Powered by ViewCVS 1.0-dev
| 1 : | pazsan | 1.1 | \ compiler definitions 14sep97jaw |
| 2 : | |||
| 3 : | anton | 1.28 | \ Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc. |
| 4 : | anton | 1.6 | |
| 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 : | anton | 1.29 | \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
| 20 : | anton | 1.6 | |
| 21 : | pazsan | 1.1 | \ \ Revisions-Log |
| 22 : | |||
| 23 : | \ put in seperate file 14sep97jaw | ||
| 24 : | |||
| 25 : | \ \ here allot , c, A, 17dec92py | ||
| 26 : | |||
| 27 : | jwilke | 1.14 | [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 | ||
| 37 : | pazsan | 1.1 | : allot ( n -- ) \ core |
| 38 : | anton | 1.23 | \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. | ||
| 44 : | anton | 1.12 | here + |
| 45 : | dup 1- usable-dictionary-end forthstart within -8 and throw | ||
| 46 : | dp ! ; | ||
| 47 : | jwilke | 1.14 | [THEN] |
| 48 : | pazsan | 1.1 | |
| 49 : | crook | 1.22 | : c, ( c -- ) \ core c-comma |
| 50 : | crook | 1.15 | \G Reserve data space for one char and store @i{c} in the space. |
| 51 : | pazsan | 1.1 | here 1 chars allot c! ; |
| 52 : | |||
| 53 : | crook | 1.22 | : , ( w -- ) \ core comma |
| 54 : | crook | 1.15 | \G Reserve data space for one cell and store @i{w} in the space. |
| 55 : | pazsan | 1.1 | here cell allot ! ; |
| 56 : | |||
| 57 : | : 2, ( w1 w2 -- ) \ gforth | ||
| 58 : | crook | 1.15 | \G Reserve data space for two cells and store the double @i{w1 |
| 59 : | anton | 1.24 | \G w2} there, @i{w2} first (lower address). |
| 60 : | pazsan | 1.1 | here 2 cells allot 2! ; |
| 61 : | |||
| 62 : | \ : aligned ( addr -- addr' ) \ core | ||
| 63 : | \ [ cell 1- ] Literal + [ -1 cells ] Literal and ; | ||
| 64 : | |||
| 65 : | : align ( -- ) \ core | ||
| 66 : | crook | 1.15 | \G If the data-space pointer is not aligned, reserve enough space to align it. |
| 67 : | pazsan | 1.1 | here dup aligned swap ?DO bl c, LOOP ; |
| 68 : | |||
| 69 : | crook | 1.22 | \ : faligned ( addr -- f-addr ) \ float f-aligned |
| 70 : | pazsan | 1.1 | \ [ 1 floats 1- ] Literal + [ -1 floats ] Literal and ; |
| 71 : | |||
| 72 : | crook | 1.22 | : falign ( -- ) \ float f-align |
| 73 : | crook | 1.15 | \G If the data-space pointer is not float-aligned, reserve |
| 74 : | \G enough space to align it. | ||
| 75 : | pazsan | 1.1 | here dup faligned swap |
| 76 : | ?DO | ||
| 77 : | bl c, | ||
| 78 : | LOOP ; | ||
| 79 : | |||
| 80 : | anton | 1.9 | : maxalign ( -- ) \ gforth |
| 81 : | anton | 1.23 | \G Align data-space pointer for all alignment requirements. |
| 82 : | pazsan | 1.1 | 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 | ||
| 89 : | anton | 1.24 | \G Align data-space pointer for code field requirements (i.e., such |
| 90 : | \G that the corresponding body is maxaligned). | ||
| 91 : | pazsan | 1.1 | |
| 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 : | |||
| 110 : | anton | 1.30 | : longstring, ( c-addr u -- ) \ gforth |
| 111 : | \G puts down string as cstring | ||
| 112 : | dup , here swap chars dup allot move ; | ||
| 113 : | |||
| 114 : | pazsan | 1.1 | : 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 | ||
