61 lines
1.6 KiB
Factor
61 lines
1.6 KiB
Factor
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! (c)2010 Joe Groff bsd license
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USING: accessors definitions fry kernel locals.types namespaces parser
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see sequences words ;
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FROM: help.markup.private => link-effect? ;
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IN: variables
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PREDICATE: variable < word
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"variable-setter" word-prop ;
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GENERIC: variable-setter ( word -- word' )
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M: variable variable-setter "variable-setter" word-prop ;
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M: local-reader variable-setter "local-writer" word-prop ;
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SYNTAX: set:
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scan-object variable-setter suffix! ;
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: [variable-getter] ( variable -- quot )
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'[ _ get ] ;
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: [variable-setter] ( variable -- quot )
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'[ _ set ] ;
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: (define-variable) ( word getter setter -- )
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[ (( -- value )) define-inline ]
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[
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[
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[ name>> "set: " prepend <uninterned-word> ]
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[ over "variable-setter" set-word-prop ] bi
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] dip (( value -- )) define-inline
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] bi-curry* bi ;
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: define-variable ( word -- )
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dup [ [variable-getter] ] [ [variable-setter] ] bi (define-variable) ;
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SYNTAX: VAR:
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CREATE-WORD define-variable ;
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M: variable definer drop \ VAR: f ;
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M: variable definition drop f ;
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M: variable link-effect? drop f ;
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M: variable print-stack-effect? drop f ;
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TUPLE: global-box value ;
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PREDICATE: global-variable < variable
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"variable-setter" word-prop def>> first global-box? ;
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: [global-getter] ( box -- quot )
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'[ _ value>> ] ;
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: [global-setter] ( box -- quot )
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'[ _ (>>value) ] ;
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: define-global ( word -- )
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global-box new [ [global-getter] ] [ [global-setter] ] bi (define-variable) ;
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SYNTAX: GLOBAL:
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CREATE-WORD define-global ;
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M: global-variable definer drop \ GLOBAL: f ;
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