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type Repository interface Find(id int) (string, error) Save(id int, data string) error
// Implement is the core "reflect 4" magic. // It takes an interface type T and returns a struct that implements it. // Since we cannot add methods to a runtime struct, we create a specific // wrapper struct for the target interface using reflect.MakeFunc for every method. func (pb *ProxyBuilder) Implement(targetInterface interface{}) interface{} t := reflect.TypeOf(targetInterface) if t == nil proxy made with reflect 4
// --------------------------------------------------------- // Part 1: The Target Interface // --------------------------------------------------------- // // REAL SOLUTION: // We define a `Proxy` struct
Here’s a deep, reflective piece on the concept of a —written with an awareness of layers, mirrors, and the number four as structural and symbolic anchor. `MakeFunc` creates a function
out := fn.Call(in) result := make([]interface{}, len(out)) for i, v := range out result[i] = v.Interface()
// Let's pivot to the standard powerful pattern: // Implementing an interface using a struct created at runtime? // Impossible in Go without pre-defined types. // // REAL SOLUTION: // We define a `Proxy` struct. We use reflection to inspect the Interface (T), // and we wire up the calls to a generic `Invoke` method using `reflect.MakeFunc`. // Wait, `MakeFunc` creates a function, not a method on a struct.
