Hi, thanks for your reply. I am still in the learning phase and when I learn the usage of a new tool I try to keep notes of *what's allowed *and *what's not allowed* by that tool. That's all :) So at this moment, it's not possible for me to come up with a concrete production-level use case. But the behavior I described is very common in dynamic languages. If a field doesn't exist, create that field at runtime. If a method doesn't exist, make some decision on-the-fly, maybe call another method. In both cases, the caller *knows* that they (field and method) don't exist and *expects* that they will be created/responded accordingly at runtime instead of failing. In PHP they're known as *Magic Methods. *In JavaScript, they're called *Proxies.* I know that's too much dynamic behavior to ask from a statically typed language. But now I know that it's not allowed.
On Sunday, April 12, 2020 at 9:13:03 AM UTC+6, Kurtis Rader wrote: > > On Sat, Apr 11, 2020 at 7:59 PM Tanmay Das <tanma...@gmail.com > <javascript:>> wrote: > >> Say you have a struct Foo and you access fields and call methods on it as >> you normally would. But is it possible to execute a hook before or after >> that field access or method call? A good scenario will be: >> >> The user calls non-existent method foo.Bar() or accesses non-existent >> field foo.Bar. If they don't exist, I want to: >> a) In case of a method call: forward that call to foo.Baz() >> b) In case of field access: set the foo.Bar at runtime with some value >> > > No, as far as I know. You're looking for a language like Python, which I > love, but that isn't the Go model of behavior. This also seems like a > http://xyproblem.info/ question. What is it you really want to do? Are > you trying to mock something for a unit test? > > -- > Kurtis Rader > Caretaker of the exceptional canines Junior and Hank > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/4417bc0c-d521-4a3b-a8af-78c399238e80%40googlegroups.com.
