d97c0ec46c
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@943805 13f79535-47bb-0310-9956-ffa450edef68
67 lines
1.8 KiB
C++
67 lines
1.8 KiB
C++
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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/* $Rev$ $Date$ */
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/**
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* Currency converter component implementation.
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*/
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#include "string.hpp"
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#include "function.hpp"
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#include "list.hpp"
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#include "value.hpp"
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#include "monad.hpp"
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namespace tuscany {
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namespace store {
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/**
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* Convert an amount from USD to a currency.
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*/
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const failable<value> convert(unused const value& from, const value& to, const value& amount) {
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if (to == string("EUR"))
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return value(0.70 * (double)amount);
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return amount;
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}
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/**
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* Return a currency symbol.
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*/
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const failable<value> symbol(const value& currency) {
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if (currency == string("EUR"))
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return value(string("E"));
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return value(string("$"));
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}
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}
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}
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extern "C" {
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const tuscany::value apply(const tuscany::list<tuscany::value>& params) {
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const tuscany::value func(car(params));
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if (func == "convert")
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return tuscany::store::convert(cadr(params), caddr(params), cadddr(params));
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if (func == "symbol")
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return tuscany::store::symbol(cadr(params));
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return tuscany::mkfailure<tuscany::value>();
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}
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}
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