Annotation of gforth/kernel/comp.fs, revision 1.38
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:
1.36 pazsan 213: has? peephole [IF]
1.34 anton 214: : peephole-compile, ( xt -- )
1.38 ! anton 215: \ compile xt, appending its code to the current dynamic superinstruction
! 216: compile-prim , ;
! 217:
! 218: \ : peephole-compile, ( xt -- )
! 219: \ \ compile xt, possibly combining it with the previous compiled xt
! 220: \ \ into a superinstruction (static superinstructions)
! 221: \ last-compiled @ ?dup if
! 222: \ @ over peeptable peephole-opt ?dup if
! 223: \ last-compiled @ ! drop EXIT
! 224: \ then
! 225: \ then
! 226: \ here last-compiled !
! 227: \ dyn-compile, ;
1.34 anton 228:
1.35 anton 229: : compile-to-prims, ( xt -- )
230: \G compile xt to use primitives (and their peephole optimization)
231: \G instead of ","-ing the xt.
232: \ !! all POSTPONEs here postpone primitives; this can be optimized
233: dup >does-code ?dup if
234: swap >body POSTPONE literal POSTPONE call , EXIT
235: then
236: dup >code-address CASE
237: docon: OF >body POSTPONE literal POSTPONE @ EXIT ENDOF
238: \ docon is also used by VALUEs, so don't @ at compile time
239: docol: OF >body POSTPONE call , EXIT ENDOF
240: dovar: OF >body POSTPONE literal EXIT ENDOF
241: douser: OF >body @ POSTPONE useraddr , EXIT ENDOF
242: dodefer: OF >body POSTPONE literal POSTPONE @ POSTPONE EXECUTE EXIT
243: ENDOF
244: dofield: OF >body @ POSTPONE literal POSTPONE + EXIT ENDOF
245: ENDCASE
246: peephole-compile, ;
247:
248: ' compile-to-prims, IS compile,
1.36 pazsan 249: [ELSE]
250: ' , is compile,
251: [THEN]
1.34 anton 252:
1.1 pazsan 253: : !does ( addr -- ) \ gforth store-does
254: lastxt does-code! ;
255:
256: : (does>) ( R: addr -- )
257: r> cfaligned /does-handler + !does ;
258:
259: : dodoes, ( -- )
260: cfalign here /does-handler allot does-handler! ;
261:
262: : (compile) ( -- ) \ gforth
263: r> dup cell+ >r @ compile, ;
264:
265: \ \ ticks
266:
267: : name>comp ( nt -- w xt ) \ gforth
1.15 crook 268: \G @i{w xt} is the compilation token for the word @i{nt}.
1.1 pazsan 269: (name>comp)
270: 1 = if
271: ['] execute
272: else
273: ['] compile,
274: then ;
275:
276: : [(')] ( compilation "name" -- ; run-time -- nt ) \ gforth bracket-paren-tick
277: (') postpone ALiteral ; immediate restrict
278:
279: : ['] ( compilation. "name" -- ; run-time. -- xt ) \ core bracket-tick
1.15 crook 280: \g @i{xt} represents @i{name}'s interpretation
281: \g semantics. Perform @code{-14 throw} if the word has no
1.1 pazsan 282: \g interpretation semantics.
283: ' postpone ALiteral ; immediate restrict
284:
1.5 anton 285: : COMP' ( "name" -- w xt ) \ gforth comp-tick
1.15 crook 286: \g Compilation token @i{w xt} represents @i{name}'s compilation semantics.
1.1 pazsan 287: (') name>comp ;
288:
289: : [COMP'] ( compilation "name" -- ; run-time -- w xt ) \ gforth bracket-comp-tick
1.15 crook 290: \g Compilation token @i{w xt} represents @i{name}'s compilation semantics.
1.1 pazsan 291: COMP' swap POSTPONE Aliteral POSTPONE ALiteral ; immediate restrict
292:
1.18 jwilke 293: : postpone, ( w xt -- ) \ gforth postpone-comma
1.26 anton 294: \g Compile the compilation semantics represented by the
295: \g compilation token @i{w xt}.
1.18 jwilke 296: dup ['] execute =
297: if
298: drop compile,
299: else
300: dup ['] compile, =
301: if
302: drop POSTPONE (compile) a,
303: else
304: swap POSTPONE aliteral compile,
305: then
306: then ;
307:
308: : POSTPONE ( "name" -- ) \ core
309: \g Compiles the compilation semantics of @i{name}.
