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oofsampl.fs
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\ oof.fs Object Oriented FORTH
\ This file is (c) 1996 by Bernd Paysan
\ e-mail: [email protected]
\
\ Please copy and share this program, modify it for your system
\ and improve it as you like. But don't remove this notice.
\
\ Thank you.
\
\ Data structures: data 28nov93py
: place ( addr1 n addr2 -- )
over >r rot over 1+ r> move c! ;
: i! postpone ! ; immediate
: i@ postpone @ ; immediate
object class data \ abstract data class
cell var ref \ reference counter
method ! method @ method .
method null method atom? method #
how: : atom? ( -- flag ) true ;
: # ( -- n ) 0 ;
: null ( -- addr ) new ;
class;
\ Data structures: int 30apr93py
data class int
cell var value
how: : ! value i! ;
: @ value i@ ;
: . @ 0 .r ;
: init ( data -- ) ! ;
: dispose -1 ref +!
ref i@ 0> 0= IF super dispose THEN ;
: null 0 new ;
class;
\ Data structures: list 17nov93py
0 Value nil
data class lists
data ptr first data ptr next
method empty? method ?
how: : null nil ;
: atom? false ;
class;
lists class nil-class
how: : empty? true ;
: dispose ;
: . ." ()" ;
class;
nil-class : (nil (nil self TO nil
nil (nil bind first nil (nil bind next
\ Data structures: list 12mar94py
lists class linked
how: : empty? false ;
: # next # 1+ ;
: ? first . ;
: @ first @ ;
: ! first ! ;
: init ( first next -- )
dup >o 1 ref +! o> bind next
dup >o 1 ref +! o> bind first ;
: . self >o [char] (
BEGIN emit ? next atom? next self o> >o
IF ." . " data . o> ." )" EXIT THEN bl
empty? UNTIL o> drop ." )" ;
: dispose -1 ref +! ref i@ 0> 0=
IF first dispose next dispose super dispose THEN ;
class;
\ Data structures: string 04dec93py
int class string
how: : ! ( addr count -- )
value i@ over 1+ resize throw value i!
value i@ place ;
: @ ( -- addr count ) value i@ count ;
: . @ type ;
: init ( addr count -- )
dup 1+ allocate throw value i! value i@ place ;
: null S" " new ;
: dispose ref i@ 1- 0> 0=
IF value i@ free throw THEN super dispose ;
class;
\ Data sturctures: pointer 17nov93py
data class pointer
data ptr container
method ptr!
how: : ! container ! ;
: @ container @ ;
: . container . ;
: # container # ;
: init ( data -- ) dup >o 1 ref +! o> bind container ;
: ptr! ( data -- ) container dispose init ;
: dispose -1 ref +! ref i@ 0> 0=
IF container dispose super dispose THEN ;
: null nil new ;
class;
\ Data sturctures: array 30apr93py
data class array
data [] container
cell var range
how: : ! container ! ;
: @ container @ ;
: . [char] [
# 0 ?DO emit I container . [char] , LOOP drop ." ]" ;
: init ( data n -- ) range i! bind container ;
: dispose -1 ref +! ref i@ 0> 0=
IF # 0 ?DO I container dispose LOOP
super dispose THEN ;
: null nil 0 new ;
: # range i@ ;
: atom? false ;
class;
\ Data structure utilities 17nov93py
: cons linked new ;
: list nil cons ;
: car >o lists first self o> ;
: cdr >o lists next self o> ;
: print >o data . o> ;
: ddrop >o data dispose o> ;
: make-string string new ;
: $" state @ IF postpone S" postpone make-string exit THEN
[char] " parse make-string ; immediate
\ Examples
$" This" $" is" $" a" list cons $" example" $" list" list cons list cons cons
cr dup print
cr dup car print
cr dup cdr cdr car print
pointer : list1
cr list1 .
1 2 3 3 int new[] 3 array : lotus
cr lotus .
cr 2 lotus @ .
cr 0 lotus @ .
cr 5 1 lotus ! lotus .
\ Interface test
interface bla
method fasel
method blubber
method Hu
how:
: fasel ." Bla Fasel" Hu ;
: blubber ." urps urps" Hu fasel ;
interface;
object class test
bla
method .
how:
: Hu ." ! " ;
: . fasel ;
class;
test : test1
cr test1 fasel
cr test1 blubber
cr test1 .
cr test1 self >o bla blubber o>
\ This should output the following lines:
\
\ (This (is a) (example list))
\ This
\ (example list)
\ (This (is a) (example list))
\ [1,2,3]
\ 3
\ 1
\ [1,5,3]
\ Bla Fasel!
\ urps urps! Bla Fasel!
\ Bla Fasel!
\ urps urps! Bla Fasel!