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760 lines
24 KiB
760 lines
24 KiB
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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********************************************************************************
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* Copyright (C) 1997-2014, International Business Machines
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* Corporation and others. All Rights Reserved.
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********************************************************************************
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*
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* File FMTABLE.H
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*
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* Modification History:
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*
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* Date Name Description
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* 02/29/97 aliu Creation.
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********************************************************************************
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*/
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#ifndef FMTABLE_H
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#define FMTABLE_H
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#include "unicode/utypes.h"
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#if U_SHOW_CPLUSPLUS_API
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/**
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* \file
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* \brief C++ API: Formattable is a thin wrapper for primitive types used for formatting and parsing
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*/
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#if !UCONFIG_NO_FORMATTING
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#include "unicode/unistr.h"
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#include "unicode/stringpiece.h"
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#include "unicode/uformattable.h"
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U_NAMESPACE_BEGIN
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class CharString;
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namespace number {
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namespace impl {
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class DecimalQuantity;
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}
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}
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/**
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* Formattable objects can be passed to the Format class or
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* its subclasses for formatting. Formattable is a thin wrapper
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* class which interconverts between the primitive numeric types
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* (double, long, etc.) as well as UDate and UnicodeString.
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*
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* <p>Internally, a Formattable object is a union of primitive types.
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* As such, it can only store one flavor of data at a time. To
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* determine what flavor of data it contains, use the getType method.
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*
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* <p>As of ICU 3.0, Formattable may also wrap a UObject pointer,
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* which it owns. This allows an instance of any ICU class to be
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* encapsulated in a Formattable. For legacy reasons and for
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* efficiency, primitive numeric types are still stored directly
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* within a Formattable.
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*
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* <p>The Formattable class is not suitable for subclassing.
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*
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* <p>See UFormattable for a C wrapper.
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*/
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class U_I18N_API Formattable : public UObject {
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public:
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/**
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* This enum is only used to let callers distinguish between
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* the Formattable(UDate) constructor and the Formattable(double)
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* constructor; the compiler cannot distinguish the signatures,
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* since UDate is currently typedefed to be either double or long.
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* If UDate is changed later to be a bonafide class
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* or struct, then we no longer need this enum.
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* @stable ICU 2.4
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*/
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enum ISDATE { kIsDate };
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/**
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* Default constructor
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* @stable ICU 2.4
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*/
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Formattable(); // Type kLong, value 0
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/**
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* Creates a Formattable object with a UDate instance.
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* @param d the UDate instance.
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* @param flag the flag to indicate this is a date. Always set it to kIsDate
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* @stable ICU 2.0
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*/
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Formattable(UDate d, ISDATE flag);
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/**
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* Creates a Formattable object with a double number.
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* @param d the double number.
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* @stable ICU 2.0
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*/
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Formattable(double d);
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/**
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* Creates a Formattable object with a long number.
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* @param l the long number.
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* @stable ICU 2.0
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*/
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Formattable(int32_t l);
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/**
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* Creates a Formattable object with an int64_t number
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* @param ll the int64_t number.
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* @stable ICU 2.8
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*/
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Formattable(int64_t ll);
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#if !UCONFIG_NO_CONVERSION
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/**
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* Creates a Formattable object with a char string pointer.
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* Assumes that the char string is null terminated.
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* @param strToCopy the char string.
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* @stable ICU 2.0
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*/
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Formattable(const char* strToCopy);
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#endif
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/**
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* Creates a Formattable object of an appropriate numeric type from a
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* a decimal number in string form. The Formattable will retain the
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* full precision of the input in decimal format, even when it exceeds
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* what can be represented by a double or int64_t.
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*
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* @param number the unformatted (not localized) string representation
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* of the Decimal number.
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* @param status the error code. Possible errors include U_INVALID_FORMAT_ERROR
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* if the format of the string does not conform to that of a
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* decimal number.
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* @stable ICU 4.4
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*/
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Formattable(StringPiece number, UErrorCode &status);
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/**
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* Creates a Formattable object with a UnicodeString object to copy from.
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* @param strToCopy the UnicodeString string.
