a5b72f7ae6
On my Macbook Pro, reading from standard input incurs a bunch of locking overhead, which complicates profiling and (IMO) adds noise to results. This adds the option to read from a file, which doesn't incur this overhead.
45 lines
1.2 KiB
C++
45 lines
1.2 KiB
C++
#include <fstream>
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#include <iostream>
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#include "yaml-cpp/emitterstyle.h"
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#include "yaml-cpp/eventhandler.h"
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#include "yaml-cpp/yaml.h" // IWYU pragma: keep
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class NullEventHandler : public YAML::EventHandler {
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public:
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typedef YAML::Mark Mark;
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typedef YAML::anchor_t anchor_t;
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NullEventHandler() {}
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virtual void OnDocumentStart(const Mark&) {}
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virtual void OnDocumentEnd() {}
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virtual void OnNull(const Mark&, anchor_t) {}
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virtual void OnAlias(const Mark&, anchor_t) {}
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virtual void OnScalar(const Mark&, const std::string&, anchor_t,
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const std::string&) {}
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virtual void OnSequenceStart(const Mark&, const std::string&, anchor_t,
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YAML::EmitterStyle::value style) {}
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virtual void OnSequenceEnd() {}
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virtual void OnMapStart(const Mark&, const std::string&, anchor_t,
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YAML::EmitterStyle::value style) {}
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virtual void OnMapEnd() {}
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};
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void run(YAML::Parser& parser) {
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NullEventHandler handler;
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parser.HandleNextDocument(handler);
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}
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int main(int argc, char** argv) {
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if (argc > 1) {
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std::ifstream in(argv[1]);
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YAML::Parser parser(in);
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run(parser);
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} else {
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YAML::Parser parser(std::cin);
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run(parser);
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}
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return 0;
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}
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