Annotation of gforth/kernel/comp.fs, revision 1.40
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:
1.40 ! anton 213: defer basic-block-end ( -- )
! 214:
! 215: : bb-end ( -- )
! 216: 0 last-compiled ! ;
! 217: ' bb-end is basic-block-end
! 218:
1.36 pazsan 219: has? peephole [IF]
1.40 ! anton 220:
! 221: \ dynamic only
! 222: \ : peephole-compile, ( xt -- )
! 223: \ \ compile xt, appending its code to the current dynamic superinstruction
! 224: \ compile-prim , ;
1.38 anton 225:
1.40 ! anton 226: \ static only
1.38 anton 227: \ : peephole-compile, ( xt -- )
228: \ \ compile xt, possibly combining it with the previous compiled xt
229: \ \ into a superinstruction (static superinstructions)
230: \ last-compiled @ ?dup if
231: \ @ over peeptable peephole-opt ?dup if
232: \ last-compiled @ ! drop EXIT
233: \ then
234: \ then
235: \ here last-compiled !
236: \ dyn-compile, ;
1.34 anton 237:
1.40 ! anton 238: : dyn-compile! ( xt -- )
! 239: \ compile xt, appending its code to the current dynamic superinstruction
! 240: compile-prim last-compiled-here @ ! ;
! 241:
! 242: :noname ( -- )
! 243: last-compiled @ if
! 244: last-compiled @ dyn-compile!
! 245: 0 last-compiled !
! 246: then ;
! 247: is basic-block-end
! 248:
! 249: : static-compile, ( xt -- )
! 250: \ compile xt, possibly combining it with the previous compiled xt
! 251: \ into a superinstruction (static superinstructions)
! 252: last-compiled @ ?dup if
! 253: over peeptable peephole-opt ?dup if ( xt comb-xt )
! 254: last-compiled ! drop EXIT
! 255: then ( xt )
! 256: last-compiled @ dyn-compile!
! 257: then ( xt )
! 258: last-compiled !
! 259: here last-compiled-here ! 0 , ;
! 260:
1.35 anton 261: : compile-to-prims, ( xt -- )
262: \G compile xt to use primitives (and their peephole optimization)
263: \G instead of ","-ing the xt.
264: \ !! all POSTPONEs here postpone primitives; this can be optimized
1.39 pazsan 265: dup >does-code if
266: POSTPONE does-exec , EXIT
1.35 anton 267: then
268: dup >code-address CASE
1.39 pazsan 269: docon: OF >body POSTPONE lit@ , EXIT ENDOF
1.35 anton 270: \ docon is also used by VALUEs, so don't @ at compile time
271: docol: OF >body POSTPONE call , EXIT ENDOF
272: dovar: OF >body POSTPONE literal EXIT ENDOF
273: douser: OF >body @ POSTPONE useraddr , EXIT ENDOF
1.39 pazsan 274: dodefer: OF >body POSTPONE lit-perform , EXIT
1.35 anton 275: ENDOF
1.39 pazsan 276: dofield: OF >body @ POSTPONE lit+ , EXIT ENDOF
1.35 anton 277: ENDCASE
1.40 ! anton 278: static-compile, ;
1.35 anton 279:
280: ' compile-to-prims, IS compile,
1.36 pazsan 281: [ELSE]
282: ' , is compile,
283: [THEN]
1.34 anton 284:
1.1 pazsan 285: : !does ( addr -- ) \ gforth store-does
286: lastxt does-code! ;
287:
288: : (does>) ( R: addr -- )
289: r> cfaligned /does-handler + !does ;
290:
291: : dodoes, ( -- )
292: cfalign here /does-handler allot does-handler! ;
293:
294: : (compile) ( -- ) \ gforth
295: r> dup cell+ >r @ compile, ;
296:
297: \ \ ticks
298:
299: : name>comp ( nt -- w xt ) \ gforth
1.15 crook 300: \G @i{w xt} is the compilation token for the word @i{nt}.
1.1 pazsan 301: (name>comp)
302: 1 = if
303: ['] execute
304: else
305: ['] compile,
306: then ;
307:
308: : [(')] ( compilation "name" -- ; run-time -- nt ) \ gforth bracket-paren-tick
309: (') postpone ALiteral ; immediate restrict
310:
311: : ['] ( compilation. "name" -- ; run-time. -- xt ) \ core bracket-tick
1.15 crook 312: \g @i{xt} represents @i{name}'s interpretation
313: \g semantics. Perform @code{-14 throw} if the word has no
1.1 pazsan 314: \g interpretation semantics.