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* @stable ICU 2.0
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*/
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Formattable(const UnicodeString& strToCopy);
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/**
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* Creates a Formattable object with a UnicodeString object to adopt from.
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* @param strToAdopt the UnicodeString string.
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* @stable ICU 2.0
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*/
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Formattable(UnicodeString* strToAdopt);
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/**
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* Creates a Formattable object with an array of Formattable objects.
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* @param arrayToCopy the Formattable object array.
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* @param count the array count.
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* @stable ICU 2.0
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*/
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Formattable(const Formattable* arrayToCopy, int32_t count);
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/**
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* Creates a Formattable object that adopts the given UObject.
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* @param objectToAdopt the UObject to set this object to
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* @stable ICU 3.0
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*/
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Formattable(UObject* objectToAdopt);
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/**
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* Copy constructor.
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* @stable ICU 2.0
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*/
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Formattable(const Formattable&);
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/**
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* Assignment operator.
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* @param rhs The Formattable object to copy into this object.
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* @stable ICU 2.0
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*/
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Formattable& operator=(const Formattable &rhs);
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/**
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* Equality comparison.
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* @param other the object to be compared with.
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* @return true if other are equal to this, false otherwise.
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* @stable ICU 2.0
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*/
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UBool operator==(const Formattable &other) const;
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/**
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* Equality operator.
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* @param other the object to be compared with.
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* @return true if other are unequal to this, false otherwise.
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* @stable ICU 2.0
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*/
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UBool operator!=(const Formattable& other) const
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{ return !operator==(other); }
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/**
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* Destructor.
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* @stable ICU 2.0
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*/
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virtual ~Formattable();
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/**
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* Clone this object.
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* Clones can be used concurrently in multiple threads.
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* If an error occurs, then NULL is returned.
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* The caller must delete the clone.
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*
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* @return a clone of this object
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*
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* @see getDynamicClassID
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* @stable ICU 2.8
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*/
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Formattable *clone() const;
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/**
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* Selector for flavor of data type contained within a
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* Formattable object. Formattable is a union of several
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* different types, and at any time contains exactly one type.
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* @stable ICU 2.4
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*/
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enum Type {
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/**
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* Selector indicating a UDate value. Use getDate to retrieve
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* the value.
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* @stable ICU 2.4
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*/
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kDate,
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/**
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* Selector indicating a double value. Use getDouble to
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* retrieve the value.
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* @stable ICU 2.4
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*/
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kDouble,
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/**
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* Selector indicating a 32-bit integer value. Use getLong to
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* retrieve the value.
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* @stable ICU 2.4
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*/
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kLong,
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/**
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* Selector indicating a UnicodeString value. Use getString
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* to retrieve the value.
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* @stable ICU 2.4
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*/
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kString,
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/**
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* Selector indicating an array of Formattables. Use getArray
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* to retrieve the value.
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* @stable ICU 2.4
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*/
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kArray,
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/**
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* Selector indicating a 64-bit integer value. Use getInt64
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* to retrieve the value.
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* @stable ICU 2.8
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*/
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kInt64,
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/**
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* Selector indicating a UObject value. Use getObject to
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* retrieve the value.
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* @stable ICU 3.0
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*/
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kObject
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};
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/**
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* Gets the data type of this Formattable object.
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* @return the data type of this Formattable object.
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* @stable ICU 2.0
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*/
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Type getType(void) const;
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/**
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* Returns true if the data type of this Formattable object
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* is kDouble, kLong, or kInt64
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* @return true if this is a pure numeric object
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* @stable ICU 3.0
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*/
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UBool isNumeric() const;
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/**
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* Gets the double value of this object. If this object is not of type
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* kDouble then the result is undefined.
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* @return the double value of this object.
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* @stable ICU 2.0
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*/
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double getDouble(void) const { return fValue.fDouble; }
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/**
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* Gets the double value of this object. If this object is of type
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* long, int64 or Decimal Number then a conversion is peformed, with
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* possible loss of precision. If the type is kObject and the
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* object is a Measure, then the result of
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* getNumber().getDouble(status) is returned. If this object is
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* neither a numeric type nor a Measure, then 0 is returned and
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* the status is set to U_INVALID_FORMAT_ERROR.
