110 lines
3.0 KiB
Factor
110 lines
3.0 KiB
Factor
! Copyright (C) 2007 Daniel Ehrenberg
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors combinators kernel lexer locals make math
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namespaces parser quotations sequences words ;
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IN: multiline
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ERROR: bad-heredoc identifier ;
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<PRIVATE
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: rest-of-line ( lexer -- seq )
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[ line-text>> ] [ column>> ] bi tail ;
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: next-line-text ( lexer -- str ? )
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[ next-line ] [ line-text>> ] [ still-parsing? ] tri ;
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: (parse-here) ( lexer -- )
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dup next-line-text [
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dup ";" =
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[ drop next-line ]
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[ % CHAR: \n , (parse-here) ] if
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] [ ";" throw-unexpected-eof ] if ;
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PRIVATE>
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ERROR: text-found-before-eol string ;
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: parse-here ( -- str )
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[
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lexer get
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dup rest-of-line [ text-found-before-eol ] unless-empty
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(parse-here)
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] "" make but-last ;
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SYNTAX: STRING:
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scan-new-word
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parse-here 1quotation
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( -- string ) define-inline ;
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<PRIVATE
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:: (scan-multiline-string) ( i end lexer -- j )
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lexer line-text>> :> text
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lexer still-parsing? [
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end text i subseq-start-from [| j |
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i j text subseq % j end length +
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] [
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text i short tail % CHAR: \n ,
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lexer next-line
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0 end lexer (scan-multiline-string)
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] if*
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] [ end throw-unexpected-eof ] if ;
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:: (parse-multiline-string) ( end-text lexer skip-n-chars -- str )
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[
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lexer
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[ skip-n-chars + end-text lexer (scan-multiline-string) ]
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change-column drop
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] "" make ;
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: advance-same-line ( lexer text -- )
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length [ + ] curry change-column drop ;
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:: (parse-til-line-begins) ( begin-text lexer -- )
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lexer still-parsing? [
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lexer line-text>> begin-text sequence= [
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lexer begin-text advance-same-line
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] [
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lexer line-text>> % CHAR: \n ,
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lexer next-line
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begin-text lexer (parse-til-line-begins)
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] if
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] [
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begin-text bad-heredoc
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] if ;
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: parse-til-line-begins ( begin-text lexer -- seq )
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[ (parse-til-line-begins) ] "" make ;
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PRIVATE>
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: parse-multiline-string ( end-text -- str )
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lexer get 1 (parse-multiline-string) ;
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SYNTAX: /* "*/" parse-multiline-string drop ;
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SYNTAX: HEREDOC:
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lexer get {
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[ skip-blank ]
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[ rest-of-line ]
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[ next-line ]
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[ parse-til-line-begins ]
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} cleave suffix! ;
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SYNTAX: [[ "]]" parse-multiline-string suffix! ;
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SYNTAX: [=[ "]=]" parse-multiline-string suffix! ;
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SYNTAX: [==[ "]==]" parse-multiline-string suffix! ;
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SYNTAX: [===[ "]===]" parse-multiline-string suffix! ;
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SYNTAX: [====[ "]====]" parse-multiline-string suffix! ;
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SYNTAX: [=====[ "]=====]" parse-multiline-string suffix! ;
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SYNTAX: [======[ "]======]" parse-multiline-string suffix! ;
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SYNTAX: ![[ "]]" parse-multiline-string drop ;
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SYNTAX: ![=[ "]=]" parse-multiline-string drop ;
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SYNTAX: ![==[ "]==]" parse-multiline-string drop ;
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SYNTAX: ![===[ "]===]" parse-multiline-string drop ;
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SYNTAX: ![====[ "]====]" parse-multiline-string drop ;
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SYNTAX: ![=====[ "]=====]" parse-multiline-string drop ;
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SYNTAX: ![======[ "]======]" parse-multiline-string drop ;
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