yaml_to_json.cpp

#include <yaml-cpp/yaml.h>
#include <iostream>
#include <string>

int main() {
  YAML::Node node = YAML::Load(R"foo(
    a:
      b: c
      d: 1
  )foo");

  // Method without BeginSeq
  YAML::Emitter emitter1;
  emitter1 << YAML::DoubleQuoted << YAML::Flow << node;
  std::string out1(emitter1.c_str());
  std::cout << "Output without BeginSeq:\n" << out1 << '\n';
  
  // Approach using BeginSeq
  YAML::Emitter emitter2;
  emitter2 << YAML::DoubleQuoted << YAML::Flow << YAML::BeginSeq << node;
  std::string out2(emitter2.c_str() + 1);  // Strip leading [ character
  std::cout << "Output with BeginSeq:\n" << out2 << '\n';
}

/*
On my system, this program outputs:
Output without BeginSeq:
"a":
  "b": "c"
  "d": "1"
Output with BeginSeq:
{"a": {"b": "c", "d": "1"}}
*/