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third.fth
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: cpf 8 exit
: state cpf ! exit
: ; immediate
' exit ,
false state
exit
: r 1 ;
: h 0 ;
: here h @ ;
: [ immediate 1 state ;
: ] 0 state ;
: if immediate ' jmpz , here 0 , ;
: then immediate dup here swap - swap ! ;
: '\n' 10 ;
: '"' 34 ;
: 'space' 32 ;
: ')' 41 ;
: '0' 48 ;
: cr '\n' emit exit
: find-) key ')' = not if tail find-) then ;
: ( immediate find-) ;
: else immediate
' jmp ,
here
0 ,
swap
dup here swap -
swap !
;
: _print
dup 1 +
swap @
dup '"' =
if
drop exit
then
emit
tail _print
;
: print _print ;
( print the next thing from the instruction stream )
: immprint
r @ @
print
r @ !
;
: find-"
key dup ,
'"' =
if
exit
then
tail find-"
;
: " immediate
key drop
' immprint ,
find-"
;
: _.( key dup ')' = if drop exit then emit tail _.( ;
: .( key drop _.( ;
.(
Welcome to third.
Ok.
) cr