version 1.35, 1997/10/04 17:33:53
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version 1.48, 2002/05/28 08:54:27
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\ A powerful locals implementation |
\ A powerful locals implementation |
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\ Copyright (C) 1995 Free Software Foundation, Inc. |
\ Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc. |
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\ This file is part of Gforth. |
\ This file is part of Gforth. |
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\ You should have received a copy of the GNU General Public License |
\ You should have received a copy of the GNU General Public License |
\ along with this program; if not, write to the Free Software |
\ 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. |
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\ More documentation can be found in the manual and in |
\ More documentation can be found in the manual and in |
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Line 87
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require search.fs |
require search.fs |
require float.fs |
require float.fs |
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require extend.fs \ for case |
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: compile-@local ( n -- ) \ gforth compile-fetch-local |
: compile-@local ( n -- ) \ gforth compile-fetch-local |
case |
case |
Line 129 require float.fs
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Line 130 require float.fs
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slowvoc @ |
slowvoc @ |
slowvoc on \ we want a linked list for the vocabulary locals |
slowvoc on \ we want a linked list for the vocabulary locals |
vocabulary locals \ this contains the local variables |
vocabulary locals \ this contains the local variables |
' locals >body ' locals-list >body ! |
' locals >body wordlist-id ' locals-list >body ! |
slowvoc ! |
slowvoc ! |
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create locals-buffer 1000 allot \ !! limited and unsafe |
create locals-buffer 1000 allot \ !! limited and unsafe |
Line 183 variable locals-dp \ so here's the speci
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Line 184 variable locals-dp \ so here's the speci
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= ; |
= ; |
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: list-size ( list -- u ) \ gforth-internal |
: list-size ( list -- u ) \ gforth-internal |
\ size of the locals frame represented by list |
\ size of the locals frame represented by list |
0 ( list n ) |
0 ( list n ) |
begin |
begin |
over 0<> |
over 0<> |
while |
while |
over |
over |
((name>)) >body @ max |
((name>)) >body @ max |
swap @ swap ( get next ) |
swap @ swap ( get next ) |
repeat |
repeat |
faligned nip ; |
faligned nip ; |
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: set-locals-size-list ( list -- ) |
: set-locals-size-list ( list -- ) |
dup locals-list ! |
dup locals-list ! |
list-size locals-size ! ; |
list-size locals-size ! ; |
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: check-begin ( list -- ) |
: check-begin ( list -- ) |
\ warn if list is not a sublist of locals-list |
\ warn if list is not a sublist of locals-list |
Line 292 locals-types definitions
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Line 293 locals-types definitions
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postpone laddr# @ lp-offset, ; |
postpone laddr# @ lp-offset, ; |
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\ you may want to make comments in a locals definitions group: |
\ you may want to make comments in a locals definitions group: |
' \ alias \ immediate |
' \ alias \ ( compilation 'ccc<newline>' -- ; run-time -- ) \ core-ext,block-ext backslash |
' ( alias ( immediate |
\G Comment till the end of the line if @code{BLK} contains 0 (i.e., |
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\G while not loading a block), parse and discard the remainder of the |
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\G parse area. Otherwise, parse and discard all subsequent characters |
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\G in the parse area corresponding to the current line. |
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immediate |
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' ( alias ( ( compilation 'ccc<close-paren>' -- ; run-time -- ) \ core,file paren |
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\G Comment, usually till the next @code{)}: parse and discard all |
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\G subsequent characters in the parse area until ")" is |
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\G encountered. During interactive input, an end-of-line also acts as |
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\G a comment terminator. For file input, it does not; if the |
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\G end-of-file is encountered whilst parsing for the ")" delimiter, |
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\G Gforth will generate a warning. |
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immediate |
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forth definitions |
forth definitions |
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Line 311 also locals-types
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Line 325 also locals-types
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\ the returned nfa denotes a word that produces what W: produces |
\ the returned nfa denotes a word that produces what W: produces |
\ !! do the whole thing without nextname |
