This is a header-only library for quickly/nearly automatically converting C/C++ structs/classes into minified JSON. It works through a set of macros which allow you to quickly define the JSON schema for an object, by simply marking which fields to write.
I needed a simple library for quickly converting C/C++ data structures into JSON, but only one way. Hence this library was born.
The following is an example JSON definition for a simple datatype:
struct serializable
{
int test;
double anotherTest;
std::string someString;
};
JSONIFY_METHOD(serializable)
{
BEGIN_JSON_OBJ();
WRITE_VARIABLE(test);
WRITE_VARIABLE(anotherTest);
WRITE_VARIABLE(someString);
END_JSON_OBJ();
}JSONIFY_METHOD(typename) generates the correct templated method name with preset variable names. BEGIN_JSON_OBJ()/END_JSON_OBJ() mark the beginning and end of a single JSON object. The calls to WRITE_VARIABLE(variableName) jsonify the target variable and name it correctly. Sample stringification of this type might look like:
serializable test;
test.test = 30;
test.anotherTest = 320.54032f;
test.someString = "This is a test string, containing \"broken characters \n like these";
std::cout << autojson::JSON::stringify(test) << std::endl;which outputs
{"test":30,"anotherTest":320.540314,"someString":"This is a test string, containing \u0022broken characters \u000a like these"}The library also supports nested objects in the same way. For example:
struct nested
{
std::vector<serializable> test;
int another;
};
JSONIFY_METHOD(nested)
{
BEGIN_JSON_OBJ();
WRITE_VARIABLE(test);
WRITE_VARIABLE(another);
END_JSON_OBJ();
}
// ...
nested nesttest;
for (int i = 0; i < 10; ++i)
{
nesttest.test.push_back(test);
nesttest.test[nesttest.test.size() - 1].test = 9 - i;
}
nesttest.another = -3;
std::cout << autojson::JSON::stringify(nesttest) << std::endl;In the above example, nested stores a vector of serializable objects. That yields the JSON string:
{"test":[{"test":9,"anotherTest":320.540314,"someString":"This is a test string, containing \u0022broken characters \u000a like these"},{"test":8,"anotherTest":320.540314,"someString":"This is a test string, containing \u0022broken characters \u000a like these"},{"test":7,"anotherTest":320.540314,"someString":"This is a test string, containing \u0022broken characters \u000a like these"},{"test":6,"anotherTest":320.540314,"someString":"This is a test string, containing \u0022broken characters \u000a like these"},{"test":5,"anotherTest":320.540314,"someString":"This is a test string, containing \u0022broken characters \u000a like these"},{"test":4,"anotherTest":320.540314,"someString":"This is a test string, containing \u0022broken characters \u000a like these"},{"test":3,"anotherTest":320.540314,"someString":"This is a test string, containing \u0022broken characters \u000a like these"},{"test":2,"anotherTest":320.540314,"someString":"This is a test string, containing \u0022broken characters \u000a like these"},{"test":1,"anotherTest":320.540314,"someString":"This is a test string, containing \u0022broken characters \u000a like these"},{"test":0,"anotherTest":320.540314,"someString":"This is a test string, containing \u0022broken characters \u000a like these"}],"another":-3}
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