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Diffstat (limited to 'cpp/include/qpid/Msg.h')
-rw-r--r-- | cpp/include/qpid/Msg.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/cpp/include/qpid/Msg.h b/cpp/include/qpid/Msg.h new file mode 100644 index 0000000000..6e08a89571 --- /dev/null +++ b/cpp/include/qpid/Msg.h @@ -0,0 +1,76 @@ +#ifndef QPID_MSG_H +#define QPID_MSG_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. + * + */ + +#include <sstream> +#include <iostream> + +namespace qpid { + +/** A simple wrapper for std::ostringstream that allows + * in place construction of a message and automatic conversion + * to string. + * E.g. + *@code + * void foo(const std::string&); + * foo(Msg() << "hello " << 32); + *@endcode + * Will construct the string "hello 32" and pass it to foo() + */ +struct Msg { + std::ostringstream os; + Msg() {} + Msg(const Msg& m) : os(m.str()) {} + std::string str() const { return os.str(); } + operator std::string() const { return str(); } + + Msg& operator<<(long n) { os << n; return *this; } + Msg& operator<<(unsigned long n) { os << n; return *this; } + Msg& operator<<(bool n) { os << n; return *this; } + Msg& operator<<(short n) { os << n; return *this; } + Msg& operator<<(unsigned short n) { os << n; return *this; } + Msg& operator<<(int n) { os << n; return *this; } + Msg& operator<<(unsigned int n) { os << n; return *this; } +#ifdef _GLIBCXX_USE_LONG_LONG + Msg& operator<<(long long n) { os << n; return *this; } + Msg& operator<<(unsigned long long n) { os << n; return *this; } +#endif + Msg& operator<<(double n) { os << n; return *this; } + Msg& operator<<(float n) { os << n; return *this; } + Msg& operator<<(long double n) { os << n; return *this; } + + template <class T> Msg& operator<<(const T& t) { os <<t; return *this; } +}; + + + +inline std::ostream& operator<<(std::ostream& o, const Msg& m) { + return o << m.str(); +} + +/** Construct a message using operator << and append (file:line) */ +#define QPID_MSG(message) ::qpid::Msg() << message << " (" << __FILE__ << ":" << __LINE__ << ")" + +} // namespace qpid + +#endif /*!QPID_MSG_H*/ |