Can Go Dynamically Create Methods?

Can You Create a Method Dynamically in Go?

Methods are functions with receivers, allowing us to associate them with specific types. While it's possible to dynamically create functions using reflect.MakeFunc, what about methods?

Answer:

No, Go does not support dynamic method creation. The receiver's type defines the set of methods available to it. Modifying this set at runtime would require runtime interface-implementation checks.

However, there's a workaround:

Forking the Reflect Package:

By creating your own version of the reflect package, you could simulate method creation by building a value representing a method attached to a type. However, this won't actually change the type's method set.

Swapping Method Pointers:

While Go doesn't embed virtual method dispatch tables in concrete values, they exist in interface values. You could manipulate the itab field of a reflect.nonEmptyInterface to swap method pointers dynamically. However, this is a complex operation that requires a deep understanding of Go internals.

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