Annotation of gforth/kernel/special.fs, revision 1.8

1.1       anton       1: \ words with non-default and non-immediate compilation semantics
                      2: 
1.6       anton       3: \ Copyright (C) 1996,1998 Free Software Foundation, Inc.
1.1       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
                     19: \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
                     20: 
                     21: \ this file comes last, because these words override cross' words.
                     22: 
                     23: create s"-buffer /line chars allot
1.5       pazsan     24: has? compiler 0= 
1.4       jwilke     25: [IF] : s" [ELSE] :noname [THEN]
                     26:        [char] " parse
                     27:        /line min >r s"-buffer r@ cmove
                     28:        s"-buffer r> ;
1.5       pazsan     29: has? compiler [IF]
1.4       jwilke     30: :noname [char] " parse postpone SLiteral ;
1.1       anton      31: interpret/compile: S" ( compilation 'ccc"' -- ; run-time -- c-addr u ) \ core,file     s-quote
1.8     ! crook      32:   \G Compilation: Parse a string @var{ccc} delimited by a @code{"}
        !            33:   \G (double quote). At run-time, return the length, @var{u}, and the
        !            34:   \G start address, @var{c-addr} of the string. Interpretation: parse
        !            35:   \G the string as before, and return @var{c-addr}, @var{u}. The
        !            36:   \G string is stored in a temporary buffer which may be overwritten
        !            37:   \G by subsequent uses of @code{S"}.
1.4       jwilke     38: [THEN]
1.1       anton      39: 
1.5       pazsan     40: has? compiler [IF]
1.2       anton      41: : [IS] ( compilation "name" -- ; run-time xt -- ) \ possibly-gforth bracket-is
                     42:     ' >body postpone ALiteral postpone ! ; immediate restrict
                     43: 
1.1       anton      44: :noname    ' >body ! ;
1.2       anton      45: ' [IS]
1.1       anton      46: interpret/compile: IS ( addr "name" -- ) \ gforth
                     47: 
                     48: :noname    ' >body @ ;
                     49: :noname    ' >body postpone ALiteral postpone @ ;
                     50: interpret/compile: What's ( "name" -- addr ) \ gforth
                     51: 
                     52: :noname    [char] " parse type ;
                     53: :noname    postpone (.") ,"  align ;
                     54: interpret/compile: ." ( compilation 'ccc"' -- ; run-time -- )  \ core  dot-quote
1.8     ! crook      55:   \G Compilation: Parse a string @var{ccc} delimited by a " (double
        !            56:   \G quote). At run-time, display the string. Interpretation semantics
        !            57:   \G for this word are undefined in ANS Forth. Gforth's interpretation
        !            58:   \G semantics are to display the string. This is the simplest way to
        !            59:   \G display a string from within a definition; see examples below.
1.1       anton      60: 
                     61: \ DOES>                                                17mar93py
                     62: 
                     63: :noname
                     64:     dodoes, here !does ]
                     65:     defstart :-hook ;
                     66: :noname
                     67:     ;-hook postpone (does>) ?struc dodoes,
                     68:     defstart :-hook ;
                     69: interpret/compile: DOES>  ( compilation colon-sys1 -- colon-sys2 ; run-time nest-sys -- ) \ core       does
                     70:     
                     71: ' IS Alias TO ( addr "name" -- ) \ core-ext
                     72: immediate
                     73: 
1.4       jwilke     74: [THEN]
1.1       anton      75: 
1.5       pazsan     76: has? compiler [IF]
1.3       jwilke     77: : interpret/compile? ( xt -- flag )
                     78:     >does-code ['] S" >does-code = ;
1.5       pazsan     79: [ELSE]
                     80: : interpret/compile?
                     81:     false ;
                     82: [THEN]
1.3       jwilke     83: 

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