| 119 : | anton | 1.30 | longstring, cfalign |
| 120 : | pazsan | 1.1 | 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 : | |||
| 131 : | anton | 1.32 | 2variable nextname-string |
| 132 : | pazsan | 1.1 | |
| 133 : | pazsan | 1.33 | has? OS [IF] |
| 134 : | pazsan | 1.1 | : nextname-header ( -- ) |
| 135 : | anton | 1.32 | nextname-string 2@ header, |
| 136 : | nextname-string free-mem-var | ||
| 137 : | pazsan | 1.1 | input-stream ; |
| 138 : | pazsan | 1.33 | [THEN] |
| 139 : | pazsan | 1.1 | |
| 140 : | \ the next name is given in the string | ||
| 141 : | |||
| 142 : | pazsan | 1.33 | has? OS [IF] |
| 143 : | pazsan | 1.1 | : nextname ( c-addr u -- ) \ gforth |
| 144 : | anton | 1.19 | \g The next defined word will have the name @var{c-addr u}; the |
| 145 : | \g defining word will leave the input stream alone. | ||
| 146 : | pazsan | 1.1 | name-too-long? |
| 147 : | anton | 1.32 | nextname-string free-mem-var |
| 148 : | save-mem nextname-string 2! | ||
| 149 : | pazsan | 1.1 | ['] nextname-header IS (header) ; |
| 150 : | pazsan | 1.33 | [THEN] |
| 151 : | pazsan | 1.1 | |
| 152 : | : noname-header ( -- ) | ||
| 153 : | 0 last ! cfalign | ||
| 154 : | input-stream ; | ||
| 155 : | |||
| 156 : | : noname ( -- ) \ gforth | ||
| 157 : | anton | 1.19 | \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}. | ||
| 160 : | pazsan | 1.1 | ['] noname-header IS (header) ; |
| 161 : | |||
| 162 : | : lastxt ( -- xt ) \ gforth | ||
| 163 : | crook | 1.15 | \G @i{xt} is the execution token of the last word defined. |
| 164 : | crook | 1.13 | \ The main purpose of this word is to get the xt of words defined using noname |
| 165 : | pazsan | 1.1 | lastcfa @ ; |
| 166 : | |||
| 167 : | \ \ literals 17dec92py | ||
| 168 : | |||
| 169 : | : Literal ( compilation n -- ; run-time -- n ) \ core | ||
| 170 : | anton | 1.27 | \G Compilation semantics: compile the run-time semantics.@* |
| 171 : | \G Run-time Semantics: push @i{n}.@* | ||
| 172 : | \G Interpretation semantics: undefined. | ||
| 173 : | jwilke | 1.14 | [ [IFDEF] lit, ] |
| 174 : | lit, | ||
| 175 : | [ [ELSE] ] | ||
| 176 : | anton | 1.27 | postpone lit , |
| 177 : | jwilke | 1.14 | [ [THEN] ] ; immediate restrict |
| 178 : | pazsan | 1.1 | |
| 179 : | : ALiteral ( compilation addr -- ; run-time -- addr ) \ gforth | ||
| 180 : | jwilke | 1.14 | [ [IFDEF] alit, ] |
| 181 : | alit, | ||
| 182 : | [ [ELSE] ] | ||
| 183 : | postpone lit A, | ||
| 184 : | [ [THEN] ] ; immediate restrict | ||
| 185 : | pazsan | 1.1 | |
| 186 : | crook | 1.8 | : char ( '<spaces>ccc' -- c ) \ core |
| 187 : | crook | 1.15 | \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}. | ||
| 189 : | pazsan | 1.1 | bl word char+ c@ ; |
| 190 : | |||
| 191 : | crook | 1.8 | : [char] ( compilation '<spaces>ccc' -- ; run-time -- c ) \ core bracket-char |
| 192 : | crook | 1.10 | \G Compilation: skip leading spaces. Parse the string |
| 193 : | crook | 1.15 | \G @i{ccc}. Run-time: return @i{c}, the display code |
| 194 : | \G representing the first character of @i{ccc}. Interpretation | ||
| 195 : | crook | 1.10 | \G semantics for this word are undefined. |
