yaml-cpp

FORK: A YAML parser and emitter in C++
git clone https://git.neptards.moe/neptards/yaml-cpp.git
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parse.cpp (1460B)

      1 #include <fstream>
      2 #include <iostream>
      3 #include <vector>
      4 
      5 #include "yaml-cpp/eventhandler.h"
      6 #include "yaml-cpp/yaml.h"  // IWYU pragma: keep
      7 
      8 struct Params {
      9   bool hasFile;
     10   std::string fileName;
     11 };
     12 
     13 Params ParseArgs(int argc, char** argv) {
     14   Params p;
     15 
     16   std::vector<std::string> args(argv + 1, argv + argc);
     17 
     18   return p;
     19 }
     20 
     21 class NullEventHandler : public YAML::EventHandler {
     22  public:
     23   void OnDocumentStart(const YAML::Mark&) override {}
     24   void OnDocumentEnd() override {}
     25 
     26   void OnNull(const YAML::Mark&, YAML::anchor_t) override {}
     27   void OnAlias(const YAML::Mark&, YAML::anchor_t) override {}
     28   void OnScalar(const YAML::Mark&, const std::string&, YAML::anchor_t,
     29                 const std::string&) override {}
     30 
     31   void OnSequenceStart(const YAML::Mark&, const std::string&, YAML::anchor_t,
     32                        YAML::EmitterStyle::value) override {}
     33   void OnSequenceEnd() override {}
     34 
     35   void OnMapStart(const YAML::Mark&, const std::string&, YAML::anchor_t,
     36                   YAML::EmitterStyle::value) override {}
     37   void OnMapEnd() override {}
     38 };
     39 
     40 void parse(std::istream& input) {
     41   try {
     42     YAML::Node doc = YAML::Load(input);
     43     std::cout << doc << "\n";
     44   } catch (const YAML::Exception& e) {
     45     std::cerr << e.what() << "\n";
     46   }
     47 }
     48 
     49 int main(int argc, char** argv) {
     50   Params p = ParseArgs(argc, argv);
     51 
     52   if (argc > 1) {
     53     std::ifstream fin;
     54     fin.open(argv[1]);
     55     parse(fin);
     56   } else {
     57     parse(std::cin);
     58   }
     59 
     60   return 0;
     61 }