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* @param status the error code
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* @return the double value of this object.
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* @stable ICU 3.0
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*/
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double getDouble(UErrorCode& status) const;
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/**
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* Gets the long value of this object. If this object is not of type
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* kLong then the result is undefined.
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* @return the long value of this object.
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* @stable ICU 2.0
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*/
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int32_t getLong(void) const { return (int32_t)fValue.fInt64; }
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/**
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* Gets the long value of this object. If the magnitude is too
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* large to fit in a long, then the maximum or minimum long value,
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* as appropriate, is returned and the status is set to
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* U_INVALID_FORMAT_ERROR. If this object is of type kInt64 and
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* it fits within a long, then no precision is lost. If it is of
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* type kDouble, then a conversion is peformed, with
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* truncation of any fractional part. If the type is kObject and
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* the object is a Measure, then the result of
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* getNumber().getLong(status) is returned. If this object is
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* neither a numeric type nor a Measure, then 0 is returned and
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* the status is set to U_INVALID_FORMAT_ERROR.
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* @param status the error code
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* @return the long value of this object.
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* @stable ICU 3.0
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*/
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int32_t getLong(UErrorCode& status) const;
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/**
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* Gets the int64 value of this object. If this object is not of type
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* kInt64 then the result is undefined.
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* @return the int64 value of this object.
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* @stable ICU 2.8
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*/
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int64_t getInt64(void) const { return fValue.fInt64; }
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/**
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* Gets the int64 value of this object. If this object is of a numeric
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* type and the magnitude is too large to fit in an int64, then
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* the maximum or minimum int64 value, as appropriate, is returned
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* and the status is set to U_INVALID_FORMAT_ERROR. If the
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* magnitude fits in an int64, then a casting conversion is
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* peformed, with truncation of any fractional part. If the type
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* is kObject and the object is a Measure, then the result of
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* getNumber().getDouble(status) is returned. If this object is
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* neither a numeric type nor a Measure, then 0 is returned and
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* the status is set to U_INVALID_FORMAT_ERROR.
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* @param status the error code
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* @return the int64 value of this object.
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* @stable ICU 3.0
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*/
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int64_t getInt64(UErrorCode& status) const;
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/**
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* Gets the Date value of this object. If this object is not of type
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* kDate then the result is undefined.
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* @return the Date value of this object.
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* @stable ICU 2.0
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*/
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UDate getDate() const { return fValue.fDate; }
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/**
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* Gets the Date value of this object. If the type is not a date,
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* status is set to U_INVALID_FORMAT_ERROR and the return value is
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* undefined.
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* @param status the error code.
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* @return the Date value of this object.
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* @stable ICU 3.0
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*/
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UDate getDate(UErrorCode& status) const;
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/**
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* Gets the string value of this object. If this object is not of type
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* kString then the result is undefined.
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* @param result Output param to receive the Date value of this object.
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* @return A reference to 'result'.
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* @stable ICU 2.0
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*/
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UnicodeString& getString(UnicodeString& result) const
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{ result=*fValue.fString; return result; }
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/**
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* Gets the string value of this object. If the type is not a
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* string, status is set to U_INVALID_FORMAT_ERROR and a bogus
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* string is returned.
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* @param result Output param to receive the Date value of this object.
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* @param status the error code.
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* @return A reference to 'result'.
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* @stable ICU 3.0
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*/
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UnicodeString& getString(UnicodeString& result, UErrorCode& status) const;
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/**
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* Gets a const reference to the string value of this object. If
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* this object is not of type kString then the result is
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* undefined.
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* @return a const reference to the string value of this object.
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* @stable ICU 2.0
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*/
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inline const UnicodeString& getString(void) const;
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/**
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* Gets a const reference to the string value of this object. If
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* the type is not a string, status is set to
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* U_INVALID_FORMAT_ERROR and the result is a bogus string.
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* @param status the error code.
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* @return a const reference to the string value of this object.
