22 lines
721 B
Factor
22 lines
721 B
Factor
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! Copyright (C) 2008 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: io kernel macros make multiline namespaces parser
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peg.ebnf present sequences strings ;
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IN: interpolate
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MACRO: interpolate ( string -- )
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[EBNF
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var = "${" [^}]+ "}" => [[ second >string [ get present write ] curry ]]
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text = [^$]+ => [[ >string [ write ] curry ]]
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interpolate = (var|text)* => [[ [ ] join ]]
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EBNF] ;
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EBNF: interpolate-locals
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var = "${" [^}]+ "}" => [[ [ second >string search , [ present write ] % ] [ ] make ]]
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text = [^$]+ => [[ [ >string , [ write ] % ] [ ] make ]]
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interpolate = (var|text)* => [[ [ ] join ]]
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;EBNF
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: I[ "]I" parse-multiline-string
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interpolate-locals parsed \ call parsed ; parsing
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