310: COMP' postpone, ; immediate restrict
311:
1.1 pazsan 312: \ \ recurse 17may93jaw
313:
314: : recurse ( compilation -- ; run-time ?? -- ?? ) \ core
1.10 crook 315: \g Call the current definition.
1.1 pazsan 316: lastxt compile, ; immediate restrict
317:
318: \ \ compiler loop
319:
320: : compiler ( c-addr u -- )
321: 2dup find-name dup
322: if ( c-addr u nt )
323: nip nip name>comp execute
324: else
325: drop
326: 2dup snumber? dup
327: IF
328: 0>
329: IF
330: swap postpone Literal
331: THEN
332: postpone Literal
333: 2drop
334: ELSE
335: drop compiler-notfound
336: THEN
337: then ;
338:
1.22 crook 339: : [ ( -- ) \ core left-bracket
1.8 crook 340: \G Enter interpretation state. Immediate word.
1.1 pazsan 341: ['] interpreter IS parser state off ; immediate
342:
343: : ] ( -- ) \ core right-bracket
1.8 crook 344: \G Enter compilation state.
1.1 pazsan 345: ['] compiler IS parser state on ;
346:
347: \ \ Strings 22feb93py
348:
349: : ," ( "string"<"> -- ) [char] " parse
350: here over char+ allot place align ;
351:
352: : SLiteral ( Compilation c-addr1 u ; run-time -- c-addr2 u ) \ string
1.15 crook 353: \G Compilation: compile the string specified by @i{c-addr1},
354: \G @i{u} into the current definition. Run-time: return
355: \G @i{c-addr2 u} describing the address and length of the
1.10 crook 356: \G string.
1.1 pazsan 357: postpone (S") here over char+ allot place align ;
358: immediate restrict
359:
360: \ \ abort" 22feb93py
361:
362: : abort" ( compilation 'ccc"' -- ; run-time f -- ) \ core,exception-ext abort-quote
1.15 crook 363: \G If any bit of @i{f} is non-zero, perform the function of @code{-2 throw},
364: \G displaying the string @i{ccc} if there is no exception frame on the
1.10 crook 365: \G exception stack.
1.1 pazsan 366: postpone (abort") ," ; immediate restrict
367:
368: \ \ Header states 23feb93py
369:
370: : cset ( bmask c-addr -- )
1.30 anton 371: tuck @ or swap ! ;
1.1 pazsan 372:
373: : creset ( bmask c-addr -- )
1.30 anton 374: tuck @ swap invert and swap ! ;
1.1 pazsan 375:
376: : ctoggle ( bmask c-addr -- )
1.30 anton 377: tuck @ xor swap ! ;
1.1 pazsan 378:
379: : lastflags ( -- c-addr )
380: \ the address of the flags byte in the last header
381: \ aborts if the last defined word was headerless
382: last @ dup 0= abort" last word was headerless" cell+ ;
383:
384: : immediate ( -- ) \ core
1.10 crook 385: \G Make the compilation semantics of a word be to @code{execute}
386: \G the execution semantics.
1.1 pazsan 387: immediate-mask lastflags cset ;
388:
389: : restrict ( -- ) \ gforth
1.10 crook 390: \G A synonym for @code{compile-only}
1.1 pazsan 391: restrict-mask lastflags cset ;
1.18 jwilke 392:
1.1 pazsan 393: ' restrict alias compile-only ( -- ) \ gforth
1.10 crook 394: \G Remove the interpretation semantics of a word.