315: ' postpone ALiteral ; immediate restrict
316:
1.5 anton 317: : COMP' ( "name" -- w xt ) \ gforth comp-tick
1.15 crook 318: \g Compilation token @i{w xt} represents @i{name}'s compilation semantics.
1.1 pazsan 319: (') name>comp ;
320:
321: : [COMP'] ( compilation "name" -- ; run-time -- w xt ) \ gforth bracket-comp-tick
1.15 crook 322: \g Compilation token @i{w xt} represents @i{name}'s compilation semantics.
1.1 pazsan 323: COMP' swap POSTPONE Aliteral POSTPONE ALiteral ; immediate restrict
324:
1.18 jwilke 325: : postpone, ( w xt -- ) \ gforth postpone-comma
1.26 anton 326: \g Compile the compilation semantics represented by the
327: \g compilation token @i{w xt}.
1.18 jwilke 328: dup ['] execute =
329: if
330: drop compile,
331: else
332: dup ['] compile, =
333: if
334: drop POSTPONE (compile) a,
335: else
336: swap POSTPONE aliteral compile,
337: then
338: then ;
339:
340: : POSTPONE ( "name" -- ) \ core
341: \g Compiles the compilation semantics of @i{name}.
342: COMP' postpone, ; immediate restrict
343:
1.1 pazsan 344: \ \ recurse 17may93jaw
345:
346: : recurse ( compilation -- ; run-time ?? -- ?? ) \ core
1.10 crook 347: \g Call the current definition.
1.1 pazsan 348: lastxt compile, ; immediate restrict
349:
350: \ \ compiler loop
351:
352: : compiler ( c-addr u -- )
353: 2dup find-name dup
354: if ( c-addr u nt )
355: nip nip name>comp execute
356: else
357: drop
358: 2dup snumber? dup
359: IF
360: 0>
361: IF
362: swap postpone Literal
363: THEN
364: postpone Literal
365: 2drop
366: ELSE
367: drop compiler-notfound
368: THEN
369: then ;
370:
1.22 crook 371: : [ ( -- ) \ core left-bracket
1.8 crook 372: \G Enter interpretation state. Immediate word.
1.1 pazsan 373: ['] interpreter IS parser state off ; immediate
374:
375: : ] ( -- ) \ core right-bracket
1.8 crook 376: \G Enter compilation state.
1.1 pazsan 377: ['] compiler IS parser state on ;
378:
379: \ \ Strings 22feb93py
380:
381: : ," ( "string"<"> -- ) [char] " parse
382: here over char+ allot place align ;
383:
384: : SLiteral ( Compilation c-addr1 u ; run-time -- c-addr2 u ) \ string
1.15 crook 385: \G Compilation: compile the string specified by @i{c-addr1},
386: \G @i{u} into the current definition. Run-time: return
387: \G @i{c-addr2 u} describing the address and length of the
1.10 crook 388: \G string.
1.1 pazsan 389: postpone (S") here over char+ allot place align ;
390: immediate restrict
391:
392: \ \ abort" 22feb93py
393:
394: : abort" ( compilation 'ccc"' -- ; run-time f -- ) \ core,exception-ext abort-quote
1.15 crook 395: \G If any bit of @i{f} is non-zero, perform the function of @code{-2 throw},
396: \G displaying the string @i{ccc} if there is no exception frame on the
1.10 crook 397: \G exception stack.
1.1 pazsan 398: postpone (abort") ," ; immediate restrict
399:
400: \ \ Header states 23feb93py
401:
402: : cset ( bmask c-addr -- )
1.30 anton 403: tuck @ or swap ! ;
1.1 pazsan 404:
405: : creset ( bmask c-addr -- )
1.30 anton 406: tuck @ swap invert and swap ! ;
1.1 pazsan 407:
408: : ctoggle ( bmask c-addr -- )
1.30 anton 409: tuck @ xor swap ! ;
1.1 pazsan 410:
411: : lastflags ( -- c-addr )
412: \ the address of the flags byte in the last header
413: \ aborts if the last defined word was headerless
414: last @ dup 0= abort" last word was headerless" cell+ ;
415:
416: : immediate ( -- ) \ core
1.10 crook 417: \G Make the compilation semantics of a word be to @code{execute}
418: \G the execution semantics.
1.1 pazsan 419: immediate-mask lastflags cset ;
420:
421: : restrict ( -- ) \ gforth
1.10 crook 422: \G A synonym for @code{compile-only}
1.1 pazsan 423: restrict-mask lastflags cset ;
1.18 jwilke 424:
1.1 pazsan 425: ' restrict alias compile-only ( -- ) \ gforth
1.10 crook 426: \G Remove the interpretation semantics of a word.
