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diff --git a/intl/icu/source/i18n/quant.h b/intl/icu/source/i18n/quant.h
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+++ b/intl/icu/source/i18n/quant.h
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+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+ **********************************************************************
+ * Copyright (C) 2001-2011, International Business Machines Corporation
+ * and others. All Rights Reserved.
+ **********************************************************************
+ *   Date        Name        Description
+ *   07/26/01    aliu        Creation.
+ **********************************************************************
+ */
+#ifndef QUANT_H
+#define QUANT_H
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_TRANSLITERATION
+
+#include "unicode/unifunct.h"
+#include "unicode/unimatch.h"
+
+U_NAMESPACE_BEGIN
+
+class Quantifier : public UnicodeFunctor, public UnicodeMatcher {
+
+ public:
+
+    enum { MAX = 0x7FFFFFFF };
+
+    Quantifier(UnicodeFunctor *adoptedMatcher,
+               uint32_t minCount, uint32_t maxCount);
+
+    Quantifier(const Quantifier& o);
+
+    virtual ~Quantifier();
+
+    /**
+     * UnicodeFunctor API.  Cast 'this' to a UnicodeMatcher* pointer
+     * and return the pointer.
+     * @return the UnicodeMatcher pointer.
+     */
+    virtual UnicodeMatcher* toMatcher() const override;
+
+    /**
+     * Implement UnicodeFunctor
+     * @return a copy of the object.
+     */
+    virtual Quantifier* clone() const override;
+
+    /**
+     * Implement UnicodeMatcher
+     * @param text the text to be matched
+     * @param offset on input, the index into text at which to begin
+     * matching.  On output, the limit of the matched text.  The
+     * number of matched characters is the output value of offset
+     * minus the input value.  Offset should always point to the
+     * HIGH SURROGATE (leading code unit) of a pair of surrogates,
+     * both on entry and upon return.
+     * @param limit the limit index of text to be matched.  Greater
+     * than offset for a forward direction match, less than offset for
+     * a backward direction match.  The last character to be
+     * considered for matching will be text.charAt(limit-1) in the
+     * forward direction or text.charAt(limit+1) in the backward
+     * direction.
+     * @param incremental  if true, then assume further characters may
+     * be inserted at limit and check for partial matching.  Otherwise
+     * assume the text as given is complete.
+     * @return a match degree value indicating a full match, a partial
+     * match, or a mismatch.  If incremental is false then
+     * U_PARTIAL_MATCH should never be returned.
+     */
+    virtual UMatchDegree matches(const Replaceable& text,
+                                 int32_t& offset,
+                                 int32_t limit,
+                                 UBool incremental) override;
+
+    /**
+     * Implement UnicodeMatcher
+     * @param result            Output param to receive the pattern.
+     * @param escapeUnprintable if True then escape the unprintable characters.
+     * @return                  A reference to 'result'.
+     */
+    virtual UnicodeString& toPattern(UnicodeString& result,
+                                     UBool escapeUnprintable = false) const override;
+
+    /**
+     * Implement UnicodeMatcher
+     * @param v    the given index value.
+     * @return     true if this rule matches the given index value.
+     */
+    virtual UBool matchesIndexValue(uint8_t v) const override;
+
+    /**
+     * Implement UnicodeMatcher
+     */
+    virtual void addMatchSetTo(UnicodeSet& toUnionTo) const override;
+
+    /**
+     * UnicodeFunctor API
+     */
+    virtual void setData(const TransliterationRuleData*) override;
+
+    /**
+     * ICU "poor man's RTTI", returns a UClassID for the actual class.
+     */
+    virtual UClassID getDynamicClassID() const override;
+
+    /**
+     * ICU "poor man's RTTI", returns a UClassID for this class.
+     */
+    static UClassID U_EXPORT2 getStaticClassID();
+
+ private:
+
+    UnicodeFunctor* matcher; // owned
+
+    uint32_t minCount;
+
+    uint32_t maxCount;
+};
+
+U_NAMESPACE_END
+
+#endif /* #if !UCONFIG_NO_TRANSLITERATION */
+
+#endif