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-rw-r--r--cpp/sca/modules/eval/driver.hpp77
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diff --git a/cpp/sca/modules/eval/driver.hpp b/cpp/sca/modules/eval/driver.hpp
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-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements. See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership. The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied. See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-
-/* $Rev$ $Date$ */
-
-#ifndef tuscany_eval_driver_hpp
-#define tuscany_eval_driver_hpp
-
-/**
- * Script evaluator main driver loop.
- */
-
-#include <string>
-#include <iostream>
-#include "eval.hpp"
-
-namespace tuscany {
-namespace eval {
-
-const std::string evalOutputPrompt("; ");
-const std::string evalInputPrompt("=> ");
-
-const bool promptForInput(const std::string str, std::ostream& out) {
- out << "\n\n" << str;
- return true;
-}
-
-const bool announceOutput(const std::string str, std::ostream& out) {
- out << "\n" << str;
- return true;
-}
-
-const bool userPrint(const value val, std::ostream& out) {
- if(isCompoundProcedure(val))
- writeValue(mklist<value>(compoundProcedureSymbol, procedureParameters(val), procedureBody(val), "<procedure-env>"), out);
- writeValue(val, out);
- return true;
-}
-
-const value evalDriverLoop(std::istream& in, std::ostream& out, Env& globalEnv, const gc_pool& pool) {
- promptForInput(evalInputPrompt, out);
- value input = readValue(in);
- if (isNil(input))
- return input;
- const value output = evalExpr(input, globalEnv, pool);
- announceOutput(evalOutputPrompt, out);
- userPrint(output, out);
- return evalDriverLoop(in, out, globalEnv, pool);
-}
-
-const bool evalDriverRun(std::istream& in, std::ostream& out) {
- gc_pool pool;
- setupDisplay(out);
- Env globalEnv = setupEnvironment(pool);
- evalDriverLoop(in, out, globalEnv, pool);
- return true;
-}
-
-}
-}
-#endif /* tuscany_eval_driver_hpp */