yaml-cpp is a parser for YAML with C++.
With it you can read YAML files quickly through C++ code.
Installation
To install, just clone with git, compile and install with CMake, run the commands below:
git clone https://github.com/jbeder/yaml-cpp
cd yaml-cpp
cmake -B build .
cmake --build build
sudo cmake --install buildSee here the files that are installed
-- Install configuration: ""
-- Installing: /usr/local/lib/libyaml-cpp.a
-- Up-to-date: /usr/local/include
-- Installing: /usr/local/include/yaml-cpp
-- Installing: /usr/local/include/yaml-cpp/emitterstyle.h
-- Installing: /usr/local/include/yaml-cpp/eventhandler.h
-- Installing: /usr/local/include/yaml-cpp/binary.h
-- Installing: /usr/local/include/yaml-cpp/emitterdef.h
-- Installing: /usr/local/include/yaml-cpp/yaml.h
-- Installing: /usr/local/include/yaml-cpp/null.h
-- Installing: /usr/local/include/yaml-cpp/contrib
-- Installing: /usr/local/include/yaml-cpp/contrib/anchordict.h
-- Installing: /usr/local/include/yaml-cpp/contrib/graphbuilder.h
-- Installing: /usr/local/include/yaml-cpp/ostream_wrapper.h
-- Installing: /usr/local/include/yaml-cpp/anchor.h
-- Installing: /usr/local/include/yaml-cpp/parser.h
-- Installing: /usr/local/include/yaml-cpp/emitfromevents.h
-- Installing: /usr/local/include/yaml-cpp/emittermanip.h
-- Installing: /usr/local/include/yaml-cpp/traits.h
-- Installing: /usr/local/include/yaml-cpp/exceptions.h
-- Installing: /usr/local/include/yaml-cpp/fptostring.h
-- Installing: /usr/local/include/yaml-cpp/node
-- Installing: /usr/local/include/yaml-cpp/node/parse.h
-- Installing: /usr/local/include/yaml-cpp/node/type.h
-- Installing: /usr/local/include/yaml-cpp/node/ptr.h
-- Installing: /usr/local/include/yaml-cpp/node/node.h
-- Installing: /usr/local/include/yaml-cpp/node/convert.h
-- Installing: /usr/local/include/yaml-cpp/node/impl.h
-- Installing: /usr/local/include/yaml-cpp/node/emit.h
-- Installing: /usr/local/include/yaml-cpp/node/iterator.h
-- Installing: /usr/local/include/yaml-cpp/node/detail
-- Installing: /usr/local/include/yaml-cpp/node/detail/memory.h
-- Installing: /usr/local/include/yaml-cpp/node/detail/node.h
-- Installing: /usr/local/include/yaml-cpp/node/detail/impl.h
-- Installing: /usr/local/include/yaml-cpp/node/detail/node_data.h
-- Installing: /usr/local/include/yaml-cpp/node/detail/node_iterator.h
-- Installing: /usr/local/include/yaml-cpp/node/detail/iterator_fwd.h
-- Installing: /usr/local/include/yaml-cpp/node/detail/iterator.h
-- Installing: /usr/local/include/yaml-cpp/node/detail/node_ref.h
-- Installing: /usr/local/include/yaml-cpp/dll.h
-- Installing: /usr/local/include/yaml-cpp/stlemitter.h
-- Installing: /usr/local/include/yaml-cpp/noexcept.h
-- Installing: /usr/local/include/yaml-cpp/depthguard.h
-- Installing: /usr/local/include/yaml-cpp/mark.h
-- Installing: /usr/local/include/yaml-cpp/emitter.h
-- Installing: /usr/local/lib/cmake/yaml-cpp/yaml-cpp-targets.cmake
-- Installing: /usr/local/lib/cmake/yaml-cpp/yaml-cpp-targets-noconfig.cmake
-- Installing: /usr/local/lib/cmake/yaml-cpp/yaml-cpp-config.cmake
-- Installing: /usr/local/lib/cmake/yaml-cpp/yaml-cpp-config-version.cmake
-- Installing: /usr/local/lib/pkgconfig/yaml-cpp.pcBasic example
Let’s suppose you have this example file of the YAML type: example.yaml:
person:
name: Marcos
last name: Oliveira
age: 39
profession: Programmer
height: 1.73And here is the C++ code that will do the parsing: main.cpp
#include <print>
#include <fstream>
#include <yaml-cpp/yaml.h>
int main(){
YAML::Node doc = YAML::LoadFile("./example.yaml");
YAML::Node person = doc["person"];
std::string name = person["name"].as<std::string>();
std::string last name = person["last name"].as<std::string>();
int age = person["age"].as<int>();
std::string profession = person["profession"].as<std::string>();
double height = person["height"].as<double>();
std::println("First name: {}", name);
std::println("Last name: {}", last name);
std::println("Age: {}", age);
std::println("Profession: {}", profession);
std::println("Height: {}", height);
return EXIT_SUCCESS;
}Remember that in this example I used std::println instead of
iostream.
Compile using the flag for yaml-cpp:
g++ main.cpp -lyaml-cppAnd after running the binary the output will be:
First name: Marcos
Last name: Oliveira
Age: 39
Profession: Programmer
Height: 1.73Easy, right?! For more information access the repository and the examples for using the API
