Re: [Amforth-devel] words: tuck/under etc

[Kalus M. <mic...@on...>]

Bernhard.

Am 15.07.2008 um 03:03 schrieb Bernard Mentink:

>
> Also, in the FSM code he defines a PERFORM word as:  .... : PERFORM  
> compile
> @ compile execute ;
> Would the same thing in amForth be: .... : PERFORM defer @ defer  
> execute ;
> or do we still use "compile"???? I am a bit
> rusty on what "defer" does.
>

No idea what ist goin on here.

I found a definition in former F83 for the 6502 cpu:

: PERFORM ( ADDR -- )   @ EXECUTE ;


gforth doc says:
  ...execute performs the semantics represented by the
XT (i.e., for XTs produced with ’ the interpretation semantics).

So:  ' swap execute   simply does  SWAP

To get an execution vector you can store an XT (execution token) into  
a variable and PERFORM this variable with the phrase  @ EXECUTE



variable dance

' hiphop dance !
...
perform dance
...
' walz dance !
...
perform dance


Does this help?  Michael