move words around, some docs, start of case insensitive

extra/regexp2/backend/backend.factor

@@ -10,6 +10,7 @@ TUPLE: regexp
     nfa-table
     dfa-table
     minimized-table
+    case-insensitive
     { state integer }
     { new-states vector }
     { visited-states hashtable } ;

extra/regexp2/regexp2-docs.factor

@@ -0,0 +1,14 @@
+! Copyright (C) 2008 Doug Coleman.
+! See http://factorcode.org/license.txt for BSD license.
+USING: kernel strings help.markup help.syntax regexp2.backend ;
+IN: regexp2
+
+HELP: <regexp>
+{ $values { "string" string } { "regexp" regexp } }
+{ $description "Compiles a regular expression into a DFA and returns this object.  Regular expressions only have to be compiled once and can then be used multiple times to match input strings." } ;
+
+HELP: <iregexp>
+{ $values { "string" string } { "regexp" regexp } }
+{ $description "Compiles a case-insensitive regular expression into a DFA and returns this object.  Otherwise, exactly the same as " { $link <regexp> } } ;
+
+{ <regexp> <iregexp> } related-words

extra/regexp2/regexp2.factor

@@ -1,7 +1,8 @@
 ! Copyright (C) 2008 Doug Coleman.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: accessors combinators kernel regexp2.backend regexp2.utils
+USING: accessors combinators kernel math math.ranges
-regexp2.parser regexp2.nfa regexp2.dfa regexp2.traversal state-tables
+sequences regexp2.backend regexp2.utils memoize
+regexp2.parser regexp2.nfa regexp2.dfa regexp2.traversal
 regexp2.transition-tables ;
 IN: regexp2
 
@@ -13,8 +14,7 @@ IN: regexp2
         <transition-table> >>minimized-table
         reset-regexp ;
 
-: <regexp> ( string -- regexp )
+: construct-regexp ( regexp -- regexp' )
-    default-regexp
     {
         [ parse-regexp ]
         [ construct-nfa ]
@@ -22,6 +22,22 @@ IN: regexp2
         [ ]
     } cleave ;
 
+: match ( string regexp -- pair )
+    <dfa-traverser> do-match return-match ;
+
+: matches? ( string regexp -- ? )
+    dupd match [ [ length ] [ range-length 1- ] bi* = ] [ drop f ] if* ;
+
+: match-head ( string regexp -- end ) match length>> 1- ;
+
+MEMO: <regexp> ( string -- regexp )
+    default-regexp construct-regexp ;
+
+MEMO: <iregexp> ( string -- regexp )
+    default-regexp
+    t >>case-insensitive
+    construct-regexp ;
+
 : R! CHAR: ! <regexp> ; parsing
 : R" CHAR: " <regexp> ; parsing
 : R# CHAR: # <regexp> ; parsing

extra/regexp2/traversal/traversal.factor

@@ -78,11 +78,3 @@ TUPLE: dfa-traverser
     dup matches>>
     [ drop f ]
     [ [ start-index>> ] [ peek ] bi* 1 <range> ] if-empty ;
-
-: match ( string regexp -- pair )
-    <dfa-traverser> do-match return-match ;
-
-: matches? ( string regexp -- ? )
-    dupd match [ [ length ] [ range-length 1- ] bi* = ] [ drop f ] if* ;
-
-: match-head ( string regexp -- end ) match length>> 1- ;