! Copyright (C) 2007 Doug Coleman.
-! See http://factorcode.org/license.txt for BSD license.
-USING: accessors arrays assocs combinators.smart effects
-effects.parser fry generalizations grouping kernel lexer macros
-math math.order math.vectors namespaces parser quotations
-sequences sequences.private splitting.monotonic stack-checker
-strings unicode words ;
+! See https://factorcode.org/license.txt for BSD license.
+USING: accessors combinators.smart effects.parser
+generalizations grouping kernel lexer math math.order
+parser quotations sequences splitting.monotonic strings unicode
+words ;
IN: roman
<PRIVATE
: roman-digit-index ( ch -- n )
1string roman-digits index ; inline
-: roman>= ( ch1 ch2 -- ? )
+: roman-digit>= ( ch1 ch2 -- ? )
[ roman-digit-index ] bi@ >= ;
-: roman>n ( ch -- n )
+: roman-digit-value ( ch -- n )
roman-digit-index roman-values nth ;
-: (roman>) ( seq -- n )
- [ [ roman>n ] map ] [ all-eq? ] bi
+: roman-value ( seq -- n )
+ [ [ roman-digit-value ] map ] [ all-eq? ] bi
[ sum ] [ first2 swap - ] if ;
PRIVATE>
: >ROMAN ( n -- str ) >roman >upper ;
: roman> ( str -- n )
- >lower [ roman>= ] monotonic-split [ (roman>) ] map-sum ;
+ >lower [ roman-digit>= ] monotonic-split
+ [ roman-value ] map-sum ;
<PRIVATE