1 ! Copyright (C) 2007 Daniel Ehrenberg
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors combinators kernel lexer locals make math
4 namespaces parser quotations sequences words ;
7 ERROR: bad-heredoc identifier ;
11 : rest-of-line ( lexer -- seq )
12 [ line-text>> ] [ column>> ] bi tail ;
14 : next-line-text ( lexer -- str )
15 [ next-line ] [ line-text>> ] bi ;
17 : (parse-here) ( lexer -- )
21 [ % CHAR: \n , (parse-here) ] if
22 ] [ drop ";" throw-unexpected-eof ] if* ;
26 ERROR: text-found-before-eol string ;
28 : parse-here ( -- str )
31 dup rest-of-line [ text-found-before-eol ] unless-empty
38 ( -- string ) define-inline ;
42 : lexer-eof? ( lexer -- ? )
43 [ line>> ] [ text>> length ] bi <= ;
45 :: (scan-multiline-string) ( i end lexer -- j )
46 lexer line-text>> :> text
48 end text i start* [| j |
49 i j text subseq % j end length +
51 text i short tail % CHAR: \n ,
53 0 end lexer (scan-multiline-string)
55 ] [ end throw-unexpected-eof ] if ;
57 :: (parse-multiline-string) ( end-text lexer skip-n-chars -- str )
60 [ skip-n-chars + end-text lexer (scan-multiline-string) ]
64 : advance-same-line ( lexer text -- )
65 length [ + ] curry change-column drop ;
67 :: (parse-til-line-begins) ( begin-text lexer -- )
68 lexer still-parsing? [
69 lexer line-text>> begin-text sequence= [
70 lexer begin-text advance-same-line
72 lexer line-text>> % CHAR: \n ,
74 begin-text lexer (parse-til-line-begins)
77 begin-text bad-heredoc
80 : parse-til-line-begins ( begin-text lexer -- seq )
81 [ (parse-til-line-begins) ] "" make ;
85 : parse-multiline-string ( end-text -- str )
86 lexer get 1 (parse-multiline-string) ;
88 SYNTAX: /* "*/" parse-multiline-string drop ;
95 [ parse-til-line-begins ]
103 [ 0 (parse-multiline-string) ]