| 196 : | pazsan | 1.1 | 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 : | |||
| 205 : | jwilke | 1.14 | [IFUNDEF] compile, |
| 206 : | anton | 1.34 | 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, | ||
| 211 : | jwilke | 1.14 | [THEN] |
| 212 : | pazsan | 1.1 | |
| 213 : | anton | 1.34 | : 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 : | |||
| 222 : | ' peephole-compile, IS compile, | ||
| 223 : | |||
| 224 : | pazsan | 1.1 | : !does ( addr -- ) \ gforth store-does |
| 225 : | lastxt does-code! ; | ||
| 226 : | |||
| 227 : | : (does>) ( R: addr -- ) | ||
| 228 : | r> cfaligned /does-handler + !does ; | ||
| 229 : | |||
| 230 : | : dodoes, ( -- ) | ||
| 231 : | cfalign here /does-handler allot does-handler! ; | ||
| 232 : | |||
| 233 : | : (compile) ( -- ) \ gforth | ||
| 234 : | r> dup cell+ >r @ compile, ; | ||
| 235 : | |||
| 236 : | \ \ ticks | ||
| 237 : | |||
| 238 : | : name>comp ( nt -- w xt ) \ gforth | ||
| 239 : | crook | 1.15 | \G @i{w xt} is the compilation token for the word @i{nt}. |
| 240 : | pazsan | 1.1 | (name>comp) |
| 241 : | 1 = if | ||
| 242 : | ['] execute | ||
| 243 : | else | ||
| 244 : | ['] compile, | ||
| 245 : | then ; | ||
| 246 : | |||
| 247 : | : [(')] ( compilation "name" -- ; run-time -- nt ) \ gforth bracket-paren-tick | ||
| 248 : | (') postpone ALiteral ; immediate restrict | ||
| 249 : | |||
| 250 : | : ['] ( compilation. "name" -- ; run-time. -- xt ) \ core bracket-tick | ||
| 251 : | crook | 1.15 | \g @i{xt} represents @i{name}'s interpretation |
| 252 : | \g semantics. Perform @code{-14 throw} if the word has no | ||
| 253 : | pazsan | 1.1 | \g interpretation semantics. |
| 254 : | ' postpone ALiteral ; immediate restrict | ||
| 255 : | |||
| 256 : | anton | 1.5 | : COMP' ( "name" -- w xt ) \ gforth comp-tick |
| 257 : | crook | 1.15 | \g Compilation token @i{w xt} represents @i{name}'s compilation semantics. |
| 258 : | pazsan | 1.1 | (') name>comp ; |
| 259 : | |||
| 260 : | : [COMP'] ( compilation "name" -- ; run-time -- w xt ) \ gforth bracket-comp-tick | ||
| 261 : | crook | 1.15 | \g Compilation token @i{w xt} represents @i{name}'s compilation semantics. |
| 262 : | pazsan | 1.1 | COMP' swap POSTPONE Aliteral POSTPONE ALiteral ; immediate restrict |
| 263 : | |||
| 264 : | jwilke | 1.18 | : postpone, ( w xt -- ) \ gforth postpone-comma |
| 265 : | anton | 1.26 | \g Compile the compilation semantics represented by the |
| 266 : | \g compilation token @i{w xt}. | ||
| 267 : | jwilke | 1.18 | dup ['] execute = |
| 268 : | if | ||
| 269 : | drop compile, | ||
| 270 : | else | ||
| 271 : | dup ['] compile, = | ||
| 272 : | if | ||
| 273 : | drop POSTPONE (compile) a, | ||
| 274 : | else | ||
| 275 : | swap POSTPONE aliteral compile, | ||
| 276 : | then | ||
| 277 : | then ; | ||
| 278 : | |||
| 279 : | : POSTPONE ( "name" -- ) \ core | ||
| 280 : | \g Compiles the compilation semantics of @i{name}. | ||
| 281 : | COMP' postpone, ; immediate restrict | ||
| 282 : | |||
| 283 : | pazsan | 1.1 | \ \ recurse 17may93jaw |
| 284 : | |||
| 285 : | : recurse ( compilation -- ; run-time ?? -- ?? ) \ core | ||
