115 lines
2.7 KiB
Factor
115 lines
2.7 KiB
Factor
! Copyright (C) 2004, 2007 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: arrays assocs classes combinators combinators.private
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continuations continuations.private generic hashtables io kernel
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kernel.private math namespaces namespaces.private prettyprint
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quotations sequences splitting strings threads vectors words ;
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IN: tools.interpreter
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TUPLE: interpreter continuation ;
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: <interpreter> interpreter construct-empty ;
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GENERIC# restore 1 ( obj interpreter -- )
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M: f restore
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set-interpreter-continuation ;
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M: continuation restore
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>r clone r> set-interpreter-continuation ;
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: with-interpreter-datastack ( quot interpreter -- )
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interpreter-continuation [
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continuation-data
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swap with-datastack
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] keep set-continuation-data ; inline
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M: pair restore
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>r first2 r> [ restore ] keep
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>r [ nip f ] curry r> with-interpreter-datastack ;
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<PRIVATE
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: (step-into-call) \ break add* call ;
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: (step-into-if) ? (step-into-call) ;
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: (step-into-dispatch)
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nth (step-into-call) ;
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: (step-into-execute) ( word -- )
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dup "step-into" word-prop [
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call
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] [
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dup compound? [
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word-def (step-into-call)
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] [
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execute break
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] if
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] ?if ;
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: (step-into-continuation)
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continuation callstack over set-continuation-call break ;
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M: word (step-into) (step-into-execute) ;
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{
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{ call [ (step-into-call) ] }
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{ (throw) [ (step-into-call) ] }
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{ execute [ (step-into-execute) ] }
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{ if [ (step-into-if) ] }
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{ dispatch [ (step-into-dispatch) ] }
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{ continuation [ (step-into-continuation) ] }
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} [ "step-into" set-word-prop ] assoc-each
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{
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>n ndrop >c c>
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continue continue-with
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(continue-with) stop break
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} [
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dup [ execute break ] curry
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"step-into" set-word-prop
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] each
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! Stepping
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: change-innermost-frame ( quot interpreter -- )
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interpreter-continuation [
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continuation-call clone
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[
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dup innermost-frame-scan 1+
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swap innermost-frame-quot
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rot call
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] keep
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[ set-innermost-frame-quot ] keep
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] keep set-continuation-call ; inline
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: (step) ( interpreter quot -- )
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swap
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[ change-innermost-frame ] keep
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[ interpreter-continuation with-walker-hook ] keep
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restore ;
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PRIVATE>
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: step ( interpreter -- )
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[
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2dup nth \ break = [
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nip
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] [
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>r 1+ r> cut [ break ] swap 3append
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] if
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] (step) ;
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: step-out ( interpreter -- )
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[ nip \ break add ] (step) ;
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: step-into ( interpreter -- )
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[
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cut [
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swap % unclip literalize , \ (step-into) , %
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] [ ] make
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] (step) ;
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: step-all ( interpreter -- )
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interpreter-continuation [ (continue) ] curry in-thread ;
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