Update ICU to 58.1

source/i18n/scriptset.h

Index: source/i18n/scriptset.h
diff --git a/source/i18n/scriptset.h b/source/i18n/scriptset.h
index 62af5d591d100c89f7b994e0870bf3f11e4bd915..e8de3b9613f9909ca46091d2d00e81e85555c0fa 100644
--- a/source/i18n/scriptset.h
+++ b/source/i18n/scriptset.h
@@ -1,3 +1,5 @@
+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
 /*
 **********************************************************************
 *   Copyright (C) 2013, International Business Machines
@@ -38,6 +40,7 @@ class U_I18N_API ScriptSet: public UMemory {
     ~ScriptSet();
 
     UBool operator == (const ScriptSet &other) const;
+    UBool operator != (const ScriptSet &other) const {return !(*this == other);};
     ScriptSet & operator = (const ScriptSet &other);
 
     UBool      test(UScriptCode script, UErrorCode &status) const;
@@ -55,9 +58,14 @@ class U_I18N_API ScriptSet: public UMemory {
     int32_t hashCode() const;
     int32_t nextSetBit(int32_t script) const;
 
+    UBool isEmpty() const;
+
     UnicodeString &displayScripts(UnicodeString &dest) const; // append script names to dest string.
     ScriptSet & parseScripts(const UnicodeString &scriptsString, UErrorCode &status);  // Replaces ScriptSet contents.
 
+    // Wraps around UScript::getScriptExtensions() and adds the corresponding scripts to this instance.
+    void setScriptExtensions(UChar32 codePoint, UErrorCode& status);
+
   private:
     uint32_t  bits[6];
 };