| 286 : | crook | 1.10 | \g Call the current definition. |
| 287 : | pazsan | 1.1 | lastxt compile, ; immediate restrict |
| 288 : | |||
| 289 : | \ \ compiler loop | ||
| 290 : | |||
| 291 : | : compiler ( c-addr u -- ) | ||
| 292 : | 2dup find-name dup | ||
| 293 : | if ( c-addr u nt ) | ||
| 294 : | nip nip name>comp execute | ||
| 295 : | else | ||
| 296 : | drop | ||
| 297 : | 2dup snumber? dup | ||
| 298 : | IF | ||
| 299 : | 0> | ||
| 300 : | IF | ||
| 301 : | swap postpone Literal | ||
| 302 : | THEN | ||
| 303 : | postpone Literal | ||
| 304 : | 2drop | ||
| 305 : | ELSE | ||
| 306 : | drop compiler-notfound | ||
| 307 : | THEN | ||
| 308 : | then ; | ||
| 309 : | |||
| 310 : | crook | 1.22 | : [ ( -- ) \ core left-bracket |
| 311 : | crook | 1.8 | \G Enter interpretation state. Immediate word. |
| 312 : | pazsan | 1.1 | ['] interpreter IS parser state off ; immediate |
| 313 : | |||
| 314 : | : ] ( -- ) \ core right-bracket | ||
| 315 : | crook | 1.8 | \G Enter compilation state. |
| 316 : | pazsan | 1.1 | ['] compiler IS parser state on ; |
| 317 : | |||
| 318 : | \ \ Strings 22feb93py | ||
| 319 : | |||
| 320 : | : ," ( "string"<"> -- ) [char] " parse | ||
| 321 : | here over char+ allot place align ; | ||
| 322 : | |||
| 323 : | : SLiteral ( Compilation c-addr1 u ; run-time -- c-addr2 u ) \ string | ||
| 324 : | crook | 1.15 | \G Compilation: compile the string specified by @i{c-addr1}, |
| 325 : | \G @i{u} into the current definition. Run-time: return | ||
| 326 : | \G @i{c-addr2 u} describing the address and length of the | ||
| 327 : | crook | 1.10 | \G string. |
| 328 : | pazsan | 1.1 | postpone (S") here over char+ allot place align ; |
| 329 : | immediate restrict | ||
| 330 : | |||
| 331 : | \ \ abort" 22feb93py | ||
| 332 : | |||
| 333 : | : abort" ( compilation 'ccc"' -- ; run-time f -- ) \ core,exception-ext abort-quote | ||
| 334 : | crook | 1.15 | \G If any bit of @i{f} is non-zero, perform the function of @code{-2 throw}, |
| 335 : | \G displaying the string @i{ccc} if there is no exception frame on the | ||
| 336 : | crook | 1.10 | \G exception stack. |
| 337 : | pazsan | 1.1 | postpone (abort") ," ; immediate restrict |
| 338 : | |||
| 339 : | \ \ Header states 23feb93py | ||
| 340 : | |||
| 341 : | : cset ( bmask c-addr -- ) | ||
| 342 : | anton | 1.30 | tuck @ or swap ! ; |
| 343 : | pazsan | 1.1 | |
| 344 : | : creset ( bmask c-addr -- ) | ||
| 345 : | anton | 1.30 | tuck @ swap invert and swap ! ; |
| 346 : | pazsan | 1.1 | |
| 347 : | : ctoggle ( bmask c-addr -- ) | ||
| 348 : | anton | 1.30 | tuck @ xor swap ! ; |
| 349 : | pazsan | 1.1 | |
| 350 : | : lastflags ( -- c-addr ) | ||
| 351 : | \ the address of the flags byte in the last header | ||
| 352 : | \ aborts if the last defined word was headerless | ||
| 353 : | last @ dup 0= abort" last word was headerless" cell+ ; | ||
| 354 : | |||
| 355 : | : immediate ( -- ) \ core | ||
| 356 : | crook | 1.10 | \G Make the compilation semantics of a word be to @code{execute} |
| 357 : | \G the execution semantics. | ||
| 358 : | pazsan | 1.1 | immediate-mask lastflags cset ; |
| 359 : | |||
| 360 : | : restrict ( -- ) \ gforth | ||
