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 [ next-line ] [ line-text>> ] bi ;
20 [ drop lexer get next-line ]
21 [ % "\n" % (parse-here) ] if
22 ] [ ";" throw-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 : lexer-eof? ( lexer -- ? )
42 [ line>> ] [ text>> length ] bi <= ;
44 :: (scan-multiline-string) ( i end -- j )
45 lexer get line-text>> :> text
46 lexer get lexer-eof? [
47 end text i start* [| j |
48 i j text subseq % j end length +
50 text i short tail % CHAR: \n ,
52 0 end (scan-multiline-string)
54 ] [ end throw-unexpected-eof ] if ;
56 :: (parse-multiline-string) ( end-text skip-n-chars -- str )
59 [ skip-n-chars + end-text (scan-multiline-string) ]
63 :: advance-same-line ( text -- )
64 lexer get [ text length + ] change-column drop ;
66 :: (parse-til-line-begins) ( begin-text -- )
67 lexer get still-parsing? [
68 lexer get line-text>> begin-text sequence= [
69 begin-text advance-same-line
71 lexer get line-text>> % "\n" %
73 begin-text (parse-til-line-begins)
76 begin-text bad-heredoc
79 : parse-til-line-begins ( begin-text -- seq )
80 [ (parse-til-line-begins) ] "" make ;
84 : parse-multiline-string ( end-text -- str )
85 1 (parse-multiline-string) ;
87 SYNTAX: /* "*/" parse-multiline-string drop ;
93 parse-til-line-begins suffix! ;
99 0 (parse-multiline-string) suffix! ;