将 Boost headers 包含到 .h 文件而不是 .cpp 文件时发生错误

Question

我正在处理一个奇怪的问题。我有一个代码，我需要使用 Boost typeindex 框架实现几个宏。由于我的宏仅包含在 header 文件中，因此我希望 #include <boost/type_index.hpp> 仅包含在 header 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))

但是我收到了错误

/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 header 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}
)

是否有任何方法可以为 .h 文件正确指定包含路径，而不仅仅是 .cpp？

Answer 1

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>

正如我们所见，Exceptions.h 被错误地包含在 DataSet.h 中，而 DataSet.h 是 API 的一部分。因此，当尝试使用库编译可执行文件中的代码时编译失败，而不是在库本身的编译过程中。

将 Boost headers 包含到 .h 文件而不是 .cpp 文件时发生错误

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

c++

boost

cmake

header-files