What are the scenarios where reflection is used in the Go language?

The reflection mechanism in the Go language can be used for the following scenarios:

1. Dynamic calling: Functions or methods can be dynamically called using reflection by passing the function name string, enabling dynamic method calling.
2. Parse structure: You can use reflection to parse the fields and properties of a structure, obtaining information such as names, types, and labels, which can be used for generating documents, serialization, and deserialization.
3. Dynamic object creation: Reflection can be used to dynamically create objects by passing the type and parameters to instantiate objects, achieving functionality similar to the factory pattern.
4. Modify the field values of an object: You can change the field values of an object by using reflection, retrieving the corresponding field object using the field name string, and then modifying the field value using the SetValue method of reflection.
5. Injecting dependencies: Reflection can be used to achieve dependency injection by creating objects and injecting dependencies through reflection. This can lead to a loosely coupled design.
6. Dynamic proxy: Dynamic proxy can be achieved using reflection, by generating a proxy object through reflection, calling the methods of the original object within the proxy object, and adding additional logic.

It is important to note that reflection is a dynamic and flexible mechanism, but because its underlying operations are based on interfaces, it can impose some performance overhead, so it should be used cautiously in high-performance scenarios.