version 1.46, 2000/09/23 15:46:56
|
version 1.58, 2007/07/06 12:54:56
|
Line 1
|
Line 1
|
\ A powerful locals implementation |
\ A powerful locals implementation |
|
|
\ Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc. |
\ Copyright (C) 1995,1996,1997,1998,2000,2003,2004,2005 Free Software Foundation, Inc. |
|
|
\ This file is part of Gforth. |
\ This file is part of Gforth. |
|
|
Line 87
|
Line 87
|
|
|
require search.fs |
require search.fs |
require float.fs |
require float.fs |
|
require extend.fs \ for case |
|
|
: compile-@local ( n -- ) \ gforth compile-fetch-local |
: compile-@local ( n -- ) \ gforth compile-fetch-local |
case |
case |
Line 309 immediate
|
Line 310 immediate
|
immediate |
immediate |
|
|
forth definitions |
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. |
\ the following gymnastics are for declaring locals without type specifier. |
\ we exploit a feature of our dictionary: every wordlist |
\ we exploit a feature of our dictionary: every wordlist |
\ has it's own methods for finding words etc. |
\ has it's own methods for finding words etc. |
\ So we create a vocabulary new-locals, that creates a 'w:' local named x |
\ So we create a vocabulary new-locals, that creates a 'w:' local named x |
\ when it is asked if it contains x. |
\ when it is asked if it contains x. |
|
|
also locals-types |
|
|
|
: new-locals-find ( caddr u w -- nfa ) |
: new-locals-find ( caddr u w -- nfa ) |
\ this is the find method of the new-locals vocabulary |
\ this is the find method of the new-locals vocabulary |
\ make a new local with name caddr u; w is ignored |
\ make a new local with name caddr u; w is ignored |
Line 348 new-locals-map mappedwordlist Constant n
|
Line 355 new-locals-map mappedwordlist Constant n
|
variable old-dpp |
variable old-dpp |
|
|
\ and now, finally, the user interface words |
\ and now, finally, the user interface words |
: { ( -- lastxt wid 0 ) \ gforth open-brace |
: { ( -- latestxt wid 0 ) \ gforth open-brace |
dp old-dpp ! |
dp old-dpp ! |
locals-dp dpp ! |
locals-dp dpp ! |
lastxt get-current |
latestxt get-current |
get-order new-locals-wl swap 1+ set-order |
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 |
Line 359 variable old-dpp
|
Line 366 variable old-dpp
|
|
|
locals-types definitions |
locals-types definitions |
|
|
: } ( lastxt wid 0 a-addr1 xt1 ... -- ) \ gforth close-brace |
: } ( latestxt wid 0 a-addr1 xt1 ... -- ) \ gforth close-brace |
\ ends locals definitions |
\ ends locals definitions |
] old-dpp @ dpp ! |
] old-dpp @ dpp ! |
begin |
begin |
Line 488 forth definitions
|
Line 495 forth definitions
|
: locals-:-hook ( sys -- sys addr xt n ) |
: locals-:-hook ( sys -- sys addr xt n ) |
\ addr is the nfa of the defined word, xt its xt |
\ addr is the nfa of the defined word, xt its xt |
DEFERS :-hook |
DEFERS :-hook |
last @ lastcfa @ |
latest latestxt |
clear-leave-stack |
clear-leave-stack |
0 locals-size ! |
0 locals-size ! |
locals-buffer locals-dp ! |
locals-buffer locals-dp ! |
Line 631 forth definitions
|
Line 638 forth definitions
|
2drop |
2drop |
endif ; |
endif ; |
|
|
: >definer ( xt -- definer ) |
: >definer ( xt -- definer ) \ gforth |
\ 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 |
|
\G comparison and in @code{definer!}. |
dup >does-code |
dup >does-code |
?dup-if |
?dup-if |
nip 1 or |
nip 1 or |
Line 642 forth definitions
|
Line 650 forth definitions
|
>code-address |
>code-address |
then ; |
then ; |
|
|
: definer! ( definer xt -- ) |
: definer! ( definer xt -- ) \ gforth |
\ gives the word represented by xt the behaviour associated with definer |
\G The word represented by @var{xt} changes its behaviour to the |
|
\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 |
Line 658 forth definitions
|
Line 667 forth definitions
|
-&32 throw |
-&32 throw |
endif ; |
endif ; |
:noname |
:noname |
0 0 0. 0.0e0 { c: clocal w: wlocal d: dlocal f: flocal } |
|
comp' drop dup >definer |
comp' drop dup >definer |
case |
case |
[ ' locals-wordlist ] literal >definer \ value |
[ ' locals-wordlist ] literal >definer \ value |
Line 666 forth definitions
|
Line 674 forth definitions
|
\ !! dependent on c: etc. being does>-defining words |
\ !! dependent on c: etc. being does>-defining words |
\ this works, because >definer uses >does-code in this case, |
\ this works, because >definer uses >does-code in this case, |
\ which produces a relocatable address |
\ 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 |
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 |
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 |
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 |
OF POSTPONE laddr# >body @ lp-offset, POSTPONE f! ENDOF |
-&32 throw |
-&32 throw |
endcase ; |
endcase ; |
interpret/compile: TO ( c|w|d|r "name" -- ) \ core-ext,local |
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 '{' |
\ don't use 'locals|'! use '{'! A portable and free '{' |
\ implementation is compat/anslocals.fs |
\ implementation is compat/anslocals.fs |
BEGIN |
BEGIN |
name 2dup s" |" compare 0<> |
name 2dup s" |" str= 0= |
WHILE |
WHILE |
(local) |
(local) |
REPEAT |
REPEAT |