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* @stable ICU 3.0
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*/
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const UnicodeString& getString(UErrorCode& status) const;
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/**
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* Gets a reference to the string value of this object. If this
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* object is not of type kString then the result is undefined.
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* @return a reference to the string value of this object.
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* @stable ICU 2.0
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*/
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inline UnicodeString& getString(void);
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/**
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* Gets a reference to the string value of this object. If the
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* type is not a string, status is set to U_INVALID_FORMAT_ERROR
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* and the result is a bogus string.
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* @param status the error code.
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* @return a reference to the string value of this object.
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* @stable ICU 3.0
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*/
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UnicodeString& getString(UErrorCode& status);
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/**
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* Gets the array value and count of this object. If this object
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* is not of type kArray then the result is undefined.
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* @param count fill-in with the count of this object.
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* @return the array value of this object.
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* @stable ICU 2.0
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*/
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const Formattable* getArray(int32_t& count) const
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{ count=fValue.fArrayAndCount.fCount; return fValue.fArrayAndCount.fArray; }
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/**
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* Gets the array value and count of this object. If the type is
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* not an array, status is set to U_INVALID_FORMAT_ERROR, count is
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* set to 0, and the result is NULL.
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* @param count fill-in with the count of this object.
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* @param status the error code.
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* @return the array value of this object.
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* @stable ICU 3.0
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*/
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const Formattable* getArray(int32_t& count, UErrorCode& status) const;
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/**
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* Accesses the specified element in the array value of this
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* Formattable object. If this object is not of type kArray then
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* the result is undefined.
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* @param index the specified index.
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* @return the accessed element in the array.
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* @stable ICU 2.0
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*/
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Formattable& operator[](int32_t index) { return fValue.fArrayAndCount.fArray[index]; }
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/**
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* Returns a pointer to the UObject contained within this
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* formattable, or NULL if this object does not contain a UObject.
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* @return a UObject pointer, or NULL
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* @stable ICU 3.0
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*/
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const UObject* getObject() const;
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/**
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* Returns a numeric string representation of the number contained within this
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* formattable, or NULL if this object does not contain numeric type.
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* For values obtained by parsing, the returned decimal number retains
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* the full precision and range of the original input, unconstrained by
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* the limits of a double floating point or a 64 bit int.
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*
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* This function is not thread safe, and therfore is not declared const,
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* even though it is logically const.
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*
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* Possible errors include U_MEMORY_ALLOCATION_ERROR, and
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* U_INVALID_STATE if the formattable object has not been set to
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* a numeric type.
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*
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* @param status the error code.
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* @return the unformatted string representation of a number.
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* @stable ICU 4.4
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*/
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StringPiece getDecimalNumber(UErrorCode &status);
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/**
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* Sets the double value of this object and changes the type to
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* kDouble.
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* @param d the new double value to be set.
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* @stable ICU 2.0
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*/
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void setDouble(double d);
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/**
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* Sets the long value of this object and changes the type to
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* kLong.
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* @param l the new long value to be set.
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* @stable ICU 2.0
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*/
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void setLong(int32_t l);
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/**
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* Sets the int64 value of this object and changes the type to
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* kInt64.
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* @param ll the new int64 value to be set.
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* @stable ICU 2.8
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*/
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void setInt64(int64_t ll);
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/**
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* Sets the Date value of this object and changes the type to
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* kDate.
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* @param d the new Date value to be set.
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* @stable ICU 2.0
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*/
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void setDate(UDate d);
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/**
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* Sets the string value of this object and changes the type to
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* kString.
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* @param stringToCopy the new string value to be set.
