73 lines
2.4 KiB
Factor
73 lines
2.4 KiB
Factor
! (c)2010 Joe Groff bsd license
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USING: accessors arrays assocs combinators combinators.short-circuit
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continuations effects fry kernel locals math math.order namespaces
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quotations sequences splitting
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stack-checker.backend
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stack-checker.errors
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stack-checker.known-words
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stack-checker.state
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stack-checker.values
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stack-checker.visitor ;
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IN: stack-checker.row-polymorphism
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:: with-inner-d ( quot -- inner-d )
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inner-d-index get :> old-inner-d-index
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meta-d length inner-d-index set
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quot call
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inner-d-index get :> new-inner-d-index
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old-inner-d-index new-inner-d-index min inner-d-index set
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new-inner-d-index ; inline
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:: with-effect-here ( quot -- effect )
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input-count get :> old-input-count
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meta-d length :> old-meta-d-length
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quot with-inner-d :> inner-d
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input-count get :> new-input-count
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old-meta-d-length inner-d -
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new-input-count old-input-count - + :> in
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meta-d length inner-d - :> out
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in "x" <array> out "x" <array> terminated? get <terminated-effect> ; inline
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:: check-variable ( actual-count declared-count variable vars -- difference ? )
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actual-count declared-count -
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variable [
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variable vars at* nip
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[ variable vars at - ]
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[ variable vars set-at 0 ] if
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t
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] [ dup 0 <= ] if ;
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: adjust-variable ( diff var vars -- )
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pick 0 >=
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[ at+ ]
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[ 3drop ] if ; inline
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:: check-variables ( vars declared actual -- ? )
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actual terminated?>> [ t ] [
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actual declared [ in>> length ] bi@ declared in-var>>
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[ vars check-variable ] keep :> ( in-diff in-ok? in-var )
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actual declared [ out>> length ] bi@ declared out-var>>
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[ vars check-variable ] keep :> ( out-diff out-ok? out-var )
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{ [ in-ok? ] [ out-ok? ] [ in-diff out-diff = ] } 0&&
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dup [
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in-var [ in-diff swap vars adjust-variable ] when*
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out-var [ out-diff swap vars adjust-variable ] when*
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] when
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] if ;
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: complex-unbalanced-branches-error ( known -- * )
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[ word>> ] [
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branches>> <reversed>
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[ [ known>callable ] { } map-as ]
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[ [ effect>> ] { } map-as ]
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[ [ actual>> ] { } map-as ] tri
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] bi unbalanced-branches-error ;
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: check-declared-effect ( known effect -- )
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[ >>actual ] keep
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2dup [ [ variables>> ] [ effect>> ] bi ] dip check-variables
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[ 2drop ] [ drop complex-unbalanced-branches-error ] if ;
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