1.1 pazsan 427:
428: \ \ Create Variable User Constant 17mar93py
429:
1.15 crook 430: : Alias ( xt "name" -- ) \ gforth
1.1 pazsan 431: Header reveal
432: alias-mask lastflags creset
433: dup A, lastcfa ! ;
434:
435: doer? :dovar [IF]
436:
437: : Create ( "name" -- ) \ core
438: Header reveal dovar: cfa, ;
439: [ELSE]
440:
441: : Create ( "name" -- ) \ core
442: Header reveal here lastcfa ! 0 A, 0 , DOES> ;
443: [THEN]
444:
445: : Variable ( "name" -- ) \ core
446: Create 0 , ;
447:
448: : AVariable ( "name" -- ) \ gforth
449: Create 0 A, ;
450:
1.22 crook 451: : 2Variable ( "name" -- ) \ double two-variable
1.1 pazsan 452: create 0 , 0 , ;
453:
1.21 crook 454: : uallot ( n -- ) \ gforth
455: udp @ swap udp +! ;
1.1 pazsan 456:
457: doer? :douser [IF]
458:
459: : User ( "name" -- ) \ gforth
460: Header reveal douser: cfa, cell uallot , ;
461:
462: : AUser ( "name" -- ) \ gforth
463: User ;
464: [ELSE]
465:
466: : User Create cell uallot , DOES> @ up @ + ;
467:
468: : AUser User ;
469: [THEN]
470:
471: doer? :docon [IF]
472: : (Constant) Header reveal docon: cfa, ;
473: [ELSE]
474: : (Constant) Create DOES> @ ;
475: [THEN]
476:
477: : Constant ( w "name" -- ) \ core
1.15 crook 478: \G Define a constant @i{name} with value @i{w}.
1.1 pazsan 479: \G
1.15 crook 480: \G @i{name} execution: @i{-- w}
1.1 pazsan 481: (Constant) , ;
482:
483: : AConstant ( addr "name" -- ) \ gforth
484: (Constant) A, ;
485:
486: : Value ( w "name" -- ) \ core-ext
487: (Constant) , ;
488:
1.37 jwilke 489: : AValue ( w "name" -- ) \ core-ext
490: (Constant) A, ;
491:
1.22 crook 492: : 2Constant ( w1 w2 "name" -- ) \ double two-constant
1.1 pazsan 493: Create ( w1 w2 "name" -- )
494: 2,
495: DOES> ( -- w1 w2 )
496: 2@ ;
497:
498: doer? :dofield [IF]
499: : (Field) Header reveal dofield: cfa, ;
500: [ELSE]
501: : (Field) Create DOES> @ + ;
502: [THEN]
1.39 pazsan 503:
504: \ \ interpret/compile:
505:
506: struct
507: >body
508: cell% field interpret/compile-int
509: cell% field interpret/compile-comp
510: end-struct interpret/compile-struct
511:
512: : interpret/compile: ( interp-xt comp-xt "name" -- ) \ gforth
513: Create immediate swap A, A,
514: DOES>
515: abort" executed primary cfa of an interpret/compile: word" ;
516: \ state @ IF cell+ THEN perform ;
517:
1.1 pazsan 518: \ IS Defer What's Defers TO 24feb93py
519:
520: doer? :dodefer [IF]
521:
522: : Defer ( "name" -- ) \ gforth
523: \ !! shouldn't it be initialized with abort or something similar?
524: Header Reveal dodefer: cfa,
525: ['] noop A, ;
1.18 jwilke 526:
1.1 pazsan 527: [ELSE]
528:
529: : Defer ( "name" -- ) \ gforth
530: Create ['] noop A,
531: DOES> @ execute ;
1.18 jwilke 532:
1.1 pazsan 533: [THEN]
534:
1.25 anton 535: : Defers ( compilation "name" -- ; run-time ... -- ... ) \ gforth
536: \G Compiles the present contents of the deferred word @i{name}
537: \G into the current definition. I.e., this produces static
538: \G binding as if @i{name} was not deferred.
1.1 pazsan 539: ' >body @ compile, ; immediate
1.18 jwilke 540:
541: :noname
542: dodoes, here !does ]
543: defstart :-hook ;
544: :noname
545: ;-hook ?struc
546: [ has? xconds [IF] ] exit-like [ [THEN] ]
547: postpone (does>) dodoes,
548: defstart :-hook ;
549: interpret/compile: DOES> ( compilation colon-sys1 -- colon-sys2 ; run-time nest-sys -- ) \ core does
550:
1.20 anton 551: : <IS> ( "name" xt -- ) \ gforth
552: \g Changes the @code{defer}red word @var{name} to execute @var{xt}.