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* @stable ICU 2.0
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*/
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void setString(const UnicodeString& stringToCopy);
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/**
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* Sets the array value and count of this object and changes the
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* type to kArray.
|
|
* @param array the array value.
|
|
* @param count the number of array elements to be copied.
|
|
* @stable ICU 2.0
|
|
*/
|
|
void setArray(const Formattable* array, int32_t count);
|
|
|
|
/**
|
|
* Sets and adopts the string value and count of this object and
|
|
* changes the type to kArray.
|
|
* @param stringToAdopt the new string value to be adopted.
|
|
* @stable ICU 2.0
|
|
*/
|
|
void adoptString(UnicodeString* stringToAdopt);
|
|
|
|
/**
|
|
* Sets and adopts the array value and count of this object and
|
|
* changes the type to kArray.
|
|
* @stable ICU 2.0
|
|
*/
|
|
void adoptArray(Formattable* array, int32_t count);
|
|
|
|
/**
|
|
* Sets and adopts the UObject value of this object and changes
|
|
* the type to kObject. After this call, the caller must not
|
|
* delete the given object.
|
|
* @param objectToAdopt the UObject value to be adopted
|
|
* @stable ICU 3.0
|
|
*/
|
|
void adoptObject(UObject* objectToAdopt);
|
|
|
|
/**
|
|
* Sets the the numeric value from a decimal number string, and changes
|
|
* the type to to a numeric type appropriate for the number.
|
|
* The syntax of the number is a "numeric string"
|
|
* as defined in the Decimal Arithmetic Specification, available at
|
|
* http://speleotrove.com/decimal
|
|
* The full precision and range of the input number will be retained,
|
|
* even when it exceeds what can be represented by a double or an int64.
|
|
*
|
|
* @param numberString a string representation of the unformatted decimal number.
|
|
* @param status the error code. Set to U_INVALID_FORMAT_ERROR if the
|
|
* incoming string is not a valid decimal number.
|
|
* @stable ICU 4.4
|
|
*/
|
|
void setDecimalNumber(StringPiece numberString,
|
|
UErrorCode &status);
|
|
|
|
/**
|
|
* ICU "poor man's RTTI", returns a UClassID for the actual class.
|
|
*
|
|
* @stable ICU 2.2
|
|
*/
|
|
virtual UClassID getDynamicClassID() const;
|
|
|
|
/**
|
|
* ICU "poor man's RTTI", returns a UClassID for this class.
|
|
*
|
|
* @stable ICU 2.2
|
|
*/
|
|
static UClassID U_EXPORT2 getStaticClassID();
|
|
|
|
/**
|
|
* Convert the UFormattable to a Formattable. Internally, this is a reinterpret_cast.
|
|
* @param fmt a valid UFormattable
|
|
* @return the UFormattable as a Formattable object pointer. This is an alias to the original
|
|
* UFormattable, and so is only valid while the original argument remains in scope.
|
|
* @stable ICU 52
|
|
*/
|
|
static inline Formattable *fromUFormattable(UFormattable *fmt);
|
|
|
|
/**
|
|
* Convert the const UFormattable to a const Formattable. Internally, this is a reinterpret_cast.
|
|
* @param fmt a valid UFormattable
|
|
* @return the UFormattable as a Formattable object pointer. This is an alias to the original
|
|
* UFormattable, and so is only valid while the original argument remains in scope.
|
|
* @stable ICU 52
|
|
*/
|
|
static inline const Formattable *fromUFormattable(const UFormattable *fmt);
|
|
|
|
/**
|
|
* Convert this object pointer to a UFormattable.
|
|
* @return this object as a UFormattable pointer. This is an alias to this object,
|
|
* and so is only valid while this object remains in scope.
|
|
* @stable ICU 52
|
|
*/
|
|
inline UFormattable *toUFormattable();
|
|
|
|
/**
|
|
* Convert this object pointer to a UFormattable.
|
|
* @return this object as a UFormattable pointer. This is an alias to this object,
|
|
* and so is only valid while this object remains in scope.
|
|
* @stable ICU 52
|
|
*/
|
|
inline const UFormattable *toUFormattable() const;
|
|
|
|
#ifndef U_HIDE_DEPRECATED_API
|
|
/**
|
|
* Deprecated variant of getLong(UErrorCode&).
|
|
* @param status the error code
|
|
* @return the long value of this object.
|
|
* @deprecated ICU 3.0 use getLong(UErrorCode&) instead
|
|
*/
|
|
inline int32_t getLong(UErrorCode* status) const;
|
|
#endif /* U_HIDE_DEPRECATED_API */
|
|
|
|
#ifndef U_HIDE_INTERNAL_API
|
|
/**
|
|
* Internal function, do not use.
