LogHelper.h

/**
 * 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.
 */
#pragma once

#include <map>
#include <sstream>
#include <string>

template <typename Key, typename Value>
inline std::ostream& operator<<(std::ostream& os, const std::map<Key, Value>& m) {
    os << "{";
    bool first = true;
    for (const auto& kv : m) {
        if (!first) {
            os << ", ";
        } else {
            first = false;
        }
        os << kv.first << " => " << kv.second;
    }
    os << "}";
    return os;
}