Go 1.22 Introduces New Generic Function: reflect.TypeFor()

2023/08/29

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The article discusses a new generic function called reflect.TypeFor() that is likely to be introduced in Go 1.22. This function returns the reflect.Type of its type, which can be used for further reflection or to compare with other types obtained through reflection. The existing reflect.TypeOf() function was not generic, making its usage awkward. The article provides an example from the net/rpc package, where the old code to check if a method returns an error was complex and difficult to read. The new code using TypeFor() simplifies the process. The article also explains the limitations of reflect.TypeOf() when dealing with interfaces and how TypeFor() overcomes them. It is mentioned that TypeFor() works similarly to TypeOf() but is generalized. This new feature in Go 1.22 will be beneficial for developers working with reflection in their code.