version 1.13, 1999/06/17 15:32:13
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version 1.16, 1999/07/08 09:46:42
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\ yet another Forth objects extension |
\ yet another Forth objects extension |
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\ written by Anton Ertl 1996-1998 |
\ written by Anton Ertl 1996-1999 |
\ 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 263 variable public-wordlist
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Line 263 variable public-wordlist
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\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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: methods ( class -- ) \ objects- objects |
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\g Makes @var{class} the current class. This is intended to be |
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\g used for defining methods to override selectors; you cannot |
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\g define new fields or selectors. |
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dup current-interface ! push-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 |
\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
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Line 280 variable public-wordlist
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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 |
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class-inst-size 2@ ; |
class-inst-size 2@ ; |
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: remove-class-order ( wid1 ... widn n+n1 class -- n1 ) |
: remove-class-order ( wid1 ... widn n+n1 class -- n1 ) |
Line 292 variable public-wordlist
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Line 297 variable public-wordlist
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\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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: end-methods ( -- ) \ objects- objects |
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\g Switch back from defining methods of a class to normal mode |
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\g (currently this just restores the old search order). |
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current-interface @ drop-order ; |
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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}. |
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 ; |
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: end-class ( align offset "name" -- ) \ objects- objects |
: end-class ( align offset "name" -- ) \ objects- objects |
Line 349 variable public-wordlist
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Line 359 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}. |