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/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

 Copyright (C) 2004 Decillion Pty(Ltd)
 Copyright (C) 2004, 2005, 2006, 2007 StatPro Italia srl

 This file is part of QuantLib, a free-software/open-source library
 for financial quantitative analysts and developers - http://quantlib.org/

 QuantLib is free software: you can redistribute it and/or modify it
 under the terms of the QuantLib license.  You should have received a
 copy of the license along with this program; if not, please email
 <quantlib-dev@lists.sf.net>. The license is also available online at

 This program is distributed in the hope that it will be useful, but WITHOUT
 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 FOR A PARTICULAR PURPOSE.  See the license for more details.

/*! \file currency.hpp
    \brief Currency specification

#ifndef quantlib_currency_hpp
#define quantlib_currency_hpp

#include <ql/math/rounding.hpp>
#include <ql/errors.hpp>
#include <ostream>

namespace QuantLib {

    //! %Currency specification
00035     class Currency {
        //! default constructor
        /*! Instances built via this constructor have undefined
            behavior. Such instances can only act as placeholders
            and must be reassigned to a valid currency before being
        //! \name Inspectors
        //! currency name, e.g, "U.S. Dollar"
        const std::string& name() const;
        //! ISO 4217 three-letter code, e.g, "USD"
        const std::string& code() const;
        //! ISO 4217 numeric code, e.g, "840"
        Integer numericCode() const;
        //! symbol, e.g, "$"
        const std::string& symbol() const;
        //! fraction symbol, e.g, ""
        const std::string& fractionSymbol() const;
        //! number of fractionary parts in a unit, e.g, 100
        Integer fractionsPerUnit() const;
        //! rounding convention
        const Rounding& rounding() const;
        //! output format
        /*! The format will be fed three positional parameters,
            namely, value, code, and symbol, in this order.
        std::string format() const;
        //! \name Other information
        //! is this a usable instance?
        bool empty() const;
        //! currency used for triangulated exchange when required
        const Currency& triangulationCurrency() const;
        struct Data;
        boost::shared_ptr<Data> data_;

    struct Currency::Data {
        std::string name, code;
        Integer numeric;
        std::string symbol, fractionSymbol;
        Integer fractionsPerUnit;
        Rounding rounding;
        Currency triangulated;
        std::string formatString;

        Data(const std::string& name,
             const std::string& code,
             Integer numericCode,
             const std::string& symbol,
             const std::string& fractionSymbol,
             Integer fractionsPerUnit,
             const Rounding& rounding,
             const std::string& formatString,
             const Currency& triangulationCurrency = Currency());

    /*! \relates Currency */
    bool operator==(const Currency&,
                    const Currency&);

    /*! \relates Currency */
    bool operator!=(const Currency&,
                    const Currency&);

    /*! \relates Currency */
    std::ostream& operator<<(std::ostream&,
                             const Currency&);

    // inline definitions

00113     inline Currency::Currency() {}

00115     inline const std::string& Currency::name() const {
        return data_->name;

00119     inline const std::string& Currency::code() const {
        return data_->code;

00123     inline Integer Currency::numericCode() const {
        return data_->numeric;

00127     inline const std::string& Currency::symbol() const {
        return data_->symbol;

00131     inline const std::string& Currency::fractionSymbol() const {
        return data_->fractionSymbol;

00135     inline Integer Currency::fractionsPerUnit() const {
        return data_->fractionsPerUnit;

00139     inline const Rounding& Currency::rounding() const {
        return data_->rounding;

00143     inline std::string Currency::format() const {
        return data_->formatString;

00147     inline bool Currency::empty() const {
        return !data_;

00151     inline const Currency& Currency::triangulationCurrency() const {
        return data_->triangulated;

00155     inline bool operator==(const Currency& c1, const Currency& c2) {
        return c1.name() == c2.name();

00159     inline bool operator!=(const Currency& c1, const Currency& c2) {
        return !(c1 == c2);



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