--- gforth/glocals.fs 1999/05/15 20:00:20 1.42 +++ gforth/glocals.fs 2007/07/06 12:54:56 1.58 @@ -1,6 +1,6 @@ \ A powerful locals implementation -\ Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc. +\ Copyright (C) 1995,1996,1997,1998,2000,2003,2004,2005 Free Software Foundation, Inc. \ This file is part of Gforth. @@ -16,7 +16,7 @@ \ 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. +\ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. \ More documentation can be found in the manual and in @@ -87,6 +87,7 @@ require search.fs require float.fs +require extend.fs \ for case : compile-@local ( n -- ) \ gforth compile-fetch-local case @@ -292,7 +293,7 @@ locals-types definitions postpone laddr# @ lp-offset, ; \ you may want to make comments in a locals definitions group: -' \ alias \ ( -- ) \ core-ext,block-ext backslash +' \ alias \ ( compilation 'ccc' -- ; run-time -- ) \ core-ext,block-ext backslash \G Comment till the end of the line if @code{BLK} contains 0 (i.e., \G while not loading a block), parse and discard the remainder of the \G parse area. Otherwise, parse and discard all subsequent characters @@ -309,22 +310,28 @@ immediate immediate forth definitions +also locals-types + +\ these "locals" are used for comparison in TO +c: some-clocal 2drop +d: some-dlocal 2drop +f: some-flocal 2drop +w: some-wlocal 2drop + \ the following gymnastics are for declaring locals without type specifier. \ we exploit a feature of our dictionary: every wordlist \ has it's own methods for finding words etc. \ So we create a vocabulary new-locals, that creates a 'w:' local named x \ when it is asked if it contains x. -also locals-types - : new-locals-find ( caddr u w -- nfa ) \ this is the find method of the new-locals vocabulary \ make a new local with name caddr u; w is ignored \ the returned nfa denotes a word that produces what W: produces \ !! do the whole thing without nextname drop nextname - ['] W: >name ; + ['] W: >head-noprim ; previous @@ -348,10 +355,10 @@ new-locals-map mappedwordlist Constant n variable old-dpp \ and now, finally, the user interface words -: { ( -- lastxt wid 0 ) \ gforth open-brace +: { ( -- latestxt wid 0 ) \ gforth open-brace dp old-dpp ! locals-dp dpp ! - lastxt get-current + latestxt get-current get-order new-locals-wl swap 1+ set-order also locals definitions locals-types 0 TO locals-wordlist @@ -359,7 +366,7 @@ variable old-dpp locals-types definitions -: } ( lastxt wid 0 a-addr1 xt1 ... -- ) \ gforth close-brace +: } ( latestxt wid 0 a-addr1 xt1 ... -- ) \ gforth close-brace \ ends locals definitions ] old-dpp @ dpp ! begin @@ -488,7 +495,7 @@ forth definitions : locals-:-hook ( sys -- sys addr xt n ) \ addr is the nfa of the defined word, xt its xt DEFERS :-hook - last @ lastcfa @ + latest latestxt clear-leave-stack 0 locals-size ! locals-buffer locals-dp ! @@ -631,10 +638,11 @@ forth definitions 2drop endif ; -: >definer ( xt -- definer ) - \ this gives a unique identifier for the way the xt was defined - \ words defined with different does>-codes have different definers - \ the definer can be used for comparison and in definer! +: >definer ( xt -- definer ) \ gforth + \G @var{Definer} is a unique identifier for the way the @var{xt} + \G was defined. Words defined with different @code{does>}-codes + \G have different definers. The definer can be used for + \G comparison and in @code{definer!}. dup >does-code ?dup-if nip 1 or @@ -642,8 +650,9 @@ forth definitions >code-address then ; -: definer! ( definer xt -- ) - \ gives the word represented by xt the behaviour associated with definer +: definer! ( definer xt -- ) \ gforth + \G The word represented by @var{xt} changes its behaviour to the + \G behaviour associated with @var{definer}. over 1 and if swap [ 1 invert ] literal and does-code! else @@ -658,7 +667,6 @@ forth definitions -&32 throw endif ; :noname - 0 0 0. 0.0e0 { c: clocal w: wlocal d: dlocal f: flocal } comp' drop dup >definer case [ ' locals-wordlist ] literal >definer \ value @@ -666,23 +674,23 @@ forth definitions \ !! dependent on c: etc. being does>-defining words \ this works, because >definer uses >does-code in this case, \ which produces a relocatable address - [ comp' clocal drop >definer ] literal + [ comp' some-clocal drop ] literal >definer OF POSTPONE laddr# >body @ lp-offset, POSTPONE c! ENDOF - [ comp' wlocal drop >definer ] literal + [ comp' some-wlocal drop ] literal >definer OF POSTPONE laddr# >body @ lp-offset, POSTPONE ! ENDOF - [ comp' dlocal drop >definer ] literal + [ comp' some-dlocal drop ] literal >definer OF POSTPONE laddr# >body @ lp-offset, POSTPONE 2! ENDOF - [ comp' flocal drop >definer ] literal + [ comp' some-flocal drop ] literal >definer OF POSTPONE laddr# >body @ lp-offset, POSTPONE f! ENDOF -&32 throw endcase ; interpret/compile: TO ( c|w|d|r "name" -- ) \ core-ext,local -: locals| +: locals| ( ... "name ..." -- ) \ local-ext locals-bar \ don't use 'locals|'! use '{'! A portable and free '{' \ implementation is compat/anslocals.fs BEGIN - name 2dup s" |" compare 0<> + name 2dup s" |" str= 0= WHILE (local) REPEAT