| 361 : | crook | 1.10 | \G A synonym for @code{compile-only} |
| 362 : | pazsan | 1.1 | restrict-mask lastflags cset ; |
| 363 : | jwilke | 1.18 | |
| 364 : | pazsan | 1.1 | ' restrict alias compile-only ( -- ) \ gforth |
| 365 : | crook | 1.10 | \G Remove the interpretation semantics of a word. |
| 366 : | pazsan | 1.1 | |
| 367 : | \ \ Create Variable User Constant 17mar93py | ||
| 368 : | |||
| 369 : | crook | 1.15 | : Alias ( xt "name" -- ) \ gforth |
| 370 : | pazsan | 1.1 | Header reveal |
| 371 : | alias-mask lastflags creset | ||
| 372 : | dup A, lastcfa ! ; | ||
| 373 : | |||
| 374 : | doer? :dovar [IF] | ||
| 375 : | |||
| 376 : | : Create ( "name" -- ) \ core | ||
| 377 : | Header reveal dovar: cfa, ; | ||
| 378 : | [ELSE] | ||
| 379 : | |||
| 380 : | : Create ( "name" -- ) \ core | ||
| 381 : | Header reveal here lastcfa ! 0 A, 0 , DOES> ; | ||
| 382 : | [THEN] | ||
| 383 : | |||
| 384 : | : Variable ( "name" -- ) \ core | ||
| 385 : | Create 0 , ; | ||
| 386 : | |||
| 387 : | : AVariable ( "name" -- ) \ gforth | ||
| 388 : | Create 0 A, ; | ||
| 389 : | |||
| 390 : | crook | 1.22 | : 2Variable ( "name" -- ) \ double two-variable |
| 391 : | pazsan | 1.1 | create 0 , 0 , ; |
| 392 : | |||
| 393 : | crook | 1.21 | : uallot ( n -- ) \ gforth |
| 394 : | udp @ swap udp +! ; | ||
| 395 : | pazsan | 1.1 | |
| 396 : | doer? :douser [IF] | ||
| 397 : | |||
| 398 : | : User ( "name" -- ) \ gforth | ||
| 399 : | Header reveal douser: cfa, cell uallot , ; | ||
| 400 : | |||
| 401 : | : AUser ( "name" -- ) \ gforth | ||
| 402 : | User ; | ||
| 403 : | [ELSE] | ||
| 404 : | |||
| 405 : | : User Create cell uallot , DOES> @ up @ + ; | ||
| 406 : | |||
| 407 : | : AUser User ; | ||
| 408 : | [THEN] | ||
| 409 : | |||
| 410 : | doer? :docon [IF] | ||
| 411 : | : (Constant) Header reveal docon: cfa, ; | ||
| 412 : | [ELSE] | ||
| 413 : | : (Constant) Create DOES> @ ; | ||
| 414 : | [THEN] | ||
| 415 : | |||
| 416 : | : Constant ( w "name" -- ) \ core | ||
| 417 : | crook | 1.15 | \G Define a constant @i{name} with value @i{w}. |
| 418 : | pazsan | 1.1 | \G |
| 419 : | crook | 1.15 | \G @i{name} execution: @i{-- w} |
| 420 : | pazsan | 1.1 | (Constant) , ; |
| 421 : | |||
| 422 : | : AConstant ( addr "name" -- ) \ gforth | ||
| 423 : | (Constant) A, ; | ||
| 424 : | |||
| 425 : | : Value ( w "name" -- ) \ core-ext | ||
| 426 : | (Constant) , ; | ||
| 427 : | |||
| 428 : | crook | 1.22 | : 2Constant ( w1 w2 "name" -- ) \ double two-constant |
| 429 : | pazsan | 1.1 | Create ( w1 w2 "name" -- ) |
| 430 : | 2, | ||
| 431 : | DOES> ( -- w1 w2 ) | ||
| 432 : | 2@ ; | ||
| 433 : | |||
| 434 : | doer? :dofield [IF] | ||
| 435 : | : (Field) Header reveal dofield: cfa, ; | ||
| 436 : | [ELSE] | ||
| 437 : | : (Field) Create DOES> @ + ; | ||
| 438 : | [THEN] | ||
| 439 : | \ IS Defer What's Defers TO 24feb93py | ||
| 440 : | |||
| 441 : | doer? :dodefer [IF] | ||
| 442 : | |||
| 443 : | : Defer ( "name" -- ) \ gforth | ||
| 444 : | \ !! shouldn't it be initialized with abort or something similar? | ||
| 445 : | Header Reveal dodefer: cfa, | ||
| 446 : | ['] noop A, ; | ||
| 447 : | jwilke | 1.18 | |
| 448 : | pazsan | 1.1 | [ELSE] |
