multiline: pass the lexer around instead of using namespaces all the time.

basis/multiline/multiline.factor

@@ -1,25 +1,25 @@
 ! Copyright (C) 2007 Daniel Ehrenberg
 ! See http://factorcode.org/license.txt for BSD license.
-USING: namespaces make parser lexer kernel sequences words
+USING: accessors combinators kernel lexer locals make math
-quotations math accessors locals ;
+namespaces parser quotations sequences words ;
 IN: multiline
 
 ERROR: bad-heredoc identifier ;
 
 <PRIVATE
 
-: rest-of-line ( -- seq )
+: rest-of-line ( lexer -- seq )
-    lexer get [ line-text>> ] [ column>> ] bi tail ;
+    [ line-text>> ] [ column>> ] bi tail ;
 
-: next-line-text ( -- str )
+: next-line-text ( lexer -- str )
-    lexer get [ next-line ] [ line-text>> ] bi ;
+    [ next-line ] [ line-text>> ] bi ;
 
-: (parse-here) ( -- )
+: (parse-here) ( lexer -- )
-    next-line-text [
+    dup next-line-text [
         dup ";" =
-        [ drop lexer get next-line ]
+        [ drop next-line ]
-        [ % "\n" % (parse-here) ] if
+        [ % CHAR: \n , (parse-here) ] if
-    ] [ ";" throw-unexpected-eof ] if* ;
+    ] [ drop ";" throw-unexpected-eof ] if* ;
 
 PRIVATE>
 
@@ -27,7 +27,8 @@ ERROR: text-found-before-eol string ;
 
 : parse-here ( -- str )
     [
-        rest-of-line dup [ drop ] [ text-found-before-eol ] if-empty
+        lexer get
+        dup rest-of-line [ text-found-before-eol ] unless-empty
         (parse-here)
     ] "" make but-last ;
 
@@ -41,59 +42,63 @@ SYNTAX: STRING:
 : lexer-eof? ( lexer -- ? )
     [ line>> ] [ text>> length ] bi <= ;
 
-:: (scan-multiline-string) ( i end -- j )
+:: (scan-multiline-string) ( i end lexer -- j )
-    lexer get line-text>> :> text
+    lexer line-text>> :> text
-    lexer get lexer-eof? [
+    lexer lexer-eof? [
         end text i start* [| j |
             i j text subseq % j end length +
         ] [
             text i short tail % CHAR: \n ,
-            lexer get next-line
+            lexer next-line
-            0 end (scan-multiline-string)
+            0 end lexer (scan-multiline-string)
         ] if*
     ] [ end throw-unexpected-eof ] if ;
 
-:: (parse-multiline-string) ( end-text skip-n-chars -- str )
+:: (parse-multiline-string) ( end-text lexer skip-n-chars -- str )
     [
-        lexer get
+        lexer
-        [ skip-n-chars + end-text (scan-multiline-string) ]
+        [ skip-n-chars + end-text lexer (scan-multiline-string) ]
         change-column drop
     ] "" make ;
 
-:: advance-same-line ( text -- )
+: advance-same-line ( lexer text -- )
-    lexer get [ text length + ] change-column drop ;
+    length [ + ] curry change-column drop ;
 
-:: (parse-til-line-begins) ( begin-text -- )
+:: (parse-til-line-begins) ( begin-text lexer -- )
-    lexer get still-parsing? [
+    lexer still-parsing? [
-        lexer get line-text>> begin-text sequence= [
+        lexer line-text>> begin-text sequence= [
-            begin-text advance-same-line
+            lexer begin-text advance-same-line
         ] [
-            lexer get line-text>> % "\n" %
+            lexer line-text>> % CHAR: \n ,
-            lexer get next-line
+            lexer next-line
-            begin-text (parse-til-line-begins)
+            begin-text lexer (parse-til-line-begins)
         ] if
     ] [
         begin-text bad-heredoc
     ] if ;
 
-: parse-til-line-begins ( begin-text -- seq )
+: parse-til-line-begins ( begin-text lexer -- seq )
     [ (parse-til-line-begins) ] "" make ;
 
 PRIVATE>
 
 : parse-multiline-string ( end-text -- str )
-    1 (parse-multiline-string) ;
+    lexer get 1 (parse-multiline-string) ;
 
 SYNTAX: /* "*/" parse-multiline-string drop ;
 
 SYNTAX: HEREDOC:
-    lexer get skip-blank
+    lexer get {
-    rest-of-line
+        [ skip-blank ]
-    lexer get next-line
+        [ rest-of-line ]
-    parse-til-line-begins suffix! ;
+        [ next-line ]
+        [ parse-til-line-begins ]
+    } cleave suffix! ;
 
 SYNTAX: DELIMITED:
-    lexer get skip-blank
+    lexer get {
-    rest-of-line
+        [ skip-blank ]
-    lexer get next-line
+        [ rest-of-line ]
-    0 (parse-multiline-string) suffix! ;
+        [ next-line ]
+        [ 0 (parse-multiline-string) ]
+    } cleave suffix! ;