\ !! do the whole thing without nextname |
drop nextname |
drop nextname |
['] W: >name ; |
['] W: >head-noprim ; |
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previous |
previous |
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Line 324 create new-locals-map ( -- wordlist-map
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Line 338 create new-locals-map ( -- wordlist-map
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' drop A, \ rehash method |
' drop A, \ rehash method |
' drop A, |
' drop A, |
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slowvoc @ |
new-locals-map mappedwordlist Constant new-locals-wl |
slowvoc on |
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vocabulary new-locals |
\ slowvoc @ |
slowvoc ! |
\ slowvoc on |
new-locals-map ' new-locals >body cell+ A! \ !! use special access words |
\ vocabulary new-locals |
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\ slowvoc ! |
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\ new-locals-map ' new-locals >body wordlist-map A! \ !! use special access words |
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variable old-dpp |
variable old-dpp |
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Line 337 variable old-dpp
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Line 353 variable old-dpp
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dp old-dpp ! |
dp old-dpp ! |
locals-dp dpp ! |
locals-dp dpp ! |
lastxt get-current |
lastxt get-current |
also new-locals |
get-order new-locals-wl swap 1+ set-order |
also locals definitions locals-types |
also locals definitions locals-types |
0 TO locals-wordlist |
0 TO locals-wordlist |
0 postpone [ ; immediate |
0 postpone [ ; immediate |
Line 356 locals-types definitions
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Line 372 locals-types definitions
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locals-size @ alignlp-f locals-size ! \ the strictest alignment |
locals-size @ alignlp-f locals-size ! \ the strictest alignment |
previous previous |
previous previous |
set-current lastcfa ! |
set-current lastcfa ! |
locals-list TO locals-wordlist ; |
locals-list 0 wordlist-id - TO locals-wordlist ; |
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: -- ( addr wid 0 ... -- ) \ gforth dash-dash |
: -- ( addr wid 0 ... -- ) \ gforth dash-dash |
} |
} |
Line 457 forth definitions
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Line 473 forth definitions
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\ explicit scoping |
\ explicit scoping |
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: scope ( compilation -- scope ; run-time -- ) \ gforth |
: scope ( compilation -- scope ; run-time -- ) \ gforth |
cs-push-part scopestart ; immediate |
cs-push-part scopestart ; immediate |
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: adjust-locals-list ( wid -- ) |
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locals-list @ common-list |
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dup list-size adjust-locals-size |
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locals-list ! ; |
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: endscope ( compilation scope -- ; run-time -- ) \ gforth |
: endscope ( compilation scope -- ; run-time -- ) \ gforth |
scope? |
scope? |
drop |
drop adjust-locals-list ; immediate |
locals-list @ common-list |
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dup list-size adjust-locals-size |
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locals-list ! ; immediate |
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\ adapt the hooks |
\ adapt the hooks |
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Line 510 forth definitions
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Line 528 forth definitions
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else \ both live |
else \ both live |
over list-size adjust-locals-size |
over list-size adjust-locals-size |
>resolve |
>resolve |
locals-list @ common-list dup list-size adjust-locals-size |
adjust-locals-list |
locals-list ! |
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then |
then |
then ; |
then ; |
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Line 616 forth definitions
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Line 633 forth definitions
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endif ; |
endif ; |
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: >definer ( xt -- definer ) |
: >definer ( xt -- definer ) |
\ this gives a unique identifier for the way the xt was defined |
\G @var{Definer} is a unique identifier for the way the @var{xt} |
\ words defined with different does>-codes have different definers |
\G was defined. Words defined with different @code{does>}-codes |
\ the definer can be used for comparison and in definer! |
\G have different definers. The definer can be used for |
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\G comparison and in @code{definer!}. |
dup >does-code |
dup >does-code |
?dup-if |
?dup-if |
nip 1 or |
nip 1 or |
Line 627 forth definitions
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Line 645 forth definitions
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then ; |
then ; |
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: definer! ( definer xt -- ) |
: definer! ( definer xt -- ) |
\ gives the word represented by xt the behaviour associated with definer |
\G The word represented by @var{xt} changes its behaviour to the |
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\G behaviour associated with @var{definer}. |
over 1 and if |
over 1 and if |
swap [ 1 invert ] literal and does-code! |
swap [ 1 invert ] literal and does-code! |
else |
else |