Ubuntu安装ymal 1 编译yaml-cpp库
yaml-cpp是github上的一个开源库，通过CMake编译
下载好了，里面有帮助文档，根据帮助文档编译即可
mkdir buildcd buildcmake ..makemake install
2 demo测试
编写一个demo文件，创建一个config.yaml配置文件
name: RandyTel: 18666666 age: 18languages: - Ruby - Perl - Pythonskills: c++: 1 java: 1 android: 1 python: 1label: QQ: hello cc: world JJ: QCJcontainers: - name: hh age: 18 - name: kk age: 12 - name: yy age: 30
main.cpp内容：
#include #include #include "ymal-cpp/yaml.h"#include class Containers{public: std::string m_name; int m_age; static std::vector YamlToContainers(YAML::Node& node) { std::vector containers; for (auto it = node["containers"].begin(); it != node["containers"].end(); it++) { Containers container; container.m_name = it->operator[]("name").as(); container.m_age = it->operator[]("age").as(); containers.push_back(container); } return containers; } std::string ToString(Containers container) { std::stringstream ss; ss << "name: " << container.m_name << 'n' << "age: " << container.m_age << 'n'; return ss.str(); }};int main(int argc, char** argv){ YAML::Node config = YAML::LoadFile("/home/qiancj/Vmware16/ShareFolder/5Codes/yaml_demo/config.yaml"); std::cout << "name:" << config["name"].as() << std::endl; std::cout << "Tel:" << config["Tel"].as() << std::endl; std::cout << "age:" << config["age"].as() << std::endl; std::cout << "skills:" << config["skills"]["c++"].as() << std::endl; // 读取languages for (auto it = config["languages"].begin(); it != config["languages"].end(); it++) { std::cout << it->as() << std::endl; } // 读取label for (auto it = config["label"].begin(); it != config["label"].end(); it++) { std::cout << it->first.as() << ": " << it->second.as() << std::endl; } // 读取containers std::vector p_set = Containers::YamlToContainers(config); for(auto it : p_set) { std::cout << it.ToString(it) << std::endl; } // 写入yaml YAML::Node node; node["Countries"].push_back("China"); node["Countries"].push_back("Russia"); node["Countries"].push_back("Africa"); node["Colors"]["Black"] = "night"; node["Colors"]["Red"] = "sun"; node["Colors"]["Yellow"] = "flower"; node["Colors"]["Green"] = "tree"; std:: cout << node << std::endl; std::ofstream ofs("config.yaml"); ofs << node; ofs.close(); return 0;}
CMakeLists.txt配置如下
project(yaml_demo)add_definitions(-std=c++11)include_directories(include)set(EXECUTABLE_OUTPUT_PATH ${PROJECT_BINARY_DIR}/bin) # 二进制文件的输出目录Message(STATUS, "PRINT ${PROJECT_SOURCE_DIR}")link_directories(${PROJECT_SOURCE_DIR}/lib/yaml-cpp)add_executable(${PROJECT_NAME} main.cpp)target_include_directories(${PROJECT_NAME} PUBLIC ${PROJECT_SOURCE_DIR}/include)target_link_libraries(${PROJECT_NAME} ${PROJECT_SOURCE_DIR}/lib/yaml-cpp/libyaml-cpp.a)
编译过程中总是报错
/tmp/ccCvErNZ.o: In function `YAML::detail::node& YAML::detail::node_data::get(std::string const&, std::shared_ptr)':cricket.cpp:(.text._ZN4YAML6detail9node_data3getISsEERNS0_4nodeERKT_St10shared_ptrINS0_13memory_holderEE[_ZN4YAML6detail9node_data3getISsEERNS0_4nodeERKT_St10shared_ptrINS0_13memory_holderEE]+0x94): undefined reference to `YAML::detail::node_data::convert_to_map(std::shared_ptr)'collect2: error: ld returned 1 exit status
stack overflow上建议直接安装libyaml:
apt-get --build source libyaml-cpp0.5/stable//ordpkg -i libyaml-cpp0.5*.deb
还是不行，需要在CMakeLists.txt中添加：
FIND_PACKAGE(yaml-cpp REQUIRED)
再次测试可以运行
且生成了新的yaml文件
参考
c++如何使用yaml来进行配置
c++ 解析yaml文件
c++ 开发中利用yaml-cpp读写yaml配置文件