| 449 : | |||
| 450 : | : Defer ( "name" -- ) \ gforth | ||
| 451 : | Create ['] noop A, | ||
| 452 : | DOES> @ execute ; | ||
| 453 : | jwilke | 1.18 | |
| 454 : | pazsan | 1.1 | [THEN] |
| 455 : | |||
| 456 : | anton | 1.25 | : Defers ( compilation "name" -- ; run-time ... -- ... ) \ gforth |
| 457 : | \G Compiles the present contents of the deferred word @i{name} | ||
| 458 : | \G into the current definition. I.e., this produces static | ||
| 459 : | \G binding as if @i{name} was not deferred. | ||
| 460 : | pazsan | 1.1 | ' >body @ compile, ; immediate |
| 461 : | jwilke | 1.18 | |
| 462 : | :noname | ||
| 463 : | dodoes, here !does ] | ||
| 464 : | defstart :-hook ; | ||
| 465 : | :noname | ||
| 466 : | ;-hook ?struc | ||
| 467 : | [ has? xconds [IF] ] exit-like [ [THEN] ] | ||
| 468 : | postpone (does>) dodoes, | ||
| 469 : | defstart :-hook ; | ||
| 470 : | interpret/compile: DOES> ( compilation colon-sys1 -- colon-sys2 ; run-time nest-sys -- ) \ core does | ||
| 471 : | |||
| 472 : | anton | 1.20 | : <IS> ( "name" xt -- ) \ gforth |
| 473 : | \g Changes the @code{defer}red word @var{name} to execute @var{xt}. | ||
| 474 : | ' >body ! ; | ||
| 475 : | |||
| 476 : | : [IS] ( compilation "name" -- ; run-time xt -- ) \ gforth bracket-is | ||
| 477 : | \g At run-time, changes the @code{defer}red word @var{name} to | ||
| 478 : | \g execute @var{xt}. | ||
| 479 : | jwilke | 1.18 | ' >body postpone ALiteral postpone ! ; immediate restrict |
| 480 : | |||
| 481 : | anton | 1.20 | ' <IS> |
| 482 : | jwilke | 1.18 | ' [IS] |
| 483 : | interpret/compile: IS ( xt "name" -- ) \ gforth | ||
| 484 : | crook | 1.21 | \G A combined word made up from @code{<IS>} and @code{[IS]}. |
| 485 : | jwilke | 1.18 | |
| 486 : | anton | 1.20 | ' <IS> |
| 487 : | ' [IS] | ||
| 488 : | interpret/compile: TO ( w "name" -- ) \ core-ext | ||
| 489 : | jwilke | 1.18 | |
| 490 : | :noname ' >body @ ; | ||
| 491 : | :noname ' >body postpone ALiteral postpone @ ; | ||
| 492 : | anton | 1.25 | interpret/compile: What's ( interpretation "name" -- xt; compilation "name" -- ; run-time -- xt ) \ gforth |
| 493 : | \G @i{Xt} is the XT that is currently assigned to @i{name}. | ||
| 494 : | jwilke | 1.18 | |
| 495 : | \ \ interpret/compile: | ||
| 496 : | |||
| 497 : | struct | ||
| 498 : | >body | ||
| 499 : | cell% field interpret/compile-int | ||
| 500 : | cell% field interpret/compile-comp | ||
| 501 : | end-struct interpret/compile-struct | ||
| 502 : | |||
| 503 : | : interpret/compile: ( interp-xt comp-xt "name" -- ) \ gforth | ||
| 504 : | Create immediate swap A, A, | ||
| 505 : | DOES> | ||
| 506 : | abort" executed primary cfa of an interpret/compile: word" ; | ||
| 507 : | \ state @ IF cell+ THEN perform ; | ||
| 508 : | |||
| 509 : | : interpret/compile? ( xt -- flag ) | ||
| 510 : | >does-code ['] DOES> >does-code = ; | ||
| 511 : | pazsan | 1.1 | |
| 512 : | \ \ : ; 24feb93py | ||
| 513 : | |||
| 514 : | defer :-hook ( sys1 -- sys2 ) | ||
| 515 : | |||
| 516 : | defer ;-hook ( sys2 -- sys1 ) | ||
| 517 : | |||
| 518 : | jwilke | 1.16 | 0 Constant defstart |
| 519 : | |||
| 520 : | jwilke | 1.14 | [IFDEF] docol, |
