Check in the pristine copy of ICU 4.6...

icu46/source/test/perf/unisetperf/draft/unicont.h

+/*  
+**********************************************************************
+*   Copyright (C) 2007, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+**********************************************************************
+*   file name:  unicont.h
+*   encoding:   US-ASCII
+*   tab size:   8 (not used)
+*   indentation:4
+*
+*   created on: 2007jan15
+*   created by: Markus Scherer
+*
+*   Idea for new common interface underneath the normal UnicodeSet
+*   and other classes, such as "compiled", fast, read-only (immutable)
+*   versions of UnicodeSet.
+*/
+
+class UnicodeContainable {
+public:
+    virtual ~UnicodeContainable() {}
+
+    virtual UBool contains(UChar32 c) const = 0;
+
+    virtual int32_t span(const UChar *s, int32_t length);
+
+    virtual int32_t spanNot(const UChar *s, int32_t length);
+
+    virtual int32_t spanUTF8(const UChar *s, int32_t length);
+
+    virtual int32_t spanNotUTF8(const UChar *s, int32_t length);
+
+    virtual UClassID getDynamicClassID(void) const;
+};