553: ' >body ! ;
554:
555: : [IS] ( compilation "name" -- ; run-time xt -- ) \ gforth bracket-is
556: \g At run-time, changes the @code{defer}red word @var{name} to
557: \g execute @var{xt}.
1.18 jwilke 558: ' >body postpone ALiteral postpone ! ; immediate restrict
559:
1.20 anton 560: ' <IS>
1.18 jwilke 561: ' [IS]
562: interpret/compile: IS ( xt "name" -- ) \ gforth
1.21 crook 563: \G A combined word made up from @code{<IS>} and @code{[IS]}.
1.18 jwilke 564:
1.20 anton 565: ' <IS>
566: ' [IS]
567: interpret/compile: TO ( w "name" -- ) \ core-ext
1.18 jwilke 568:
569: :noname ' >body @ ;
570: :noname ' >body postpone ALiteral postpone @ ;
1.25 anton 571: interpret/compile: What's ( interpretation "name" -- xt; compilation "name" -- ; run-time -- xt ) \ gforth
572: \G @i{Xt} is the XT that is currently assigned to @i{name}.
1.18 jwilke 573:
574: : interpret/compile? ( xt -- flag )
575: >does-code ['] DOES> >does-code = ;
1.1 pazsan 576:
577: \ \ : ; 24feb93py
578:
579: defer :-hook ( sys1 -- sys2 )
580:
581: defer ;-hook ( sys2 -- sys1 )
582:
1.16 jwilke 583: 0 Constant defstart
584:
1.14 jwilke 585: [IFDEF] docol,
586: : (:noname) ( -- colon-sys )
587: \ common factor of : and :noname
1.34 anton 588: docol, ]comp
1.14 jwilke 589: [ELSE]
1.7 anton 590: : (:noname) ( -- colon-sys )
591: \ common factor of : and :noname
1.34 anton 592: docol: cfa,
1.14 jwilke 593: [THEN]
1.40 ! anton 594: defstart ] :-hook ;
1.7 anton 595:
1.1 pazsan 596: : : ( "name" -- colon-sys ) \ core colon
1.7 anton 597: Header (:noname) ;
598:
599: : :noname ( -- xt colon-sys ) \ core-ext colon-no-name
600: 0 last !
601: cfalign here (:noname) ;
1.1 pazsan 602:
1.14 jwilke 603: [IFDEF] fini,
604: : ; ( compilation colon-sys -- ; run-time nest-sys ) \ core semicolon
605: ;-hook ?struc fini, comp[ reveal postpone [ ; immediate restrict
606: [ELSE]
1.1 pazsan 607: : ; ( compilation colon-sys -- ; run-time nest-sys ) \ core semicolon
1.37 jwilke 608: ;-hook ?struc [compile] exit reveal postpone [ ; immediate restrict
1.14 jwilke 609: [THEN]
1.1 pazsan 610:
611: \ \ Search list handling: reveal words, recursive 23feb93py
612:
613: : last? ( -- false / nfa nfa )
614: last @ ?dup ;
615:
616: : (reveal) ( nt wid -- )
1.3 pazsan 617: wordlist-id dup >r
1.1 pazsan 618: @ over ( name>link ) !
619: r> ! ;
620:
621: \ make entry in wordlist-map
622: ' (reveal) f83search reveal-method !
623:
624: Variable warnings ( -- addr ) \ gforth
625: G -1 warnings T !
626:
627: : check-shadow ( addr count wid -- )
1.2 pazsan 628: \G prints a warning if the string is already present in the wordlist
629: >r 2dup 2dup r> (search-wordlist) warnings @ and ?dup if
630: >stderr
631: ." redefined " name>string 2dup type
632: compare 0<> if
633: ." with " type
634: else
635: 2drop
636: then
637: space space EXIT
638: then
639: 2drop 2drop ;
1.1 pazsan 640:
641: : reveal ( -- ) \ gforth
642: last?
643: if \ the last word has a header
644: dup ( name>link ) @ 1 and
645: if \ it is still hidden
646: dup ( name>link ) @ 1 xor ( nt wid )
647: 2dup >r name>string r> check-shadow ( nt wid )
648: dup wordlist-map @ reveal-method perform
649: else
650: drop
651: then
652: then ;
653:
654: : rehash ( wid -- )
655: dup wordlist-map @ rehash-method perform ;
656:
657: ' reveal alias recursive ( compilation -- ; run-time -- ) \ gforth
1.10 crook 658: \g Make the current definition visible, enabling it to call itself
1.1 pazsan 659: \g recursively.
660: immediate restrict
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