1.1 pazsan 395:
396: \ \ Create Variable User Constant 17mar93py
397:
1.15 crook 398: : Alias ( xt "name" -- ) \ gforth
1.1 pazsan 399: Header reveal
400: alias-mask lastflags creset
401: dup A, lastcfa ! ;
402:
403: doer? :dovar [IF]
404:
405: : Create ( "name" -- ) \ core
406: Header reveal dovar: cfa, ;
407: [ELSE]
408:
409: : Create ( "name" -- ) \ core
410: Header reveal here lastcfa ! 0 A, 0 , DOES> ;
411: [THEN]
412:
413: : Variable ( "name" -- ) \ core
414: Create 0 , ;
415:
416: : AVariable ( "name" -- ) \ gforth
417: Create 0 A, ;
418:
1.22 crook 419: : 2Variable ( "name" -- ) \ double two-variable
1.1 pazsan 420: create 0 , 0 , ;
421:
1.21 crook 422: : uallot ( n -- ) \ gforth
423: udp @ swap udp +! ;
1.1 pazsan 424:
425: doer? :douser [IF]
426:
427: : User ( "name" -- ) \ gforth
428: Header reveal douser: cfa, cell uallot , ;
429:
430: : AUser ( "name" -- ) \ gforth
431: User ;
432: [ELSE]
433:
434: : User Create cell uallot , DOES> @ up @ + ;
435:
436: : AUser User ;
437: [THEN]
438:
439: doer? :docon [IF]
440: : (Constant) Header reveal docon: cfa, ;
441: [ELSE]
442: : (Constant) Create DOES> @ ;
443: [THEN]
444:
445: : Constant ( w "name" -- ) \ core
1.15 crook 446: \G Define a constant @i{name} with value @i{w}.
1.1 pazsan 447: \G
1.15 crook 448: \G @i{name} execution: @i{-- w}
1.1 pazsan 449: (Constant) , ;
450:
451: : AConstant ( addr "name" -- ) \ gforth
452: (Constant) A, ;
453:
454: : Value ( w "name" -- ) \ core-ext
455: (Constant) , ;
456:
1.37 jwilke 457: : AValue ( w "name" -- ) \ core-ext
458: (Constant) A, ;
459:
1.22 crook 460: : 2Constant ( w1 w2 "name" -- ) \ double two-constant
1.1 pazsan 461: Create ( w1 w2 "name" -- )
462: 2,
463: DOES> ( -- w1 w2 )
464: 2@ ;
465:
466: doer? :dofield [IF]
467: : (Field) Header reveal dofield: cfa, ;
468: [ELSE]
469: : (Field) Create DOES> @ + ;
470: [THEN]
471: \ IS Defer What's Defers TO 24feb93py
472:
473: doer? :dodefer [IF]
474:
475: : Defer ( "name" -- ) \ gforth
476: \ !! shouldn't it be initialized with abort or something similar?
477: Header Reveal dodefer: cfa,
478: ['] noop A, ;
1.18 jwilke 479:
1.1 pazsan 480: [ELSE]
481:
482: : Defer ( "name" -- ) \ gforth
483: Create ['] noop A,
484: DOES> @ execute ;
1.18 jwilke 485:
1.1 pazsan 486: [THEN]
487:
1.25 anton 488: : Defers ( compilation "name" -- ; run-time ... -- ... ) \ gforth
489: \G Compiles the present contents of the deferred word @i{name}
490: \G into the current definition. I.e., this produces static
491: \G binding as if @i{name} was not deferred.
1.1 pazsan 492: ' >body @ compile, ; immediate
1.18 jwilke 493:
494: :noname
495: dodoes, here !does ]
496: defstart :-hook ;
497: :noname
498: ;-hook ?struc
499: [ has? xconds [IF] ] exit-like [ [THEN] ]
500: postpone (does>) dodoes,
501: defstart :-hook ;
502: interpret/compile: DOES> ( compilation colon-sys1 -- colon-sys2 ; run-time nest-sys -- ) \ core does
503:
1.20 anton 504: : <IS> ( "name" xt -- ) \ gforth
505: \g Changes the @code{defer}red word @var{name} to execute @var{xt}.
506: ' >body ! ;
507:
508: : [IS] ( compilation "name" -- ; run-time xt -- ) \ gforth bracket-is
509: \g At run-time, changes the @code{defer}red word @var{name} to
510: \g execute @var{xt}.
1.18 jwilke 511: ' >body postpone ALiteral postpone ! ; immediate restrict
512:
1.20 anton 513: ' <IS>
1.18 jwilke 514: ' [IS]
515: interpret/compile: IS ( xt "name" -- ) \ gforth
1.21 crook 516: \G A combined word made up from @code{<IS>} and @code{[IS]}.
