【发布时间】:2011-07-04 15:29:30
【问题描述】:
我正在尝试构建和运行 Boost.log 的教程示例,并遇到编译器错误,这让我很困惑,需要一些帮助。基本细节;我已经在 OS X 上构建了包含 boost.log 的 boost,但是当我尝试编译任何教程示例时,我从 boost 日志的 'trivial.hpp' 包含文件中得到一个重载的 'operator>>' 错误。
错误报告在
log/utility/explicit_operator_bool.hpp
这是堆栈:
/usr/local/include/boost/log/utility/explicit_operator_bool.hpp:67:29: error: overloaded 'operator>>' must have at least one parameter of class or enumeration type [2]
In file included from /usr/local/include/boost/log/attributes/attribute_name.hpp:27:
In file included from /usr/local/include/boost/log/attributes/attribute_set.hpp:28:
In file included from /usr/local/include/boost/log/sources/basic_logger.hpp:37:
In file included from /usr/local/include/boost/log/sources/severity_logger.hpp:27:
In file included from /usr/local/include/boost/log/trivial.hpp:25:
In file included from /Volumes/Macintosh HD 2/code/Logging Tut 1/loggingTut1/loggingTut1/main.cpp:18:
Overloaded 'operator>>' must have at least one parameter of class or enumeration type in /usr/local/include/boost/log/utility/explicit_operator_bool.hpp
环顾四周,看看是否有其他人有类似的情况,但我一无所获 - 谁能解释我错过了什么或问题可能是什么?
详情:
我正在使用 Xcode 4.0.2 在 OS X (10.6.8) 上尝试这个
我已经下载并构建了 1_46_1 boost 版本,它适用于我的主要基于 boost 的项目(使用 Boost Asio、boost 线程等)。
Boost.log 还没有在主版本中,所以我从 sourceforge 下载了它,就像这个问题一样:
boost-log-how-to-get-it-and-how-to-build-it
我将下载的分支中的boost/log目录复制到boost_1_46_1/boost/log目录中,将libs/log目录复制到boost_1_46_1/libs/log中
我从/usr/local/include/boost 和/usr/local/lib 中删除了所有增强功能,然后使用以下命令重新构建:
./bootstrap.sh --with-libraries=all --prefix=/usr/local --includedir=/usr/local/include --libdir=/usr/local/lib
紧随其后
sudo ./bjam install > build.log
我检查了输出是否有错误,它看起来很干净 - 没有任何报告。我在/usr/local 下拥有所有的 boost 库和头文件。我检查了我的 Asio 项目,并且在这个版本中一切正常(没有提升日志)。我为日志教程创建了一个新项目,设置了库路径和包含路径,并将 lboost_log 添加到链接器选项中。
在尝试使用 Boost 日志的教程程序时会出现问题 - 如 Boost Log 文档 here 或 svn here 文件中包含的示例中所述
来自 SVN 的示例如下所示:
/*
* Copyright Andrey Semashev 2007 - 2011.
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt or copy at
* http://www.boost.org/LICENSE_1_0.txt)
*/
/*!
* \file main.cpp
* \author Andrey Semashev
* \date 07.11.2009
*
* \brief An example of trivial logging.
*/
// #define BOOST_ALL_DYN_LINK 1
// #define BOOST_LOG_DYN_LINK 1
#include <boost/log/trivial.hpp>
#include <boost/log/core.hpp>
#include <boost/log/filters.hpp>
int main(int argc, char* argv[])
{
// Trivial logging: all log records are written into a file
BOOST_LOG_TRIVIAL(trace) << "A trace severity message";
BOOST_LOG_TRIVIAL(debug) << "A debug severity message";
BOOST_LOG_TRIVIAL(info) << "An informational severity message";
BOOST_LOG_TRIVIAL(warning) << "A warning severity message";
BOOST_LOG_TRIVIAL(error) << "An error severity message";
BOOST_LOG_TRIVIAL(fatal) << "A fatal severity message";
// Filtering may also be applied
using namespace boost::log;
core::get()->set_filter
(
filters::attr< trivial::severity_level >("Severity") >= trivial::info
);
// Now the first two lines will not pass the filter
BOOST_LOG_TRIVIAL(trace) << "A trace severity message";
BOOST_LOG_TRIVIAL(debug) << "A debug severity message";
BOOST_LOG_TRIVIAL(info) << "An informational severity message";
BOOST_LOG_TRIVIAL(warning) << "A warning severity message";
BOOST_LOG_TRIVIAL(error) << "An error severity message";
BOOST_LOG_TRIVIAL(fatal) << "A fatal severity message";
return 0;
}
当我构建代码时,出现两个错误:
语义问题 重载的 'operator>>' 必须至少有一个类或枚举类型的参数 语义问题 重载的 'operator
并且在来自 Boost Log 的文件 explicit_operator_bool.hpp 中报告了错误:
.
.
.
} // namespace boost
// These operators are not found through ADL
template< typename T > void operator<< (T const&, boost::log::aux::unspecified_bool_type);
template< typename T > void operator>> (T const&, boost::log::aux::unspecified_bool_type);
#define BOOST_LOG_EXPLICIT_OPERATOR_BOOL()\
.
.
.
我在Xcode中得到的堆栈如下:
/usr/local/include/boost/log/utility/explicit_operator_bool.hpp:67:29: error: overloaded 'operator>>' must have at least one parameter of class or enumeration type [2]
In file included from /usr/local/include/boost/log/attributes/attribute_name.hpp:27:
In file included from /usr/local/include/boost/log/attributes/attribute_set.hpp:28:
In file included from /usr/local/include/boost/log/sources/basic_logger.hpp:37:
In file included from /usr/local/include/boost/log/sources/severity_logger.hpp:27:
In file included from /usr/local/include/boost/log/trivial.hpp:25:
In file included from /Volumes/Macintosh HD 2/code/Logging Tut 1/loggingTut1/loggingTut1/main.cpp:18:
Overloaded 'operator>>' must have at least one parameter of class or enumeration type in /usr/local/include/boost/log/utility/explicit_operator_bool.hpp
【问题讨论】:
-
boost::log 还不是受支持的 boost 库。因此,它不能在每个可以想象的平台和编译器上编译也就不足为奇了..