1 ! Copyright (C) 2007 Daniel Ehrenberg
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: namespaces make parser lexer kernel sequences words
4 quotations math accessors locals ;
7 ERROR: bad-heredoc identifier ;
11 : rest-of-line ( -- seq )
12 lexer get [ line-text>> ] [ column>> ] bi tail ;
14 : next-line-text ( -- str )
15 lexer get dup next-line line-text>> ;
20 [ drop lexer get next-line ]
21 [ % "\n" % (parse-here) ] if
22 ] [ ";" unexpected-eof ] if* ;
26 ERROR: text-found-before-eol string ;
28 : parse-here ( -- str )
30 rest-of-line dup [ drop ] [ text-found-before-eol ] if-empty
37 ( -- string ) define-inline ;
41 :: (scan-multiline-string) ( i end -- j )
42 lexer get line-text>> :> text
44 end text i start* [| j |
45 i j text subseq % j end length +
47 text i short tail % CHAR: \n ,
49 0 end (scan-multiline-string)
51 ] [ end unexpected-eof ] if ;
53 :: (parse-multiline-string) ( end-text skip-n-chars -- str )
56 [ skip-n-chars + end-text (scan-multiline-string) ]
60 :: advance-same-line ( text -- )
61 lexer get [ text length + ] change-column drop ;
63 :: (parse-til-line-begins) ( begin-text -- )
64 lexer get still-parsing? [
65 lexer get line-text>> begin-text sequence= [
66 begin-text advance-same-line
68 lexer get line-text>> % "\n" %
70 begin-text (parse-til-line-begins)
73 begin-text bad-heredoc
76 : parse-til-line-begins ( begin-text -- seq )
77 [ (parse-til-line-begins) ] "" make ;
81 : parse-multiline-string ( end-text -- str )
82 1 (parse-multiline-string) ;
84 SYNTAX: /* "*/" parse-multiline-string drop ;
90 parse-til-line-begins suffix! ;
96 0 (parse-multiline-string) suffix! ;