将 Boost 标头包含在 .h 文件中但不包含在.cpp文件中时出错

Error occuring when including Boost headers into .h files but not in .cpp files

本文关键字：文件 包含 出错 cpp Boost      更新时间：2023-10-16

我正在处理一个奇怪的问题。我有一个代码，我需要使用 Boost 类型索引框架实现几个宏。由于我的宏仅包含在头文件中，因此我希望#include <boost/type_index.hpp> 仅包含在头文件中，如下所示：

#include <stdexcept>
#include <boost/type_index.hpp>
#ifdef L4N_DEBUG
#define ERR_MSG(msg) std::string(boost::typeindex::type_id_with_cvr<decltype(*this)>().pretty_name()) + "::" + __func__ + "(): " + msg + " (" +__FILE__ + ":" + std::to_string(__LINE__) + ")"
#else
#define ERR_MSG(msg) std::string(boost::typeindex::type_id_with_cvr<decltype(*this)>().pretty_name()) + "::" + __func__ + "(): " + msg
#endif // L4N_DEBUG
#define THROW_RUNTIME_ERROR(msg) std::runtime_error(ERR_MSG(msg))
#define THROW_LOGIC_ERROR(msg) std::logic_error(ERR_MSG(msg))
#define THROW_INVALID_ARGUMENT_ERROR(msg) std::invalid_argument(ERR_MSG(msg))
#define THROW_NOT_IMPLEMENTED_ERROR(msg) std::logic_error(ERR_MSG("This function is not implented." + msg))

但是我收到错误

/home/martin/MyProject/include/../src/DataSet/../Exception/Exceptions.h:9:10: fatal error: boost/type_index.hpp: No such file or directory

当我将 include 指令从Exceptions.h标头移动到包含Exceptions.h的.cpp文件时，错误消失了。当然，我指定了这样的包含路径：

add_library(
MyLib
${LIB_TYPE}
Neuron/Neuron.cpp
Neuron/NeuronBinary.cpp
Neuron/NeuronConstant.cpp
Neuron/NeuronLinear.cpp
Neuron/NeuronLogistic.cpp        
Network/NeuralNetwork.cpp        
Network/NeuralNetworkSum.cpp        
NetConnection/ConnectionFunctionGeneral.cpp        
NetConnection/ConnectionFunctionIdentity.cpp        
LearningMethods/ParticleSwarm.cpp
LearningMethods/GradientDescent.cpp
DataSet/DataSet.cpp
ErrorFunction/ErrorFunctions.cpp
Solvers/DESolver.cpp
Exception/Exceptions.cpp
CSVReader/CSVReader.cpp
CrossValidator/CrossValidator.cpp
NormalizationStrategy/NormalizationStrategy.cpp
)
target_include_directories(
lib4neuro
PUBLIC
${ROOT_DIR}/include
PRIVATE
${EXPRTK_INCLUDE_DIR}
${SRC_DIR}
${Boost_INCLUDE_DIRS}
)

有没有办法也为.h文件而不仅仅是.cpp正确指定包含路径？

最终，更仔细地阅读整个错误消息很有帮助：

In file included from /home/martin/MyLib/include/../src/DataSet/DataSet.h:17,
from /home/martin/MyLib/include/myapi.h:10,
from /home/martin/MyLib/src/examples/net_test_1.cpp:12:
/home/martin/4Neuro/include/../src/DataSet/../Exception/Exceptions.h:9:10: fatal error: boost/type_index.hpp: No such file or directory
#include <boost/type_index.hpp>

正如我们所看到的，Exceptions.h被错误地包含在 API 的一部分DataSet.h中。因此，在尝试使用库编译可执行文件中的代码时，编译失败，而不是在编译库本身期间。

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