version 1.13, 1999/06/17 15:32:13
|
version 1.18, 2000/08/23 21:03:52
|
Line 1
|
Line 1
|
\ yet another Forth objects extension |
\ yet another Forth objects extension |
|
|
\ written by Anton Ertl 1996-1998 |
\ written by Anton Ertl 1996-1999 |
\ public domain; NO WARRANTY |
\ public domain; NO WARRANTY |
|
|
\ This (in combination with compat/struct.fs) is in ANS Forth (with an |
\ This (in combination with compat/struct.fs) is in ANS Forth (with an |
Line 259 variable public-wordlist
|
Line 259 variable public-wordlist
|
then |
then |
r> class-wordlist @ swap 1+ ; |
r> class-wordlist @ swap 1+ ; |
|
|
: push-order ( class -- ) \ objects- objects |
: class>order ( class -- ) \ objects- objects |
\g Add @var{class}'s wordlists to the head of the search-order. |
\g Add @var{class}'s wordlists to the head of the search-order. |
>r get-order r> add-class-order set-order ; |
>r get-order r> add-class-order set-order ; |
|
|
|
: push-order class>order ; \ old name |
|
|
|
: methods ( class -- ) \ objects- objects |
|
\g Makes @var{class} the current class. This is intended to be |
|
\g used for defining methods to override selectors; you cannot |
|
\g define new fields or selectors. |
|
dup current-interface ! class>order ; |
|
|
: class ( parent-class -- align offset ) \ objects- objects |
: class ( parent-class -- align offset ) \ objects- objects |
\g Start a new class definition as a child of |
\g Start a new class definition as a child of |
\g @var{parent-class}. @var{align offset} are for use by |
\g @var{parent-class}. @var{align offset} are for use by |
Line 274 variable public-wordlist
|
Line 282 variable public-wordlist
|
0 r@ interface-offset ! |
0 r@ interface-offset ! |
dup r@ class-parent ! |
dup r@ class-parent ! |
wordlist r@ class-wordlist ! |
wordlist r@ class-wordlist ! |
r@ current-interface ! |
r> methods |
r> push-order |
|
class-inst-size 2@ ; |
class-inst-size 2@ ; |
|
|
: remove-class-order ( wid1 ... widn n+n1 class -- n1 ) |
: remove-class-order ( wid1 ... widn n+n1 class -- n1 ) |
Line 286 variable public-wordlist
|
Line 293 variable public-wordlist
|
until |
until |
drop ; |
drop ; |
|
|
: drop-order ( class -- ) \ objects- objects |
: class-previous ( class -- ) \ objects- objects |
\g Drop @var{class}'s wordlists from the search order. No |
\g Drop @var{class}'s wordlists from the search order. No |
\g checking is made whether @var{class}'s wordlists are actually |
\g checking is made whether @var{class}'s wordlists are actually |
\g on the search order. |
\g on the search order. |
>r get-order r> remove-class-order set-order ; |
>r get-order r> remove-class-order set-order ; |
|
|
|
: drop-order class-previous ; \ old name |
|
|
|
: end-methods ( -- ) \ objects- objects |
|
\g Switch back from defining methods of a class to normal mode |
|
\g (currently this just restores the old search order). |
|
current-interface @ class-previous ; |
|
|
: end-class-noname ( align offset -- class ) \ objects- objects |
: end-class-noname ( align offset -- class ) \ objects- objects |
\g End a class definition. The resulting class is @var{class}. |
\g End a class definition. The resulting class is @var{class}. |
public |
public end-methods |
current-interface @ dup drop-order class-inst-size 2! |
current-interface @ class-inst-size 2! |
end-interface-noname ; |
end-interface-noname ; |
|
|
: end-class ( align offset "name" -- ) \ objects- objects |
: end-class ( align offset "name" -- ) \ objects- objects |
Line 349 variable public-wordlist
|
Line 363 variable public-wordlist
|
\ : to-this ( object -- ) |
\ : to-this ( object -- ) |
\ thisp ! ; |
\ thisp ! ; |
|
|
: m: ( -- xt colon-sys; run-time: object -- ) \ objects- objects |
: enterm ( -- ; run-time: object -- ) |
\g Start a method definition; @var{object} becomes new @code{this}. |
\g method prologue; @var{object} becomes new @code{this}. |
:noname |
|
POSTPONE this |
POSTPONE this |
POSTPONE >r |
POSTPONE >r |
POSTPONE to-this ; |
POSTPONE to-this ; |
|
|
|
: m: ( -- xt colon-sys; run-time: object -- ) \ objects- objects |
|
\g Start a method definition; @var{object} becomes new @code{this}. |
|
:noname enterm ; |
|
|
|
: :m ( "name" -- xt; run-time: object -- ) \ objects- objects |
|
\g Start a named method definition; @var{object} becomes new |
|
\g @code{this}. Has to be ended with @code{;m}. |
|
: enterm ; |
|
|
: exitm ( -- ) \ objects- objects |
: exitm ( -- ) \ objects- objects |
\g @code{exit} from a method; restore old @code{this}. |
\g @code{exit} from a method; restore old @code{this}. |
Line 463 current-interface 1 cells save-mem curre
|
Line 485 current-interface 1 cells save-mem curre
|
0 current-interface @ class-parent ! |
0 current-interface @ class-parent ! |
wordlist current-interface @ class-wordlist ! |
wordlist current-interface @ class-wordlist ! |
object% |
object% |
current-interface @ push-order |
current-interface @ class>order |
|
|
' drop ( object -- ) |
' drop ( object -- ) |
method construct ( ... object -- ) \ objects- objects |
method construct ( ... object -- ) \ objects- objects |
Line 476 method print ( object -- ) \ objects- ob
|
Line 498 method print ( object -- ) \ objects- ob
|
\g Print the object. The method for the class @var{object} prints |
\g Print the object. The method for the class @var{object} prints |
\g the address of the object and the address of its class. |
\g the address of the object and the address of its class. |
|
|
|
selector equal ( object1 object2 -- flag ) |
|
|
end-class object ( -- class ) \ objects- objects |
end-class object ( -- class ) \ objects- objects |
\g the ancestor of all classes. |
\g the ancestor of all classes. |
|
|