yaml-cpp开源库使用

源码下载：https://github.com/jbeder/yaml-cpp

1.yaml-cpp编译

步骤主要如下：进入源码目录后

mkdir build
cd build
cmake …
make
make install

2.代码示例

#include "funset.hpp"
#include <string>
#include <fstream>
#include <yaml-cpp/yaml.h>int test_parse_yaml_file()
{
#ifdef _MSC_VERYAML::Node config = YAML::LoadFile("E:/GitCode/Messy_Test/testdata/test_yaml-cpp.yml");
#elseYAML::Node config = YAML::LoadFile("testdata/test_yaml-cpp.yml");
#endifstd::string blog_name{"xxxxx"}, blog_id{"xxxxx"}, blog_url{"xxxxx"};if (config["blog"]){if (config["blog"]["name"])blog_name = config["blog"]["name"].as<std::string>();if (config["blog"]["id"])blog_id = config["blog"]["id"].as<std::string>();if (config["blog"]["url"])blog_url = config["blog"]["url"].as<std::string>();}else{fprintf(stderr, "the node blog doesn't exist\n");}fprintf(stdout, "blog name: %s, id: %s, url: %s\n",blog_name.c_str(), blog_id.c_str(), blog_url.c_str());bool value1, value2;if (config["value1"])value1 = config["value1"].as<bool>();if (config["value2"])value2 = config["value2"].as<bool>();fprintf(stdout, "value1: %d, value2: %d\n", value1, value2);int number1;std::string number2, number3;float number4;if (config["number1"])number1 = config["number1"].as<int>();if (config["number2"])number2 = config["number2"].as<std::string>();if (config["number3"])number3 = config["number3"].as<std::string>();if (config["number4"])number4 = config["number4"].as<float>();fprintf(stdout, "number1: %d, number2: %s, number3: %s, number4: %f\n",number1, number2.c_str(), number3.c_str(), number4);std::string github_url, github_repos;if (config["github"])github_url = config["github"][0].as<std::string>();github_repos = config["github"][1].as<std::string>();fprintf(stdout, "github url: %s, repos: %s\n", github_url.c_str(), github_repos.c_str());return 0;
}int test_generate_yaml_file()
{YAML::Node node;node["language"] = "cpp";node["version"] = 2;node["url"].push_back("https://blog.csdn.net/fengbingchun");node["url"].push_back("https://github.com/fengbingchun");YAML::Node primes = YAML::Load("[2, 3, 5, 7, 11]");primes.push_back(13);fprintf(stdout, "primes size: %d\n", primes.size());node["primes"] = primes;YAML::Node lineup = YAML::Load("{1B: Prince Fielder, 2B: Rickie Weeks, LF: Ryan Braun}");lineup["RF"] = "Corey Hart";lineup["C"] = "Jonathan Lucroy";node["name"] = lineup;node["platform"]["linux"].push_back("x86");node["platform"]["linux"].push_back("x86_64");node["platform"]["linux"].push_back("armv7");node["platform"]["windows"].push_back("x86");node["platform"]["windows"].push_back("x86_64");#ifdef _MSC_VERstd::ofstream fout("E:/GitCode/Messy_Test/testdata/tmp.yml");
#elsestd::ofstream fout("testdata/tmp.yaml");
#endiffout << node;return 0;
}

yml文件内容如下所示：

blog:name: csdnid: fengbingchunurl: https://blog.csdn.net/fengbingchuncommands:version:- g++ --version- cmake --version- git --versionvalue1: true
value2: false
value3: ~number1: 123
number2: !!str 123
number3: "123"
number4: !!float 123github: - https://github.com/fengbingchun- NN_Test Face_Test OpenCV_TestMessy_Test CUDA_Testdata1: |There oncewas ashort mandata2: >There oncewas ashort mandate1: 2019-03-03step: &id001   # defines anchor label &id001instrument:  Lasik 2000pulseEnergy: 5.4step2: *id001   # refers to the first step (with anchor &id001)