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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
**********************************************************************
* Copyright (c) 2004-2015, International Business Machines
* Corporation and others. All Rights Reserved.
**********************************************************************
* Author: Alan Liu
* Created: April 26, 2004
* Since: ICU 3.0
**********************************************************************
*/
#ifndef __MEASURE_H__
#define __MEASURE_H__
#include "unicode/utypes.h"
#if U_SHOW_CPLUSPLUS_API
/**
* \file
* \brief C++ API: MeasureUnit object.
*/
#if !UCONFIG_NO_FORMATTING
#include "unicode/fmtable.h"
U_NAMESPACE_BEGIN
class MeasureUnit;
/**
* An amount of a specified unit, consisting of a number and a Unit.
* For example, a length measure consists of a number and a length
* unit, such as feet or meters.
*
* <p>Measure objects are formatted by MeasureFormat.
*
* <p>Measure objects are immutable.
*
* @author Alan Liu
* @stable ICU 3.0
*/
class U_I18N_API Measure: public UObject {
public:
/**
* Construct an object with the given numeric amount and the given
* unit. After this call, the caller must not delete the given
* unit object.
* @param number a numeric object; amount.isNumeric() must be true
* @param adoptedUnit the unit object, which must not be nullptr
* @param ec input-output error code. If the amount or the unit
* is invalid, then this will be set to a failing value.
* @stable ICU 3.0
*/
Measure(const Formattable& number, MeasureUnit* adoptedUnit,
UErrorCode& ec);
/**
* Copy constructor
* @stable ICU 3.0
*/
Measure(const Measure& other);
/**
* Assignment operator
* @stable ICU 3.0
*/
Measure& operator=(const Measure& other);
/**
* Return a polymorphic clone of this object. The result will
* have the same class as returned by getDynamicClassID().
* @stable ICU 3.0
*/
virtual Measure* clone() const;
/**
* Destructor
* @stable ICU 3.0
*/
virtual ~Measure();
/**
* Equality operator. Return true if this object is equal
* to the given object.
* @stable ICU 3.0
*/
bool operator==(const UObject& other) const;
/**
* Return a reference to the numeric value of this object. The
* numeric value may be of any numeric type supported by
* Formattable.
* @stable ICU 3.0
*/
inline const Formattable& getNumber() const;
/**
* Return a reference to the unit of this object.
* @stable ICU 3.0
*/
inline const MeasureUnit& getUnit() const;
/**
* Return the class ID for this class. This is useful only for comparing to
* a return value from getDynamicClassID(). For example:
* <pre>
* . Base* polymorphic_pointer = createPolymorphicObject();
* . if (polymorphic_pointer->getDynamicClassID() ==
* . erived::getStaticClassID()) ...
* </pre>
* @return The class ID for all objects of this class.
* @stable ICU 53
*/
static UClassID U_EXPORT2 getStaticClassID(void);
/**
* Returns a unique class ID POLYMORPHICALLY. Pure virtual override. This
* method is to implement a simple version of RTTI, since not all C++
* compilers support genuine RTTI. Polymorphic operator==() and clone()
* methods call this method.
*
* @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 53
*/
virtual UClassID getDynamicClassID(void) const override;
protected:
/**
* Default constructor.
* @stable ICU 3.0
*/
Measure();
private:
/**
* The numeric value of this object, e.g. 2.54 or 100.
*/
Formattable number;
/**
* The unit of this object, e.g., "millimeter" or "JPY". This is
* owned by this object.
*/
MeasureUnit* unit;
};
inline const Formattable& Measure::getNumber() const {
return number;
}
inline const MeasureUnit& Measure::getUnit() const {
return *unit;
}
U_NAMESPACE_END
#endif // !UCONFIG_NO_FORMATTING
#endif /* U_SHOW_CPLUSPLUS_API */
#endif // __MEASURE_H__
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