diff options
Diffstat (limited to 'src/s3select/rapidjson/example/sortkeys/sortkeys.cpp')
-rw-r--r-- | src/s3select/rapidjson/example/sortkeys/sortkeys.cpp | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/src/s3select/rapidjson/example/sortkeys/sortkeys.cpp b/src/s3select/rapidjson/example/sortkeys/sortkeys.cpp new file mode 100644 index 000000000..7ede9fb93 --- /dev/null +++ b/src/s3select/rapidjson/example/sortkeys/sortkeys.cpp @@ -0,0 +1,62 @@ +#include "rapidjson/document.h" +#include "rapidjson/filewritestream.h" +#include <rapidjson/prettywriter.h> + +#include <algorithm> +#include <iostream> + +using namespace rapidjson; +using namespace std; + +static void printIt(const Value &doc) { + char writeBuffer[65536]; + FileWriteStream os(stdout, writeBuffer, sizeof(writeBuffer)); + PrettyWriter<FileWriteStream> writer(os); + doc.Accept(writer); + cout << endl; +} + +struct NameComparator { + bool operator()(const Value::Member &lhs, const Value::Member &rhs) const { + return (strcmp(lhs.name.GetString(), rhs.name.GetString()) < 0); + } +}; + +int main() { + Document d(kObjectType); + Document::AllocatorType &allocator = d.GetAllocator(); + + d.AddMember("zeta", Value().SetBool(false), allocator); + d.AddMember("gama", Value().SetString("test string", allocator), allocator); + d.AddMember("delta", Value().SetInt(123), allocator); + d.AddMember("alpha", Value(kArrayType).Move(), allocator); + + printIt(d); + +/* +{ + "zeta": false, + "gama": "test string", + "delta": 123, + "alpha": [] +} +*/ + +// C++11 supports std::move() of Value so it always have no problem for std::sort(). +// Some C++03 implementations of std::sort() requires copy constructor which causes compilation error. +// Needs a sorting function only depends on std::swap() instead. +#if __cplusplus >= 201103L || (!defined(__GLIBCXX__) && (!defined(_MSC_VER) || _MSC_VER >= 1900)) + std::sort(d.MemberBegin(), d.MemberEnd(), NameComparator()); + + printIt(d); + +/* +{ + "alpha": [], + "delta": 123, + "gama": "test string", + "zeta": false +} +*/ +#endif +} |