| 521 : | : (:noname) ( -- colon-sys ) | ||
| 522 : | \ common factor of : and :noname | ||
| 523 : | anton | 1.34 | docol, ]comp |
| 524 : | jwilke | 1.14 | [ELSE] |
| 525 : | anton | 1.7 | : (:noname) ( -- colon-sys ) |
| 526 : | \ common factor of : and :noname | ||
| 527 : | anton | 1.34 | docol: cfa, |
| 528 : | jwilke | 1.14 | [THEN] |
| 529 : | anton | 1.34 | 0 last-compiled ! defstart ] :-hook ; |
| 530 : | anton | 1.7 | |
| 531 : | pazsan | 1.1 | : : ( "name" -- colon-sys ) \ core colon |
| 532 : | anton | 1.7 | Header (:noname) ; |
| 533 : | |||
| 534 : | : :noname ( -- xt colon-sys ) \ core-ext colon-no-name | ||
| 535 : | 0 last ! | ||
| 536 : | cfalign here (:noname) ; | ||
| 537 : | pazsan | 1.1 | |
| 538 : | jwilke | 1.14 | [IFDEF] fini, |
| 539 : | : ; ( compilation colon-sys -- ; run-time nest-sys ) \ core semicolon | ||
| 540 : | ;-hook ?struc fini, comp[ reveal postpone [ ; immediate restrict | ||
| 541 : | [ELSE] | ||
| 542 : | pazsan | 1.1 | : ; ( compilation colon-sys -- ; run-time nest-sys ) \ core semicolon |
| 543 : | ;-hook ?struc postpone exit reveal postpone [ ; immediate restrict | ||
| 544 : | jwilke | 1.14 | [THEN] |
| 545 : | pazsan | 1.1 | |
| 546 : | \ \ Search list handling: reveal words, recursive 23feb93py | ||
| 547 : | |||
| 548 : | : last? ( -- false / nfa nfa ) | ||
| 549 : | last @ ?dup ; | ||
| 550 : | |||
| 551 : | : (reveal) ( nt wid -- ) | ||
| 552 : | pazsan | 1.3 | wordlist-id dup >r |
| 553 : | pazsan | 1.1 | @ over ( name>link ) ! |
| 554 : | r> ! ; | ||
| 555 : | |||
| 556 : | \ make entry in wordlist-map | ||
| 557 : | ' (reveal) f83search reveal-method ! | ||
| 558 : | |||
| 559 : | Variable warnings ( -- addr ) \ gforth | ||
| 560 : | G -1 warnings T ! | ||
| 561 : | |||
| 562 : | : check-shadow ( addr count wid -- ) | ||
| 563 : | pazsan | 1.2 | \G prints a warning if the string is already present in the wordlist |
| 564 : | >r 2dup 2dup r> (search-wordlist) warnings @ and ?dup if | ||
| 565 : | >stderr | ||
| 566 : | ." redefined " name>string 2dup type | ||
| 567 : | compare 0<> if | ||
| 568 : | ." with " type | ||
| 569 : | else | ||
| 570 : | 2drop | ||
| 571 : | then | ||
| 572 : | space space EXIT | ||
| 573 : | then | ||
| 574 : | 2drop 2drop ; | ||
| 575 : | pazsan | 1.1 | |
| 576 : | : reveal ( -- ) \ gforth | ||
| 577 : | last? | ||
| 578 : | if \ the last word has a header | ||
| 579 : | dup ( name>link ) @ 1 and | ||
| 580 : | if \ it is still hidden | ||
| 581 : | dup ( name>link ) @ 1 xor ( nt wid ) | ||
| 582 : | 2dup >r name>string r> check-shadow ( nt wid ) | ||
| 583 : | dup wordlist-map @ reveal-method perform | ||
| 584 : | else | ||
| 585 : | drop | ||
| 586 : | then | ||
| 587 : | then ; | ||
| 588 : | |||
| 589 : | : rehash ( wid -- ) | ||
| 590 : | dup wordlist-map @ rehash-method perform ; | ||
| 591 : | |||
| 592 : | ' reveal alias recursive ( compilation -- ; run-time -- ) \ gforth | ||
| 593 : | crook | 1.10 | \g Make the current definition visible, enabling it to call itself |
| 594 : | pazsan | 1.1 | \g recursively. |
| 595 : | immediate restrict |
|
CVS Admin Powered by ViewCVS 1.0-dev |
ViewCVS and CVS Help |