1.18 jwilke 517:
1.20 anton 518: ' <IS>
519: ' [IS]
520: interpret/compile: TO ( w "name" -- ) \ core-ext
1.18 jwilke 521:
522: :noname ' >body @ ;
523: :noname ' >body postpone ALiteral postpone @ ;
1.25 anton 524: interpret/compile: What's ( interpretation "name" -- xt; compilation "name" -- ; run-time -- xt ) \ gforth
525: \G @i{Xt} is the XT that is currently assigned to @i{name}.
1.18 jwilke 526:
527: \ \ interpret/compile:
528:
529: struct
530: >body
531: cell% field interpret/compile-int
532: cell% field interpret/compile-comp
533: end-struct interpret/compile-struct
534:
535: : interpret/compile: ( interp-xt comp-xt "name" -- ) \ gforth
536: Create immediate swap A, A,
537: DOES>
538: abort" executed primary cfa of an interpret/compile: word" ;
539: \ state @ IF cell+ THEN perform ;
540:
541: : interpret/compile? ( xt -- flag )
542: >does-code ['] DOES> >does-code = ;
1.1 pazsan 543:
544: \ \ : ; 24feb93py
545:
546: defer :-hook ( sys1 -- sys2 )
547:
548: defer ;-hook ( sys2 -- sys1 )
549:
1.16 jwilke 550: 0 Constant defstart
551:
1.14 jwilke 552: [IFDEF] docol,
553: : (:noname) ( -- colon-sys )
554: \ common factor of : and :noname
1.34 anton 555: docol, ]comp
1.14 jwilke 556: [ELSE]
1.7 anton 557: : (:noname) ( -- colon-sys )
558: \ common factor of : and :noname
1.34 anton 559: docol: cfa,
1.14 jwilke 560: [THEN]
1.34 anton 561: 0 last-compiled ! defstart ] :-hook ;
1.7 anton 562:
1.1 pazsan 563: : : ( "name" -- colon-sys ) \ core colon
1.7 anton 564: Header (:noname) ;
565:
566: : :noname ( -- xt colon-sys ) \ core-ext colon-no-name
567: 0 last !
568: cfalign here (:noname) ;
1.1 pazsan 569:
1.14 jwilke 570: [IFDEF] fini,
571: : ; ( compilation colon-sys -- ; run-time nest-sys ) \ core semicolon
572: ;-hook ?struc fini, comp[ reveal postpone [ ; immediate restrict
573: [ELSE]
1.1 pazsan 574: : ; ( compilation colon-sys -- ; run-time nest-sys ) \ core semicolon
1.37 jwilke 575: ;-hook ?struc [compile] exit reveal postpone [ ; immediate restrict
1.14 jwilke 576: [THEN]
1.1 pazsan 577:
578: \ \ Search list handling: reveal words, recursive 23feb93py
579:
580: : last? ( -- false / nfa nfa )
581: last @ ?dup ;
582:
583: : (reveal) ( nt wid -- )
1.3 pazsan 584: wordlist-id dup >r
1.1 pazsan 585: @ over ( name>link ) !
586: r> ! ;
587:
588: \ make entry in wordlist-map
589: ' (reveal) f83search reveal-method !
590:
591: Variable warnings ( -- addr ) \ gforth
592: G -1 warnings T !
593:
594: : check-shadow ( addr count wid -- )
1.2 pazsan 595: \G prints a warning if the string is already present in the wordlist
596: >r 2dup 2dup r> (search-wordlist) warnings @ and ?dup if
597: >stderr
598: ." redefined " name>string 2dup type
599: compare 0<> if
600: ." with " type
601: else
602: 2drop
603: then
604: space space EXIT
605: then
606: 2drop 2drop ;
1.1 pazsan 607:
608: : reveal ( -- ) \ gforth
609: last?
610: if \ the last word has a header
611: dup ( name>link ) @ 1 and
612: if \ it is still hidden
613: dup ( name>link ) @ 1 xor ( nt wid )
614: 2dup >r name>string r> check-shadow ( nt wid )
615: dup wordlist-map @ reveal-method perform
616: else
617: drop
618: then
619: then ;
620:
621: : rehash ( wid -- )
622: dup wordlist-map @ rehash-method perform ;
623:
624: ' reveal alias recursive ( compilation -- ; run-time -- ) \ gforth
1.10 crook 625: \g Make the current definition visible, enabling it to call itself
1.1 pazsan 626: \g recursively.
627: immediate restrict
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