: then ;
607:
608: : rehash ( wid -- )
609: dup wordlist-map @ rehash-method perform ;
610:
611: ' reveal alias recursive ( compilation -- ; run-time -- ) \ gforth
1.10 crook 612: \g Make the current definition visible, enabling it to call itself
1.1 pazsan 613: \g recursively.
614: immediate restrict
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