ICU-990 add toRules to RBT

X-SVN-Rev: 4966

icu4c/source/i18n/rbt.cpp

@@ -13,6 +13,8 @@
 #include "rbt_rule.h"
 #include "unicode/rep.h"
 
+char RuleBasedTransliterator::fgClassID = 0; // Value is irrelevant
+
 void RuleBasedTransliterator::_construct(const UnicodeString& rules,
                                          UTransDirection direction,
                                          UErrorCode& status,
@@ -140,3 +142,8 @@ RuleBasedTransliterator::handleTransliterate(Replaceable& text, UTransPosition&
         }
     }
 }
+
+UnicodeString& RuleBasedTransliterator::toRules(UnicodeString& rulesSource,
+                                                UBool escapeUnprintable) const {
+    return data->ruleSet.toRules(rulesSource, *data, escapeUnprintable);
+}