C++ - Passing rapidjson::Document as an argument to a function
Use a reference or a value as argument. Using the [] with a pointer will try to use your document as if it was an array of document. A reference or a value will call the expected operator.
// a const referencefoo(const rapidjson::Document& jsonDocument) { std::cout << jsonDocument["name"] << std::endl;}// a copy (or move)foo(rapidjson::Document jsonDocument) { std::cout << jsonDocument["name"] << std::endl;}I'd recommend you to use the reference, as your function don't need to consume any resources in the document, but only observe and print a value.
The call of this function will look like this:
rapidjson::Document doc = /* ... */;foo(doc);