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diff --git a/intl/icu/source/i18n/unicode/tmunit.h b/intl/icu/source/i18n/unicode/tmunit.h
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+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+ *******************************************************************************
+ * Copyright (C) 2009-2016, International Business Machines Corporation,       *
+ * Google, and others. All Rights Reserved.                                    *
+ *******************************************************************************
+ */
+
+#ifndef __TMUNIT_H__
+#define __TMUNIT_H__
+
+
+/**
+ * \file
+ * \brief C++ API: time unit object
+ */
+
+#include "unicode/utypes.h"
+
+#if U_SHOW_CPLUSPLUS_API
+
+#include "unicode/measunit.h"
+
+#if !UCONFIG_NO_FORMATTING
+
+U_NAMESPACE_BEGIN
+
+/**
+ * Measurement unit for time units.
+ * @see TimeUnitAmount
+ * @see TimeUnit
+ * @stable ICU 4.2
+ */
+class U_I18N_API TimeUnit: public MeasureUnit {
+public:
+    /**
+     * Constants for all the time units we supported.
+     * @stable ICU 4.2
+     */
+    enum UTimeUnitFields {
+        UTIMEUNIT_YEAR,
+        UTIMEUNIT_MONTH,
+        UTIMEUNIT_DAY,
+        UTIMEUNIT_WEEK,
+        UTIMEUNIT_HOUR,
+        UTIMEUNIT_MINUTE,
+        UTIMEUNIT_SECOND,
+#ifndef U_HIDE_DEPRECATED_API
+        /**
+         * One more than the highest normal UTimeUnitFields value.
+         * @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420.
+         */
+        UTIMEUNIT_FIELD_COUNT
+#endif  // U_HIDE_DEPRECATED_API
+    };
+
+    /**
+     * Create Instance.
+     * @param timeUnitField  time unit field based on which the instance
+     *                       is created.
+     * @param status         input-output error code.
+     *                       If the timeUnitField is invalid,
+     *                       then this will be set to U_ILLEGAL_ARGUMENT_ERROR.
+     * @return               a TimeUnit instance
+     * @stable ICU 4.2
+     */
+    static TimeUnit* U_EXPORT2 createInstance(UTimeUnitFields timeUnitField,
+                                              UErrorCode& status);
+
+
+    /**
+     * Override clone.
+     * @stable ICU 4.2
+     */
+    virtual TimeUnit* clone() const override;
+
+    /**
+     * Copy operator.
+     * @stable ICU 4.2
+     */
+    TimeUnit(const TimeUnit& other);
+
+    /**
+     * Assignment operator.
+     * @stable ICU 4.2
+     */
+    TimeUnit& operator=(const TimeUnit& other);
+
+    /**
+     * Returns a unique class ID for this object POLYMORPHICALLY.
+     * This method implements a simple form of RTTI used by ICU.
+     * @return The class ID for this object. All objects of a given
+     * class have the same class ID.  Objects of other classes have
+     * different class IDs.
+     * @stable ICU 4.2
+     */
+    virtual UClassID getDynamicClassID() const override;
+
+    /**
+     * Returns the class ID for this class. This is used to compare to
+     * the return value of getDynamicClassID().
+     * @return The class ID for all objects of this class.
+     * @stable ICU 4.2
+     */
+    static UClassID U_EXPORT2 getStaticClassID();
+
+
+    /**
+     * Get time unit field.
+     * @return time unit field.
+     * @stable ICU 4.2
+     */
+    UTimeUnitFields getTimeUnitField() const;
+
+    /**
+     * Destructor.
+     * @stable ICU 4.2
+     */
+    virtual ~TimeUnit();
+
+private:
+    UTimeUnitFields fTimeUnitField;
+
+    /**
+     * Constructor
+     * @internal (private)
+     */
+    TimeUnit(UTimeUnitFields timeUnitField);
+
+};
+
+
+U_NAMESPACE_END
+
+#endif /* #if !UCONFIG_NO_FORMATTING */
+
+#endif /* U_SHOW_CPLUSPLUS_API */
+
+#endif // __TMUNIT_H__
+//eof
+//