version 1.15, 1999/07/05 19:56:01
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version 1.19, 2000/09/23 15:06:01
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\ yet another Forth objects extension |
\ yet another Forth objects extension |
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\ written by Anton Ertl 1996-1999 |
\ written by Anton Ertl 1996-2000 |
\ public domain; NO WARRANTY |
\ public domain; NO WARRANTY |
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\ 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
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Line 259 variable public-wordlist
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then |
then |
r> class-wordlist @ swap 1+ ; |
r> class-wordlist @ swap 1+ ; |
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: 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 ; |
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: push-order class>order ; \ old name |
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: methods ( class -- ) \ objects- objects |
: methods ( class -- ) \ objects- objects |
\g Makes @var{class} the current class. This is intended to be |
\g Makes @var{class} the current class. This is intended to be |
\g used for defining methods to override selectors; you cannot |
\g used for defining methods to override selectors; you cannot |
\g define new fields or selectors. |
\g define new fields or selectors. |
dup current-interface ! push-order ; |
dup current-interface ! class>order ; |
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: 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 |
Line 291 variable public-wordlist
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Line 293 variable public-wordlist
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until |
until |
drop ; |
drop ; |
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: 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 ; |
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: drop-order class-previous ; \ old name |
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: end-methods ( -- ) \ objects- objects |
: end-methods ( -- ) \ objects- objects |
\g Switch back from defining methods of a class to normal mode |
\g Switch back from defining methods of a class to normal mode |
\g (currently this just restores the old search order). |
\g (currently this just restores the old search order). |
current-interface @ drop-order ; |
current-interface @ class-previous ; |
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: 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}. |
Line 359 variable public-wordlist
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Line 363 variable public-wordlist
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\ : to-this ( object -- ) |
\ : to-this ( object -- ) |
\ thisp ! ; |
\ thisp ! ; |
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: 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 |
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POSTPONE this |
POSTPONE this |
POSTPONE >r |
POSTPONE >r |
POSTPONE to-this ; |
POSTPONE to-this ; |
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: m: ( -- xt colon-sys; run-time: object -- ) \ objects- objects |
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\g Start a method definition; @var{object} becomes new @code{this}. |
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:noname enterm ; |
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: :m ( "name" -- xt; run-time: object -- ) \ objects- objects |
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\g Start a named method definition; @var{object} becomes new |
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\g @code{this}. Has to be ended with @code{;m}. |
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: enterm ; |
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: 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 473 current-interface 1 cells save-mem curre
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Line 485 current-interface 1 cells save-mem curre
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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 |
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' drop ( object -- ) |
' drop ( object -- ) |
method construct ( ... object -- ) \ objects- objects |
method construct ( ... object -- ) \ objects- objects |
Line 486 method print ( object -- ) \ objects- ob
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Line 498 method print ( object -- ) \ objects- ob
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\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. |
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selector equal ( object1 object2 -- flag ) |
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end-class object ( -- class ) \ objects- objects |
end-class object ( -- class ) \ objects- objects |
\g the ancestor of all classes. |
\g the ancestor of all classes. |
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