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Thu May 9 18:13:00 1996 UTC
(23 years, 2 months ago) by anton
CVS tags: HEAD
changed most state-smart words into words with interpretation: behaviour.
added postponetest.fs to "make test"
made HashTable into a value (for speed)
replaced 'flag!' by lastflags, cset, creset, ctoggle
\ Interpretation semantics
\ Copyright (C) 1996 Free Software Foundation, Inc.
\ This file is part of Gforth.
\ Gforth is free software; you can redistribute it and/or
\ modify it under the terms of the GNU General Public License
\ as published by the Free Software Foundation; either version 2
\ of the License, or (at your option) any later version.
\ This program is distributed in the hope that it will be useful,
\ but WITHOUT ANY WARRANTY; without even the implied warranty of
\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
\ GNU General Public License for more details.
\ You should have received a copy of the GNU General Public License
\ along with this program; if not, write to the Free Software
\ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
\ This file defines a mechanism for specifying special interpretation
\ semantics and the interpretation semantics of several words.
table constant interpretation-semantics
:noname ( c-addr u word-ident -- )
\ word-ident is currently an xt, but it might be the nfa
sp@ cell interpretation-semantics search-wordlist
if ( c-addr u word-ident xt )
nip nip nip execute
' interpret-special >body !
: interpretation: ( -- colon-sys ) \ gforth
\G make the last word one with special interpretation semantics and
\G start the (colon) definition of these semantics.
\ !! fix reveal such that it is not necessary to do it before the
lastcfa cell nextname \ !! use nfa instead of cfa
interpretation-semantics set-current : reveal
r> set-current ;
\ !! split notfound and sfnumber in a compiler and an interpreter part?
\ ' [']
\ !! or keep it state-smart?
' [char] Alias Ascii immediate
interpretation: ( "char" -- c )
\ currently also the interpretation semantics of [char]
\ the following interpretation semantics definitions restrict the
\ preceeding word. However, this does not matter because these
\ restricted words are in interpretation-semantics and are never
\ interpreted like regular words.
\ we cannot use s" interpretively yet (to make a string for (sfind), so:
' S" lastcfa !
interpretation: ( "ccc<">" -- c-addr u )
[char] " parse
/line min >r s"-buffer r@ cmove
s"-buffer r> ;
' ." lastcfa !
interpretation: ( "ccc<">" -- )
[char] " parse type ;
' does> lastcfa !
interpretation: ( -- colon-sys ) ( name execution: -- addr )
align dodoes, here !does ]
defstart :-hook ;
' is lastcfa !
interpretation: ( addr "name" -- )
' >body ! ;
' what's lastcfa !
interpretation: ( "name" -- addr )
' >body @ ;
\ : foo
\ ." compilation semantics" ; immediate
\ ." interpretation semantics" ;
\ foo \ interpretation semantics ok
\ : xxx foo ; \ compilation semantics ok
\ : yyy postpone foo ; \ ok
\ yyy \ compilation semantics ok