How exactly would this work? r.Form is of type url.Values, so it can't possibly make a call back to http.Request - that would mean an import cycle.

This functionality is already implemented in one way as r.FormValue but the parse error is ignored and multiple values for a key isn't handled (POST/PUT body parameters take precedence over URL query values, and the first value is picked).

// Go 2 improvement?
func (r *Request) FormValue(key string) ([]string, error)

Go 2 net/http improvements: #5465

Ah, I didn't know about r.FormValue 😋 That is indeed what I need! Most of form tutorials were using Parse and then Form.Get, so I thought maybe it doesn't exist.
What about an alias GetFormValue? because first time I tried to find the function in my IDE, I typed req.Get in hopes something like this will show up.

Go2 changes are already being tracked in another issue, so I'm going to close this one.

Exposing the same method under two names is a bad idea in my opinion; especially since Go tends to not like getters: https://golang.org/doc/effective_go.html#Getters