How Can I Serialize a Custom Class with Qt?

Custom Data Serialization with Qt

Problem:

You want to serialize a large std::map containing a custom class, "MyType," with various data fields. You're using the Qt library and are exploring its capabilities for data serialization.

Solution:

Qt provides QDataStream, a feature that supports a range of C and Qt data types. For custom types, such as "MyType," you can define your own serialization operators to make them compatible with QDataStream.

Here's an example of defining a custom type, "Painting," and its serialization operators:

class Painting {
public:
    // ...
private:

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