38 lines
1010 B
Factor
38 lines
1010 B
Factor
! Copyright (C) 2008 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: byte-arrays strings sequences sequences.private
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fry kernel words parser lexer assocs math.order ;
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IN: tr
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<PRIVATE
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: compute-tr ( quot from to -- mapping )
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zip [ 256 ] 2dip '[ [ @ _ at ] keep or ] B{ } map-as ; inline
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: tr-hints ( word -- )
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{ { byte-array } { string } } "specializer" set-word-prop ;
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: create-tr ( token -- word )
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create-in dup tr-hints ;
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: tr-quot ( mapping -- quot )
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'[ [ dup 0 255 between? [ _ nth-unsafe ] when ] map ] ;
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: define-tr ( word mapping -- )
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tr-quot (( seq -- translated )) define-declared ;
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: fast-tr-quot ( mapping -- quot )
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'[ [ _ nth-unsafe ] change-each ] ;
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: define-fast-tr ( word mapping -- )
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fast-tr-quot (( seq -- )) define-declared ;
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PRIVATE>
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: TR:
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scan parse-definition
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unclip-last [ unclip-last ] dip compute-tr
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[ [ create-tr ] dip define-tr ]
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[ [ "-fast" append create-tr ] dip define-fast-tr ] 2bi ;
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parsing
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