|
|
* TODO: figure out how to make this be non-public.
|
|
* NumberFormat::format(Formattable, ...
|
|
* needs to get at the DecimalQuantity, if it exists, for
|
|
* big decimal formatting.
|
|
* @internal
|
|
*/
|
|
number::impl::DecimalQuantity *getDecimalQuantity() const { return fDecimalQuantity;}
|
|
|
|
/**
|
|
* Export the value of this Formattable to a DecimalQuantity.
|
|
* @internal
|
|
*/
|
|
void populateDecimalQuantity(number::impl::DecimalQuantity& output, UErrorCode& status) const;
|
|
|
|
/**
|
|
* Adopt, and set value from, a DecimalQuantity
|
|
* Internal Function, do not use.
|
|
* @param dq the DecimalQuantity to be adopted
|
|
* @internal
|
|
*/
|
|
void adoptDecimalQuantity(number::impl::DecimalQuantity *dq);
|
|
|
|
/**
|
|
* Internal function to return the CharString pointer.
|
|
* @param status error code
|
|
* @return pointer to the CharString - may become invalid if the object is modified
|
|
* @internal
|
|
*/
|
|
CharString *internalGetCharString(UErrorCode &status);
|
|
|
|
#endif /* U_HIDE_INTERNAL_API */
|
|
|
|
private:
|
|
/**
|
|
* Cleans up the memory for unwanted values. For example, the adopted
|
|
* string or array objects.
|
|
*/
|
|
void dispose(void);
|
|
|
|
/**
|
|
* Common initialization, for use by constructors.
|
|
*/
|
|
void init();
|
|
|
|
UnicodeString* getBogus() const;
|
|
|
|
union {
|
|
UObject* fObject;
|
|
UnicodeString* fString;
|
|
double fDouble;
|
|
int64_t fInt64;
|
|
UDate fDate;
|
|
struct {
|
|
Formattable* fArray;
|
|
int32_t fCount;
|
|
} fArrayAndCount;
|
|
} fValue;
|
|
|
|
CharString *fDecimalStr;
|
|
|
|
number::impl::DecimalQuantity *fDecimalQuantity;
|
|
|
|
Type fType;
|
|
UnicodeString fBogus; // Bogus string when it's needed.
|
|
};
|
|
|
|
inline UDate Formattable::getDate(UErrorCode& status) const {
|
|
if (fType != kDate) {
|
|
if (U_SUCCESS(status)) {
|
|
status = U_INVALID_FORMAT_ERROR;
|
|
}
|
|
return 0;
|
|
}
|
|
return fValue.fDate;
|
|
}
|
|
|
|
inline const UnicodeString& Formattable::getString(void) const {
|
|
return *fValue.fString;
|
|
}
|
|
|
|
inline UnicodeString& Formattable::getString(void) {
|
|
return *fValue.fString;
|
|
}
|
|
|
|
#ifndef U_HIDE_DEPRECATED_API
|
|
inline int32_t Formattable::getLong(UErrorCode* status) const {
|
|
return getLong(*status);
|
|
}
|
|
#endif /* U_HIDE_DEPRECATED_API */
|
|
|
|
inline UFormattable* Formattable::toUFormattable() {
|
|
return reinterpret_cast<UFormattable*>(this);
|
|
}
|
|
|
|
inline const UFormattable* Formattable::toUFormattable() const {
|
|
return reinterpret_cast<const UFormattable*>(this);
|
|
}
|
|
|
|
inline Formattable* Formattable::fromUFormattable(UFormattable *fmt) {
|
|
return reinterpret_cast<Formattable *>(fmt);
|
|
}
|
|
|
|
inline const Formattable* Formattable::fromUFormattable(const UFormattable *fmt) {
|
|
return reinterpret_cast<const Formattable *>(fmt);
|
|
}
|
|
|
|
U_NAMESPACE_END
|
|
|
|
#endif /* #if !UCONFIG_NO_FORMATTING */
|
|
|
|
#endif /* U_SHOW_CPLUSPLUS_API */
|
|
|
|
#endif //_FMTABLE
|
|
//eof
|